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WO2012019806A1 - Procédé et dispositif d'excitation d'ondes de spin dans des solides magnétiques - Google Patents

Procédé et dispositif d'excitation d'ondes de spin dans des solides magnétiques Download PDF

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Publication number
WO2012019806A1
WO2012019806A1 PCT/EP2011/059667 EP2011059667W WO2012019806A1 WO 2012019806 A1 WO2012019806 A1 WO 2012019806A1 EP 2011059667 W EP2011059667 W EP 2011059667W WO 2012019806 A1 WO2012019806 A1 WO 2012019806A1
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WO
WIPO (PCT)
Prior art keywords
solid
magnetic
laser beam
domain wall
solid body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2011/059667
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German (de)
English (en)
Inventor
Rudolf Schäfer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leibniz Institut fuer Festkorper und Werkstofforschung Dresden eV
Original Assignee
Leibniz Institut fuer Festkorper und Werkstofforschung Dresden eV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leibniz Institut fuer Festkorper und Werkstofforschung Dresden eV filed Critical Leibniz Institut fuer Festkorper und Werkstofforschung Dresden eV
Publication of WO2012019806A1 publication Critical patent/WO2012019806A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
    • G11C13/06—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using magneto-optical elements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/14—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
    • G11C11/161—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect details concerning the memory cell structure, e.g. the layers of the ferromagnetic memory cell
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
    • G11C11/165—Auxiliary circuits
    • G11C11/1675—Writing or programming circuits or methods
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
    • G11C19/0808—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure using magnetic domain propagation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits

Definitions

  • the invention relates to a method and an arrangement for spin wave excitation in ferromagnetic or ferrimagnetic solids, for example in a magnetic conductor or in a magnetic nanowire.
  • the invention is particularly applicable to signal and information transport based on propagating spin waves in electrical circuits and devices as well as in the field of logic circuit implementation.
  • spin In addition to an electrical charge, electrons have an intrinsic angular momentum, the so-called spin.
  • the spin system in this way in a magnetic solid can be excited by an external pulsating energy supply such that a collective movement of the spins in the form of a wave in the
  • Spin wave packets which can also be interpreted as spin wave current, can transport signals and information in the solid state, which conventionally can only be realized by electrical currents or light in optical fibers (for example glass fibers).
  • the heat input caused by the laser light is utilized in the
  • the heat input changes the exchange coupling between the layers, thereby exciting spin waves. Since the heat input to a permanent, non-reversible change of the material and thus the
  • the invention has for its object to provide a method for spin wave excitation, can be stimulated with the spin wave types of the same type reproducible in simply constructed solids without the use of electrical currents, magnetic fields and heat effects. Included in this task is the creation of an advantageously usable for carrying out the new method arrangement.
  • the inventive method is characterized in that a locally fixed in a magnetic solid domain wall is illuminated using the inverse magneto-optical gradient effect with polarized pulsed laser light, the illumination in vertical incidence in magnetized in the plane of the solid domains and in oblique incidence in Trap is made perpendicular to the solid state level of magnetized domains.
  • the inverse magneto-optical gradient effect is used according to the invention. This is a reversal of the direct
  • the present invention is based on the idea of inverting the gradient effect.
  • a planar-magnetized domain structure is illuminated perpendicularly with linearly polarized light, or a perpendicularly magnetized one
  • Domain structure obliquely illuminated with linearly polarized light, which may be (but not necessarily) previously polarized by means of a phase shifter elliptical or circular.
  • the occurring inverse gradient effect causes a suitable direction of rotation of the incident light and with a suitable orientation of the domain wall according to the dielectric law of
  • Gradient effect a change of existing magnetization gradients, which in particular affects existing domain walls.
  • a gradient change is caused by the magnetization slightly rotating in the immediate vicinity of the wall.
  • spin waves are triggered on both sides of the wall, which then propagate away from the wall in the ferro- or ferrimagnetic solid.
  • Gradient effect and thus for the function of the method according to the invention is that illuminated with the polarized pulsed laser light Domain wall is fixed locally in the magnetic solid.
  • domain walls are known not fixed, but relatively easy to move.
  • the present invention includes useful technical measures for fixing the domain wall in the solid state.
  • Another essential feature of the invention is that the locally fixed domain wall is illuminated with the polarized pulsed laser light while avoiding heat input into the solid.
  • Avoiding a heat input into the solid can be realized in an expedient manner by means of the choice of the wavelength, the pulse duration and / or the fluence of the pulsed laser light.
  • linearly polarized, elliptically polarized or circularly polarized pulsed laser light is used to illuminate the solid.
  • the laser light may be a pulsed laser beam with a pulse duration in the picosecond or femtosecond range.
  • the polarization direction or the direction of polarization of the laser beam can be changed during illumination.
  • a magnetic solid a ferromagnetic or ferrimagnetic material is used, in which the laser-light-illuminated domain wall by a material processing by means of embossing or bending of the solid or by a local change of the magnetic properties by
  • the inventive arrangement for exciting spin waves in a magnetic solid contains a pulsed laser source for illuminating a locally fixed in a solid domain wall with a polarized laser beam, wherein the pulse laser source is a femtosecond or picosecond laser.
  • a device for changing the polarization of the laser beam is arranged in the laser beam.
  • This device can be a phase shifter with which a linear or elliptical or circular polarization of the laser light can be set.
  • a device for changing the focus of the laser beam is also arranged in the laser beam.
  • a further feature of the arrangement according to the invention is that the laser beam can be directed onto the surface of the solid by means of a pivotable pulse laser source or by means of a mirror arrangement in a vertical or oblique incidence.
  • the inventive method has several advantages over the prior art.
  • a significant advantage is that spin waves are excited optically by illumination with a pulsed laser. As a result, no electric currents for magnetic field generation are required and it eliminates the known solutions adhering adverse heating due to the current flow. Another advantage is that the direct nature of the excitation eliminates the time delays inherent in the prior art. A further advantage is that no electrical conductors for spin wave generation are required. The electrical switching and logic circuits can thus be made less complex and it is a higher integration density possible.
  • Modified heat exchange layer-coupled layer systems the present invention also has advantages.
  • a significant advantage is that Layer systems are not required, since according to the invention the spin waves in
  • Fig. 1 the schematic diagram of an arrangement for exciting spin waves
  • Figure 2 three examples of further suitable for spin wave excitation
  • Fig. 1 The arrangement shown in Fig. 1 is used to excite spin waves in a consisting of a ferromagnetic material solid, the one
  • the ferromagnetic material is NisiFei9 (permalloy).
  • the spin waveguide 1 and has a locally fixed domain wall 2, which separates two perpendicularly magnetized domains.
  • the local fixation of the domain wall has been done by ion implantation.
  • the pulsed laser source 3 generates a pulsed laser beam with a pulse duration in the picosecond range, with which the locally fixed domain wall 2 is illuminated.
  • the pulse laser source 3 is by means of a not shown in the drawing
  • the laser beam in vertical incidence in the case of the present in the example parallel to the spin waveguide track plane magnetized domains or in oblique incidence with domains magnetized perpendicular to the plane of the spin waveguide path aligned with the domain wall.
  • the arrangement comprises a first means 5 for changing the polarization of the laser beam, which is a phase shifter with which an elliptical or a circular polarization of the laser light can be adjusted.
  • the condition of avoiding heat input into the solid body is by means of the choice of the wavelength, the pulse duration and / or the fluence of the pulsed one
  • the generated spin wave is advantageously used for signal and information transport in the spin waveguide 1.
  • the spin waveguide tracks shown in FIG. 2 consist of ferromagnetic or ferrimagnetic material and each have a locally fixed domain wall 2.
  • Domain wall 2 realized by means of an embossing.
  • the local fixation of the domain wall 2 is realized in a simple manner by means of a turn.
  • the lower spin waveguide path is the
  • Domains wall 2 fixed in a circular disk-shaped end of the conductor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'excitation d'ondes de spin dans des solides ferromagnétiques ou ferrimagnétiques, par exemple, dans une piste conductrice magnétique ou dans un nanofil magnétique. L'invention est utilisable en particulier pour le transport de signaux et d'informations, sur la base d'ondes de spin en propagation, dans des circuits et des composants électriques, ainsi que dans le domaine de la réalisation de circuits logiques. L'invention a pour but de fournir un procédé d'excitation d'ondes de spin au moyen duquel des ondes de spin du même type peuvent être excitées de manière reproductible dans des solides de structure simple sans l'utilisation de courants électriques, de champs magnétiques et d'effets thermiques. L'invention a également pour but de fournir un dispositif utilisable avantageusement pour la mise en oeuvre du nouveau procédé. Le procédé selon l'invention est caractérisé en ce qu'une paroi de domaine fixée localement dans un solide magnétique est éclairée au moyen d'une lumière laser pulsée polarisée, en utilisant un effet de gradient magnéto-optique inverse, l'éclairage de la paroi de domaine étant effectué en incidence verticale, pour des domaines magnétisés dans le plan du solide, et en incidence oblique, dans le cas de domaines magnétisés perpendiculairement au plan du solide, en particulier tout en évitant un apport thermique dans le solide.
PCT/EP2011/059667 2010-08-12 2011-06-10 Procédé et dispositif d'excitation d'ondes de spin dans des solides magnétiques Ceased WO2012019806A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102010039261.8 2010-08-12
DE102010039261 2010-08-12
DE102010040241 2010-09-03
DE102010040241.9 2010-09-03

Publications (1)

Publication Number Publication Date
WO2012019806A1 true WO2012019806A1 (fr) 2012-02-16

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014102728A1 (fr) * 2012-12-26 2014-07-03 Kalyoncu Yemliha Bilal Système et procédé de mémorisation de données opto-magnétiques tridimensionnels
WO2016124645A1 (fr) * 2015-02-04 2016-08-11 Consejo Superior De Investigaciones Científicas Procédé de commutation de polarisation ferroélectrique au moyen d'une lumière polarisée
WO2016193552A1 (fr) * 2015-06-05 2016-12-08 Aalto University Foundation Élément de production d'ondes de spin et composant logique comportant un tel élément
DE102017217295A1 (de) * 2017-09-28 2019-03-28 Robert Bosch Gmbh Drucksensor und Verfahren zum Messen eines Drucks mittels eines Drucksensors
CN110232939A (zh) * 2019-06-10 2019-09-13 中国科学院半导体研究所 激光加热控制磁随机的存储单元、存储器和逻辑器件
CN114706253A (zh) * 2022-03-09 2022-07-05 广州大学 一种动态调控自旋波传播方向的光学方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007037625A1 (fr) 2005-09-29 2007-04-05 Seoul National University Industry Foundation Procédé de production d'ondes de spin puissantes et de dispositifs à ondes de spin pour un traitement ultra-rapide de l'information utilisant des ondes de spin
WO2007136243A1 (fr) * 2006-05-24 2007-11-29 Stichting Katholieke Universiteit, More Particulary The Radboud University Nijmegen Medical Centre Dispositif de commutation magnéto-optique et procédé pour commuter un support magnétisable

Patent Citations (3)

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WO2007037625A1 (fr) 2005-09-29 2007-04-05 Seoul National University Industry Foundation Procédé de production d'ondes de spin puissantes et de dispositifs à ondes de spin pour un traitement ultra-rapide de l'information utilisant des ondes de spin
US20080231392A1 (en) 2005-09-29 2008-09-25 Sang-Koog Kim Method of Generating Strong Spin Waves and Spin Devices for Ultra-High Speed Information Processing Using Spin Waves
WO2007136243A1 (fr) * 2006-05-24 2007-11-29 Stichting Katholieke Universiteit, More Particulary The Radboud University Nijmegen Medical Centre Dispositif de commutation magnéto-optique et procédé pour commuter un support magnétisable

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014102728A1 (fr) * 2012-12-26 2014-07-03 Kalyoncu Yemliha Bilal Système et procédé de mémorisation de données opto-magnétiques tridimensionnels
US9812202B2 (en) 2012-12-26 2017-11-07 Yemliha Bilal KALYONCU Three dimensional opto-magnetic data storage system and method
WO2016124645A1 (fr) * 2015-02-04 2016-08-11 Consejo Superior De Investigaciones Científicas Procédé de commutation de polarisation ferroélectrique au moyen d'une lumière polarisée
WO2016193552A1 (fr) * 2015-06-05 2016-12-08 Aalto University Foundation Élément de production d'ondes de spin et composant logique comportant un tel élément
DE102017217295A1 (de) * 2017-09-28 2019-03-28 Robert Bosch Gmbh Drucksensor und Verfahren zum Messen eines Drucks mittels eines Drucksensors
CN110232939A (zh) * 2019-06-10 2019-09-13 中国科学院半导体研究所 激光加热控制磁随机的存储单元、存储器和逻辑器件
CN114706253A (zh) * 2022-03-09 2022-07-05 广州大学 一种动态调控自旋波传播方向的光学方法

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