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WO2009050814A1 - Polarization direction detector for ferroelectric material and method of detecting polarization direction - Google Patents

Polarization direction detector for ferroelectric material and method of detecting polarization direction Download PDF

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Publication number
WO2009050814A1
WO2009050814A1 PCT/JP2007/070373 JP2007070373W WO2009050814A1 WO 2009050814 A1 WO2009050814 A1 WO 2009050814A1 JP 2007070373 W JP2007070373 W JP 2007070373W WO 2009050814 A1 WO2009050814 A1 WO 2009050814A1
Authority
WO
WIPO (PCT)
Prior art keywords
polarization direction
signal
ferroelectric material
resonant circuit
probe
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/JP2007/070373
Other languages
French (fr)
Japanese (ja)
Inventor
Kiyoshi Tateishi
Takanori Maeda
Tomotaka Yabe
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
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 Pioneer Corp filed Critical Pioneer Corp
Priority to PCT/JP2007/070373 priority Critical patent/WO2009050814A1/en
Publication of WO2009050814A1 publication Critical patent/WO2009050814A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/08—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by electric charge or by variation of electric resistance or capacitance
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/02—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using ferroelectric record carriers; Record carriers therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
    • G11B9/07—Heads for reproducing capacitive information
    • G11B9/075—Heads for reproducing capacitive information using mechanical contact with record carrier, e.g. by stylus

Landscapes

  • Measurement Of Resistance Or Impedance (AREA)

Abstract

A polarization direction detector for a ferroelectric material which includes at least one probe which should be disposed in contact with or in the vicinity of the surface of a ferroelectric material, and an electric field applying means for applying an alternating electric field to a capacitor component immediately below the probe inside the ferroelectric material, and which detects the polarization direction of the ferroelectric material immediately below the probe based on a change in electrostatic capacity of the capacitor component accompanying the application of the alternating electric field. The polarization direction detector also includes a resonant circuit including a capacitor component, a reference phase oscillator for applying a high-frequency AC signal to the resonant circuit, a phase comparing means for generating a phase difference signal having a signal level in accordance with a phase difference between a resonant signal extracted from the resonant circuit with the application of the high-frequency AC signal to the resonant circuit and the high-frequency AC signal, and a synchronous detecting means which synchronously detects the phase difference signal based on a synchronous signal and generates a polarization direction detection signal corresponding to the polarization direction immediately below the probe inside the ferroelectric material.
PCT/JP2007/070373 2007-10-18 2007-10-18 Polarization direction detector for ferroelectric material and method of detecting polarization direction Ceased WO2009050814A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/070373 WO2009050814A1 (en) 2007-10-18 2007-10-18 Polarization direction detector for ferroelectric material and method of detecting polarization direction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/070373 WO2009050814A1 (en) 2007-10-18 2007-10-18 Polarization direction detector for ferroelectric material and method of detecting polarization direction

Publications (1)

Publication Number Publication Date
WO2009050814A1 true WO2009050814A1 (en) 2009-04-23

Family

ID=40567106

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/070373 Ceased WO2009050814A1 (en) 2007-10-18 2007-10-18 Polarization direction detector for ferroelectric material and method of detecting polarization direction

Country Status (1)

Country Link
WO (1) WO2009050814A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS568563A (en) * 1979-07-02 1981-01-28 Toshiba Corp Measuring device for reactance change
JPH08307199A (en) * 1995-01-11 1996-11-22 Yoshiro Tomikawa Capacitive component reduction circuit for electrostatic conversion means and driver and detector for electrostatic conversion means
JP2002323431A (en) * 2001-02-26 2002-11-08 Seiko Instruments Inc Scanning nonlinear permittivity microscope for measuring higher order nonlinear permittivity
JP2005502886A (en) * 2001-09-10 2005-01-27 パイオニア株式会社 Dielectric constant measuring apparatus, dielectric measuring method, and information recording / reproducing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS568563A (en) * 1979-07-02 1981-01-28 Toshiba Corp Measuring device for reactance change
JPH08307199A (en) * 1995-01-11 1996-11-22 Yoshiro Tomikawa Capacitive component reduction circuit for electrostatic conversion means and driver and detector for electrostatic conversion means
JP2002323431A (en) * 2001-02-26 2002-11-08 Seiko Instruments Inc Scanning nonlinear permittivity microscope for measuring higher order nonlinear permittivity
JP2005502886A (en) * 2001-09-10 2005-01-27 パイオニア株式会社 Dielectric constant measuring apparatus, dielectric measuring method, and information recording / reproducing apparatus

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