Ferroelectric and magnetic properties of CdMnS films prepared by coevaporation

D. H. Kim; D. J. Lee; N. M. Kim; S. J. Lee; T. W. Kang; Y. D. Woo; D. J. Fu

doi:10.1063/1.2730572

Ferroelectric and magnetic properties of CdMnS films prepared by coevaporation

D. H. Kim, D. J. Lee, N. M. Kim, S. J. Lee, T. W. Kang, Y. D. Woo, D. J. Fu

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Abstract

We report on impurity ferroelectricity and ferromagnetic properties in semiconductor-structured CdMnS films. We observed ferroelectric hysteresis in CdMnS. A remnant polarization of 1.72 μC/ cm2 and a coercive field of 14.3 kV/cm were obtained in samples with Mn concentration below 2%. The coevaporated CdMnS samples become ferromagnetic when doped with Au, with a spontaneous magnetization of 1.39× 10-6 emu and a coercive magnetic field of 75.4 gauss at 10 K, and the Curie point was found to be higher than room temperature. Through magnetic force microscopy, we observed clear magnetic clusters with sizes ranging from a few nanometers to 102 nm, and found the magnetization to be highly dependent on Au concentration. A combination of this ferroelectricity in CdMnS and ferromagnetism in Au-doped CdMnS may find use in ternary bit nonvolatile memory devices.

Original language	English
Article number	094111
Journal	Journal of Applied Physics
Volume	101
Issue number	9
DOIs	https://doi.org/10.1063/1.2730572
State	Published - 2007

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title = "Ferroelectric and magnetic properties of CdMnS films prepared by coevaporation",

abstract = "We report on impurity ferroelectricity and ferromagnetic properties in semiconductor-structured CdMnS films. We observed ferroelectric hysteresis in CdMnS. A remnant polarization of 1.72 μC/ cm2 and a coercive field of 14.3 kV/cm were obtained in samples with Mn concentration below 2%. The coevaporated CdMnS samples become ferromagnetic when doped with Au, with a spontaneous magnetization of 1.39× 10-6 emu and a coercive magnetic field of 75.4 gauss at 10 K, and the Curie point was found to be higher than room temperature. Through magnetic force microscopy, we observed clear magnetic clusters with sizes ranging from a few nanometers to 102 nm, and found the magnetization to be highly dependent on Au concentration. A combination of this ferroelectricity in CdMnS and ferromagnetism in Au-doped CdMnS may find use in ternary bit nonvolatile memory devices.",

author = "Kim, {D. H.} and Lee, {D. J.} and Kim, {N. M.} and Lee, {S. J.} and Kang, {T. W.} and Woo, {Y. D.} and Fu, {D. J.}",

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T1 - Ferroelectric and magnetic properties of CdMnS films prepared by coevaporation

AU - Kim, D. H.

AU - Lee, D. J.

AU - Kim, N. M.

AU - Lee, S. J.

AU - Kang, T. W.

AU - Woo, Y. D.

AU - Fu, D. J.

PY - 2007

Y1 - 2007

N2 - We report on impurity ferroelectricity and ferromagnetic properties in semiconductor-structured CdMnS films. We observed ferroelectric hysteresis in CdMnS. A remnant polarization of 1.72 μC/ cm2 and a coercive field of 14.3 kV/cm were obtained in samples with Mn concentration below 2%. The coevaporated CdMnS samples become ferromagnetic when doped with Au, with a spontaneous magnetization of 1.39× 10-6 emu and a coercive magnetic field of 75.4 gauss at 10 K, and the Curie point was found to be higher than room temperature. Through magnetic force microscopy, we observed clear magnetic clusters with sizes ranging from a few nanometers to 102 nm, and found the magnetization to be highly dependent on Au concentration. A combination of this ferroelectricity in CdMnS and ferromagnetism in Au-doped CdMnS may find use in ternary bit nonvolatile memory devices.

AB - We report on impurity ferroelectricity and ferromagnetic properties in semiconductor-structured CdMnS films. We observed ferroelectric hysteresis in CdMnS. A remnant polarization of 1.72 μC/ cm2 and a coercive field of 14.3 kV/cm were obtained in samples with Mn concentration below 2%. The coevaporated CdMnS samples become ferromagnetic when doped with Au, with a spontaneous magnetization of 1.39× 10-6 emu and a coercive magnetic field of 75.4 gauss at 10 K, and the Curie point was found to be higher than room temperature. Through magnetic force microscopy, we observed clear magnetic clusters with sizes ranging from a few nanometers to 102 nm, and found the magnetization to be highly dependent on Au concentration. A combination of this ferroelectricity in CdMnS and ferromagnetism in Au-doped CdMnS may find use in ternary bit nonvolatile memory devices.

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VL - 101

JO - Journal of Applied Physics

JF - Journal of Applied Physics

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ER -

Ferroelectric and magnetic properties of CdMnS films prepared by coevaporation

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