Non-monotonic dependence of the anomalous Hall coefficient scaling parameter in annealed Ga1-xMnxAs epifilms

H. K. Choi; W. O. Lee; Y. S. Oh; K. H. Kim; Y. D. Park

doi:10.1016/j.jmmm.2006.10.935

Non-monotonic dependence of the anomalous Hall coefficient scaling parameter in annealed Ga_1-xMn_xAs epifilms

H. K. Choi
, W. O. Lee
, Y. S. Oh
, K. H. Kim
, Y. D. Park^*

^*Corresponding author for this work

Department of Physics

Seoul National University

Research output: Contribution to journal › Journal article › peer-review

Abstract

When plotting the anomalous Hall coefficient (R_s) and longitudinal resistivty (ρ_xx) for a series of annealed Ga_1-xMn_xAs epilayers (x≈0.055), we find the value of the scaling parameter n, from R_S=cρ_xxⁿ, to range from one, as-grown, to two at an optimal annealing temperature to values greater than three for higher annealing temperatures, similar behavior to certain inhomogeneous systems. This scaling relationship can be a new method to detect secondary phases in ferromagnetic semiconductor systems.

Original language	English
Pages (from-to)	2129-2131
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 3
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.935
State	Published - 2007.03

Keywords

Anomalous Hall coefficient
Anomalous Hall effect
Diluted magnetic semiconductors
GaMnAs
Scaling parameter

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10.1016/j.jmmm.2006.10.935

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title = "Non-monotonic dependence of the anomalous Hall coefficient scaling parameter in annealed Ga1-xMnxAs epifilms",

abstract = "When plotting the anomalous Hall coefficient (Rs) and longitudinal resistivty (ρxx) for a series of annealed Ga1-xMnxAs epilayers (x≈0.055), we find the value of the scaling parameter n, from RS=cρxxn, to range from one, as-grown, to two at an optimal annealing temperature to values greater than three for higher annealing temperatures, similar behavior to certain inhomogeneous systems. This scaling relationship can be a new method to detect secondary phases in ferromagnetic semiconductor systems.",

keywords = "Anomalous Hall coefficient, Anomalous Hall effect, Diluted magnetic semiconductors, GaMnAs, Scaling parameter",

author = "Choi, \{H. K.\} and Lee, \{W. O.\} and Oh, \{Y. S.\} and Kim, \{K. H.\} and Park, \{Y. D.\}",

year = "2007",

month = mar,

doi = "10.1016/j.jmmm.2006.10.935",

language = "English",

volume = "310",

pages = "2129--2131",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

number = "2 SUPPL. PART 3",

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TY - JOUR

T1 - Non-monotonic dependence of the anomalous Hall coefficient scaling parameter in annealed Ga1-xMnxAs epifilms

AU - Choi, H. K.

AU - Lee, W. O.

AU - Oh, Y. S.

AU - Kim, K. H.

AU - Park, Y. D.

PY - 2007/3

Y1 - 2007/3

N2 - When plotting the anomalous Hall coefficient (Rs) and longitudinal resistivty (ρxx) for a series of annealed Ga1-xMnxAs epilayers (x≈0.055), we find the value of the scaling parameter n, from RS=cρxxn, to range from one, as-grown, to two at an optimal annealing temperature to values greater than three for higher annealing temperatures, similar behavior to certain inhomogeneous systems. This scaling relationship can be a new method to detect secondary phases in ferromagnetic semiconductor systems.

AB - When plotting the anomalous Hall coefficient (Rs) and longitudinal resistivty (ρxx) for a series of annealed Ga1-xMnxAs epilayers (x≈0.055), we find the value of the scaling parameter n, from RS=cρxxn, to range from one, as-grown, to two at an optimal annealing temperature to values greater than three for higher annealing temperatures, similar behavior to certain inhomogeneous systems. This scaling relationship can be a new method to detect secondary phases in ferromagnetic semiconductor systems.

KW - Anomalous Hall coefficient

KW - Anomalous Hall effect

KW - Diluted magnetic semiconductors

KW - GaMnAs

KW - Scaling parameter

UR - https://www.scopus.com/pages/publications/33847608718

U2 - 10.1016/j.jmmm.2006.10.935

DO - 10.1016/j.jmmm.2006.10.935

M3 - Journal article

AN - SCOPUS:33847608718

SN - 0304-8853

VL - 310

SP - 2129

EP - 2131

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2 SUPPL. PART 3

ER -

Non-monotonic dependence of the anomalous Hall coefficient scaling parameter in annealed Ga_1-xMn_xAs epifilms

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Keywords

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