Transport and magnetic properties of ferromagnetic GaAs/Mn digital alloys

H. Luo; B. D. McCombe; M. H. Na; K. Mooney; F. Lehmann; X. Chen; M. Cheon; S. M. Wang; Y. Sasaki; X. Liu; J. K. Furdyna

doi:10.1016/S1386-9477(01)00279-X

Transport and magnetic properties of ferromagnetic GaAs/Mn digital alloys

H. Luo
, B. D. McCombe
, M. H. Na
, K. Mooney
, F. Lehmann
, X. Chen
, M. Cheon
, S. M. Wang
, Y. Sasaki
, X. Liu
, J. K. Furdyna

Physics

SUNY Buffalo
University of Notre Dame

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

26 Scopus citations

Abstract

Magnetic and transport properties of two-dimensional (2D) Mn layers in GaAs/Mn digital alloys have been determined as a function of Mn layer coverage. Ferromagnetism was observed in samples having more than 10% Mn in each Mn-containing layer. The Curie temperature showed a strong correlation with the effective spin density in the digital alloy samples. Magnetotransport studies revealed activated behavior hole conductivity consistent with variable range hopping in two dimensions. The general features of magnetoresistance and the anomalous Hall effect are similar to those seen in metallic ferromagnetic GaMnAs. However, the temperature dependence of the observed negative magnetoresistance follows the pattern seen in insulating ferromagnetic GaMnAs.

Original language	English
Pages (from-to)	366-369
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	12
Issue number	1-4
DOIs	https://doi.org/10.1016/S1386-9477(01)00279-X
State	Published - Jan 2002
Event	14th International Conference on the - Prague, Czech Republic Duration: Jul 30 2001 → Aug 3 2001

Keywords

Magnetic semiconductors
Spintronics

Access to Document

10.1016/S1386-9477(01)00279-X

Cite this

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title = "Transport and magnetic properties of ferromagnetic GaAs/Mn digital alloys",

abstract = "Magnetic and transport properties of two-dimensional (2D) Mn layers in GaAs/Mn digital alloys have been determined as a function of Mn layer coverage. Ferromagnetism was observed in samples having more than 10\% Mn in each Mn-containing layer. The Curie temperature showed a strong correlation with the effective spin density in the digital alloy samples. Magnetotransport studies revealed activated behavior hole conductivity consistent with variable range hopping in two dimensions. The general features of magnetoresistance and the anomalous Hall effect are similar to those seen in metallic ferromagnetic GaMnAs. However, the temperature dependence of the observed negative magnetoresistance follows the pattern seen in insulating ferromagnetic GaMnAs.",

keywords = "Magnetic semiconductors, Spintronics",

author = "H. Luo and McCombe, \{B. D.\} and Na, \{M. H.\} and K. Mooney and F. Lehmann and X. Chen and M. Cheon and Wang, \{S. M.\} and Y. Sasaki and X. Liu and Furdyna, \{J. K.\}",

year = "2002",

month = jan,

doi = "10.1016/S1386-9477(01)00279-X",

language = "English",

volume = "12",

pages = "366--369",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier B.V.",

number = "1-4",

note = "14th International Conference on the ; Conference date: 30-07-2001 Through 03-08-2001",

}

TY - JOUR

T1 - Transport and magnetic properties of ferromagnetic GaAs/Mn digital alloys

AU - Luo, H.

AU - McCombe, B. D.

AU - Na, M. H.

AU - Mooney, K.

AU - Lehmann, F.

AU - Chen, X.

AU - Cheon, M.

AU - Wang, S. M.

AU - Sasaki, Y.

AU - Liu, X.

AU - Furdyna, J. K.

PY - 2002/1

Y1 - 2002/1

N2 - Magnetic and transport properties of two-dimensional (2D) Mn layers in GaAs/Mn digital alloys have been determined as a function of Mn layer coverage. Ferromagnetism was observed in samples having more than 10% Mn in each Mn-containing layer. The Curie temperature showed a strong correlation with the effective spin density in the digital alloy samples. Magnetotransport studies revealed activated behavior hole conductivity consistent with variable range hopping in two dimensions. The general features of magnetoresistance and the anomalous Hall effect are similar to those seen in metallic ferromagnetic GaMnAs. However, the temperature dependence of the observed negative magnetoresistance follows the pattern seen in insulating ferromagnetic GaMnAs.

AB - Magnetic and transport properties of two-dimensional (2D) Mn layers in GaAs/Mn digital alloys have been determined as a function of Mn layer coverage. Ferromagnetism was observed in samples having more than 10% Mn in each Mn-containing layer. The Curie temperature showed a strong correlation with the effective spin density in the digital alloy samples. Magnetotransport studies revealed activated behavior hole conductivity consistent with variable range hopping in two dimensions. The general features of magnetoresistance and the anomalous Hall effect are similar to those seen in metallic ferromagnetic GaMnAs. However, the temperature dependence of the observed negative magnetoresistance follows the pattern seen in insulating ferromagnetic GaMnAs.

KW - Magnetic semiconductors

KW - Spintronics

UR - https://www.scopus.com/pages/publications/0035239594

U2 - 10.1016/S1386-9477(01)00279-X

DO - 10.1016/S1386-9477(01)00279-X

M3 - Conference article

AN - SCOPUS:0035239594

SN - 1386-9477

VL - 12

SP - 366

EP - 369

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-4

T2 - 14th International Conference on the

Y2 - 30 July 2001 through 3 August 2001

ER -

Transport and magnetic properties of ferromagnetic GaAs/Mn digital alloys

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Keywords

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