Magnetic and electrical properties of random and digital alloys of GaSb:Mn

G. B. Kim; M. Cheon; S. Wang; H. Luo; B. D. McCombe

doi:10.1007/s10948-005-2156-6

Magnetic and electrical properties of random and digital alloys of GaSb:Mn

G. B. Kim
, M. Cheon
, S. Wang
, H. Luo
, B. D. McCombe

Physics

SUNY Buffalo

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We have investigated the effect of Sb/Ga flux ratio on the magnetic and electronic properties of Mn-incorporated GaSb random and digital alloys grown by low-temperature molecular beam epitaxy. The magnetic and magnetotransport properties of Ga_1-xMn_xSb random alloys are strongly dependent on Sb/Ga flux ratio. Clear square-like hysteresis loops were observed for Sb/Ga flux ratios between 4.60 and 5.25. The coercive field and negative magnetoresistance increase with decreasing Sb/Ga flux ratio, while the Curie temperature remains constant at approximately 23 K, with no systematic dependence on the hole density. In contrast, the Curie temperatures for the GaSb:Mn digital alloys with different Mn surface coverages depend significantly on the Sb/Ga flux ratio, and it is also directly correlated with the hole density.

Original language	English
Pages (from-to)	87-92
Number of pages	6
Journal	Journal of Superconductivity and Novel Magnetism
Volume	18
Issue number	1
DOIs	https://doi.org/10.1007/s10948-005-2156-6
State	Published - 2005

Keywords

GaMnSb random alloys
GaSb:Mn digital alloys
MBE
Sb/Ga flux ratio

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10.1007/s10948-005-2156-6

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title = "Magnetic and electrical properties of random and digital alloys of GaSb:Mn",

abstract = "We have investigated the effect of Sb/Ga flux ratio on the magnetic and electronic properties of Mn-incorporated GaSb random and digital alloys grown by low-temperature molecular beam epitaxy. The magnetic and magnetotransport properties of Ga1-xMnxSb random alloys are strongly dependent on Sb/Ga flux ratio. Clear square-like hysteresis loops were observed for Sb/Ga flux ratios between 4.60 and 5.25. The coercive field and negative magnetoresistance increase with decreasing Sb/Ga flux ratio, while the Curie temperature remains constant at approximately 23 K, with no systematic dependence on the hole density. In contrast, the Curie temperatures for the GaSb:Mn digital alloys with different Mn surface coverages depend significantly on the Sb/Ga flux ratio, and it is also directly correlated with the hole density.",

keywords = "GaMnSb random alloys, GaSb:Mn digital alloys, MBE, Sb/Ga flux ratio",

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TY - JOUR

T1 - Magnetic and electrical properties of random and digital alloys of GaSb:Mn

AU - Kim, G. B.

AU - Cheon, M.

AU - Wang, S.

AU - Luo, H.

AU - McCombe, B. D.

PY - 2005

Y1 - 2005

N2 - We have investigated the effect of Sb/Ga flux ratio on the magnetic and electronic properties of Mn-incorporated GaSb random and digital alloys grown by low-temperature molecular beam epitaxy. The magnetic and magnetotransport properties of Ga1-xMnxSb random alloys are strongly dependent on Sb/Ga flux ratio. Clear square-like hysteresis loops were observed for Sb/Ga flux ratios between 4.60 and 5.25. The coercive field and negative magnetoresistance increase with decreasing Sb/Ga flux ratio, while the Curie temperature remains constant at approximately 23 K, with no systematic dependence on the hole density. In contrast, the Curie temperatures for the GaSb:Mn digital alloys with different Mn surface coverages depend significantly on the Sb/Ga flux ratio, and it is also directly correlated with the hole density.

AB - We have investigated the effect of Sb/Ga flux ratio on the magnetic and electronic properties of Mn-incorporated GaSb random and digital alloys grown by low-temperature molecular beam epitaxy. The magnetic and magnetotransport properties of Ga1-xMnxSb random alloys are strongly dependent on Sb/Ga flux ratio. Clear square-like hysteresis loops were observed for Sb/Ga flux ratios between 4.60 and 5.25. The coercive field and negative magnetoresistance increase with decreasing Sb/Ga flux ratio, while the Curie temperature remains constant at approximately 23 K, with no systematic dependence on the hole density. In contrast, the Curie temperatures for the GaSb:Mn digital alloys with different Mn surface coverages depend significantly on the Sb/Ga flux ratio, and it is also directly correlated with the hole density.

KW - GaMnSb random alloys

KW - GaSb:Mn digital alloys

KW - MBE

KW - Sb/Ga flux ratio

UR - https://www.scopus.com/pages/publications/17444416497

U2 - 10.1007/s10948-005-2156-6

DO - 10.1007/s10948-005-2156-6

M3 - Article

AN - SCOPUS:17444416497

SN - 1557-1939

VL - 18

SP - 87

EP - 92

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 1

ER -

Magnetic and electrical properties of random and digital alloys of GaSb:Mn

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