Above-room-temperature ferromagnetism in GaSb/Mn digital alloys

X. Chen; M. Na; M. Cheon; S. Wang; H. Luo; B. D. McCombe; X. Liu; Y. Sasaki; T. Wojtowicz; J. K. Furdyna; S. J. Potashnik; P. Schiffer

doi:10.1063/1.1481184

Above-room-temperature ferromagnetism in GaSb/Mn digital alloys

X. Chen, M. Na, M. Cheon, S. Wang, H. Luo, B. D. McCombe, X. Liu, Y. Sasaki, T. Wojtowicz, J. K. Furdyna, S. J. Potashnik, P. Schiffer

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124 Scopus citations

Abstract

Digital alloys of GaSb/Mn have been fabricated by molecular-beam epitaxy. Transmission electron micrographs showed good crystal quality with individual Mn-containing layers well resolved, no evidence of three-dimensional MnSb precipitates was seen in as-grown samples. All samples studied exhibited ferromagnetism with temperature-dependent hysteresis loops in the magnetization accompanied by metallic p-type conductivity with a strong anomalous Hall effect (AHE) up to 400 K (limited by the experimental setup). The anomalous Hall effect shows hysteresis loops at low temperatures and above room temperature very similar to those seen in the magnetization. The strong AHE with hysteresis indicates that the holes interact with the Mn spins above room temperature. All samples are metallic, which is important for spintronics applications.

Original language	English (US)
Pages (from-to)	511-513
Number of pages	3
Journal	Applied Physics Letters
Volume	81
Issue number	3
DOIs	https://doi.org/10.1063/1.1481184
State	Published - Jul 15 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1481184

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title = "Above-room-temperature ferromagnetism in GaSb/Mn digital alloys",

abstract = "Digital alloys of GaSb/Mn have been fabricated by molecular-beam epitaxy. Transmission electron micrographs showed good crystal quality with individual Mn-containing layers well resolved, no evidence of three-dimensional MnSb precipitates was seen in as-grown samples. All samples studied exhibited ferromagnetism with temperature-dependent hysteresis loops in the magnetization accompanied by metallic p-type conductivity with a strong anomalous Hall effect (AHE) up to 400 K (limited by the experimental setup). The anomalous Hall effect shows hysteresis loops at low temperatures and above room temperature very similar to those seen in the magnetization. The strong AHE with hysteresis indicates that the holes interact with the Mn spins above room temperature. All samples are metallic, which is important for spintronics applications.",

author = "X. Chen and M. Na and M. Cheon and S. Wang and H. Luo and McCombe, {B. D.} and X. Liu and Y. Sasaki and T. Wojtowicz and Furdyna, {J. K.} and Potashnik, {S. J.} and P. Schiffer",

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doi = "10.1063/1.1481184",

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volume = "81",

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TY - JOUR

T1 - Above-room-temperature ferromagnetism in GaSb/Mn digital alloys

AU - Chen, X.

AU - Na, M.

AU - Cheon, M.

AU - Wang, S.

AU - Luo, H.

AU - McCombe, B. D.

AU - Liu, X.

AU - Sasaki, Y.

AU - Wojtowicz, T.

AU - Furdyna, J. K.

AU - Potashnik, S. J.

AU - Schiffer, P.

PY - 2002/7/15

Y1 - 2002/7/15

N2 - Digital alloys of GaSb/Mn have been fabricated by molecular-beam epitaxy. Transmission electron micrographs showed good crystal quality with individual Mn-containing layers well resolved, no evidence of three-dimensional MnSb precipitates was seen in as-grown samples. All samples studied exhibited ferromagnetism with temperature-dependent hysteresis loops in the magnetization accompanied by metallic p-type conductivity with a strong anomalous Hall effect (AHE) up to 400 K (limited by the experimental setup). The anomalous Hall effect shows hysteresis loops at low temperatures and above room temperature very similar to those seen in the magnetization. The strong AHE with hysteresis indicates that the holes interact with the Mn spins above room temperature. All samples are metallic, which is important for spintronics applications.

AB - Digital alloys of GaSb/Mn have been fabricated by molecular-beam epitaxy. Transmission electron micrographs showed good crystal quality with individual Mn-containing layers well resolved, no evidence of three-dimensional MnSb precipitates was seen in as-grown samples. All samples studied exhibited ferromagnetism with temperature-dependent hysteresis loops in the magnetization accompanied by metallic p-type conductivity with a strong anomalous Hall effect (AHE) up to 400 K (limited by the experimental setup). The anomalous Hall effect shows hysteresis loops at low temperatures and above room temperature very similar to those seen in the magnetization. The strong AHE with hysteresis indicates that the holes interact with the Mn spins above room temperature. All samples are metallic, which is important for spintronics applications.

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EP - 513

JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

Above-room-temperature ferromagnetism in GaSb/Mn digital alloys

Abstract

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