Enhancement of ferromagnetism in Mn-doped Si via B codoping

Yaping Zhang; Liqing Pan; Hao Zhu; Weigang Wang; Lubna R. Shah; Xin Fan; John Q. Xiao

doi:10.1063/1.3352979

Enhancement of ferromagnetism in Mn-doped Si via B codoping

Yaping Zhang, Liqing Pan, Hao Zhu, Weigang Wang, Lubna R. Shah, Xin Fan, John Q. Xiao

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

4 Scopus citations

Abstract

Room temperature ferromagnetic Mn0.026 B_X Si0.974-X bulk samples with X=0.001, 0.005, and 0.01 were fabricated by arc melting and followed by thermal annealing at 1000 °C. The effects of carrier density on the ferromagnetism were studied. Due to the high carrier densities, all samples showed metallic behavior. Kondo effect was observed when the temperature was below 10 K. Weakly localized carriers monotonously increased with increasing boron concentration, resulting in the enhancement of exchange coupling among Mn ions. The study indicated that the ferromagnetism originates from the hole mediated Ruderman-Kittel-Kasuya-Yosida mechanism.

Original language	English (US)
Article number	09C305
Journal	Journal of Applied Physics
Volume	107
Issue number	9
DOIs	https://doi.org/10.1063/1.3352979
State	Published - May 1 2010
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Enhancement of ferromagnetism in Mn-doped Si via B codoping",

abstract = "Room temperature ferromagnetic Mn0.026 BX Si0.974-X bulk samples with X=0.001, 0.005, and 0.01 were fabricated by arc melting and followed by thermal annealing at 1000 °C. The effects of carrier density on the ferromagnetism were studied. Due to the high carrier densities, all samples showed metallic behavior. Kondo effect was observed when the temperature was below 10 K. Weakly localized carriers monotonously increased with increasing boron concentration, resulting in the enhancement of exchange coupling among Mn ions. The study indicated that the ferromagnetism originates from the hole mediated Ruderman-Kittel-Kasuya-Yosida mechanism.",

author = "Yaping Zhang and Liqing Pan and Hao Zhu and Weigang Wang and Shah, {Lubna R.} and Xin Fan and Xiao, {John Q.}",

note = "Funding Information: The work was supported by DOE Grant No. DE-FG02-07ER46374.",

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doi = "10.1063/1.3352979",

language = "English (US)",

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T1 - Enhancement of ferromagnetism in Mn-doped Si via B codoping

AU - Zhang, Yaping

AU - Pan, Liqing

AU - Zhu, Hao

AU - Wang, Weigang

AU - Shah, Lubna R.

AU - Fan, Xin

AU - Xiao, John Q.

N1 - Funding Information: The work was supported by DOE Grant No. DE-FG02-07ER46374.

PY - 2010/5/1

Y1 - 2010/5/1

N2 - Room temperature ferromagnetic Mn0.026 BX Si0.974-X bulk samples with X=0.001, 0.005, and 0.01 were fabricated by arc melting and followed by thermal annealing at 1000 °C. The effects of carrier density on the ferromagnetism were studied. Due to the high carrier densities, all samples showed metallic behavior. Kondo effect was observed when the temperature was below 10 K. Weakly localized carriers monotonously increased with increasing boron concentration, resulting in the enhancement of exchange coupling among Mn ions. The study indicated that the ferromagnetism originates from the hole mediated Ruderman-Kittel-Kasuya-Yosida mechanism.

AB - Room temperature ferromagnetic Mn0.026 BX Si0.974-X bulk samples with X=0.001, 0.005, and 0.01 were fabricated by arc melting and followed by thermal annealing at 1000 °C. The effects of carrier density on the ferromagnetism were studied. Due to the high carrier densities, all samples showed metallic behavior. Kondo effect was observed when the temperature was below 10 K. Weakly localized carriers monotonously increased with increasing boron concentration, resulting in the enhancement of exchange coupling among Mn ions. The study indicated that the ferromagnetism originates from the hole mediated Ruderman-Kittel-Kasuya-Yosida mechanism.

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Enhancement of ferromagnetism in Mn-doped Si via B codoping

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