Ferromagnetism below 10 k in Mn-doped BiTe

Jan-Willem G Bos; M Lee; E Morosan; H W Zandbergen; W L Lee; N P Ong; R J Cava

doi:10.1103/PhysRevB.74.184429

Ferromagnetism below 10 k in Mn-doped BiTe

Jan-Willem G Bos, M Lee, E Morosan, H W Zandbergen, W L Lee, N P Ong, R J Cava

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

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Abstract

Ferromagnetism is observed below 10 K in [Bi0.75Te0.125Mn0.125]Te. This material has the BiTe structure, which is made from the stacking of two Te-Bi-Te-Bi-Te blocks and one Bi-Bi block per unit cell. Crystal structure analysis shows that Mn is localized in the Bi-2 blocks, and is accompanied by an equal amount of Te-Bi antisite occupancy in the Bi2Te3 blocks. These Te-Bi antisite defects greatly enhance the Mn solubility. This is demonstrated by comparison of the [Bi1-xMnx]Te and [Bi1-2xTexMnx]Te series; in the former, the solubility is limited to x=0.067, while the latter has x(max)=0.125. The magnetism in [Bi1-xMnx]Te changes little with x, while that for [Bi1-2xTexMnx]Te shows a clear variation, leading to ferromagnetism for x>0.067. Magnetic hysteresis and the anomalous Hall effect are observed for the ferromagnetic samples.

Original language	English
Article number	184429
Number of pages	7
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	74
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.74.184429
Publication status	Published - 1 Nov 2006

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title = "Ferromagnetism below 10 k in Mn-doped BiTe",

abstract = "Ferromagnetism is observed below 10 K in [Bi0.75Te0.125Mn0.125]Te. This material has the BiTe structure, which is made from the stacking of two Te-Bi-Te-Bi-Te blocks and one Bi-Bi block per unit cell. Crystal structure analysis shows that Mn is localized in the Bi-2 blocks, and is accompanied by an equal amount of Te-Bi antisite occupancy in the Bi2Te3 blocks. These Te-Bi antisite defects greatly enhance the Mn solubility. This is demonstrated by comparison of the [Bi1-xMnx]Te and [Bi1-2xTexMnx]Te series; in the former, the solubility is limited to x=0.067, while the latter has x(max)=0.125. The magnetism in [Bi1-xMnx]Te changes little with x, while that for [Bi1-2xTexMnx]Te shows a clear variation, leading to ferromagnetism for x>0.067. Magnetic hysteresis and the anomalous Hall effect are observed for the ferromagnetic samples.",

author = "Bos, {Jan-Willem G} and M Lee and E Morosan and Zandbergen, {H W} and Lee, {W L} and Ong, {N P} and Cava, {R J}",

year = "2006",

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doi = "10.1103/PhysRevB.74.184429",

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T1 - Ferromagnetism below 10 k in Mn-doped BiTe

AU - Bos, Jan-Willem G

AU - Lee, M

AU - Morosan, E

AU - Zandbergen, H W

AU - Lee, W L

AU - Ong, N P

AU - Cava, R J

PY - 2006/11/1

Y1 - 2006/11/1

N2 - Ferromagnetism is observed below 10 K in [Bi0.75Te0.125Mn0.125]Te. This material has the BiTe structure, which is made from the stacking of two Te-Bi-Te-Bi-Te blocks and one Bi-Bi block per unit cell. Crystal structure analysis shows that Mn is localized in the Bi-2 blocks, and is accompanied by an equal amount of Te-Bi antisite occupancy in the Bi2Te3 blocks. These Te-Bi antisite defects greatly enhance the Mn solubility. This is demonstrated by comparison of the [Bi1-xMnx]Te and [Bi1-2xTexMnx]Te series; in the former, the solubility is limited to x=0.067, while the latter has x(max)=0.125. The magnetism in [Bi1-xMnx]Te changes little with x, while that for [Bi1-2xTexMnx]Te shows a clear variation, leading to ferromagnetism for x>0.067. Magnetic hysteresis and the anomalous Hall effect are observed for the ferromagnetic samples.

AB - Ferromagnetism is observed below 10 K in [Bi0.75Te0.125Mn0.125]Te. This material has the BiTe structure, which is made from the stacking of two Te-Bi-Te-Bi-Te blocks and one Bi-Bi block per unit cell. Crystal structure analysis shows that Mn is localized in the Bi-2 blocks, and is accompanied by an equal amount of Te-Bi antisite occupancy in the Bi2Te3 blocks. These Te-Bi antisite defects greatly enhance the Mn solubility. This is demonstrated by comparison of the [Bi1-xMnx]Te and [Bi1-2xTexMnx]Te series; in the former, the solubility is limited to x=0.067, while the latter has x(max)=0.125. The magnetism in [Bi1-xMnx]Te changes little with x, while that for [Bi1-2xTexMnx]Te shows a clear variation, leading to ferromagnetism for x>0.067. Magnetic hysteresis and the anomalous Hall effect are observed for the ferromagnetic samples.

U2 - 10.1103/PhysRevB.74.184429

DO - 10.1103/PhysRevB.74.184429

M3 - Article

SN - 1098-0121

VL - 74

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

IS - 18

M1 - 184429

ER -

Ferromagnetism below 10 k in Mn-doped BiTe

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