Magnetic moments and spin structure in single-phase B20 Co1+xSi1-x(x = 0.043)

Haohan Wang; Balamurugan Balasubramanian; Yaohua Liu; Robert Streubel; Rabindra Pahari; Thilini Kumari Ekanayaka; Esha Mishra; Christoph Klewe; Padraic Shafer; Rohan Dhall; Ralph Skomski; David J. Sellmyer; Xiaoshan Xu

doi:10.1063/5.0090545

Magnetic moments and spin structure in single-phase B20 Co_1+xSi_1-x(x = 0.043)

Haohan Wang, Balamurugan Balasubramanian, Yaohua Liu, Robert Streubel, Rabindra Pahari, Thilini Kumari Ekanayaka, Esha Mishra, Christoph Klewe, Padraic Shafer, Rohan Dhall, Ralph Skomski, David J. Sellmyer, Xiaoshan Xu

Physics and Astronomy

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

Abstract

Neutron powder diffraction (NPD) and x-ray magnetic circular dichroism (XMCD) spectroscopy are employed to investigate the magnetism and spin structure in single-phase B20 Co1.043Si0.957. The magnetic contributions to the NPD data measured in zero fields are consistent with the helical order among the allowed spin structures derived from group theory. The magnitude of the magnetic moment is (0.3 ± 0.1)μB/Co according to NPD, while the surface magnetization probed by XMCD at 3 kOe is (0.18-0.31)μB/Co. Both values are substantially larger than the bulk magnetization of 0.11μB/Co determined from magnetometry at 70 kOe and 2 K. These experimental data indicate the formation of a helical spin phase and the associated conical states in high magnetic fields.

Original language	English (US)
Article number	183902
Journal	Journal of Applied Physics
Volume	131
Issue number	18
DOIs	https://doi.org/10.1063/5.0090545
State	Published - May 14 2022

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General Physics and Astronomy

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10.1063/5.0090545

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@article{74fd89cf83764e99a9e6a0801b434c56,

title = "Magnetic moments and spin structure in single-phase B20 Co1+xSi1-x(x = 0.043)",

abstract = "Neutron powder diffraction (NPD) and x-ray magnetic circular dichroism (XMCD) spectroscopy are employed to investigate the magnetism and spin structure in single-phase B20 Co1.043Si0.957. The magnetic contributions to the NPD data measured in zero fields are consistent with the helical order among the allowed spin structures derived from group theory. The magnitude of the magnetic moment is (0.3 ± 0.1)μB/Co according to NPD, while the surface magnetization probed by XMCD at 3 kOe is (0.18-0.31)μB/Co. Both values are substantially larger than the bulk magnetization of 0.11μB/Co determined from magnetometry at 70 kOe and 2 K. These experimental data indicate the formation of a helical spin phase and the associated conical states in high magnetic fields.",

author = "Haohan Wang and Balamurugan Balasubramanian and Yaohua Liu and Robert Streubel and Rabindra Pahari and Ekanayaka, {Thilini Kumari} and Esha Mishra and Christoph Klewe and Padraic Shafer and Rohan Dhall and Ralph Skomski and Sellmyer, {David J.} and Xiaoshan Xu",

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month = may,

day = "14",

doi = "10.1063/5.0090545",

language = "English (US)",

volume = "131",

journal = "Journal of Applied Physics",

issn = "0021-8979",

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TY - JOUR

T1 - Magnetic moments and spin structure in single-phase B20 Co1+xSi1-x(x = 0.043)

AU - Wang, Haohan

AU - Balasubramanian, Balamurugan

AU - Liu, Yaohua

AU - Streubel, Robert

AU - Pahari, Rabindra

AU - Ekanayaka, Thilini Kumari

AU - Mishra, Esha

AU - Klewe, Christoph

AU - Shafer, Padraic

AU - Dhall, Rohan

AU - Skomski, Ralph

AU - Sellmyer, David J.

AU - Xu, Xiaoshan

PY - 2022/5/14

Y1 - 2022/5/14

N2 - Neutron powder diffraction (NPD) and x-ray magnetic circular dichroism (XMCD) spectroscopy are employed to investigate the magnetism and spin structure in single-phase B20 Co1.043Si0.957. The magnetic contributions to the NPD data measured in zero fields are consistent with the helical order among the allowed spin structures derived from group theory. The magnitude of the magnetic moment is (0.3 ± 0.1)μB/Co according to NPD, while the surface magnetization probed by XMCD at 3 kOe is (0.18-0.31)μB/Co. Both values are substantially larger than the bulk magnetization of 0.11μB/Co determined from magnetometry at 70 kOe and 2 K. These experimental data indicate the formation of a helical spin phase and the associated conical states in high magnetic fields.

AB - Neutron powder diffraction (NPD) and x-ray magnetic circular dichroism (XMCD) spectroscopy are employed to investigate the magnetism and spin structure in single-phase B20 Co1.043Si0.957. The magnetic contributions to the NPD data measured in zero fields are consistent with the helical order among the allowed spin structures derived from group theory. The magnitude of the magnetic moment is (0.3 ± 0.1)μB/Co according to NPD, while the surface magnetization probed by XMCD at 3 kOe is (0.18-0.31)μB/Co. Both values are substantially larger than the bulk magnetization of 0.11μB/Co determined from magnetometry at 70 kOe and 2 K. These experimental data indicate the formation of a helical spin phase and the associated conical states in high magnetic fields.

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VL - 131

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JF - Journal of Applied Physics

IS - 18

M1 - 183902

ER -

Magnetic moments and spin structure in single-phase B20 Co_1+xSi_1-x(x = 0.043)

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