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

STS Project Technical Systems

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
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

Funding

This work was supported by NSF-DMREF SusChEM No. 1729288 (sample fabrication and neutron diffraction studies), NSF-EPSCoR EQUATE OIA-2044049 (theoretical analysis), Nebraska EPSCoR FIRST OIA-1557417 (x-ray absorption spectroscopy), and the Nebraska Center for Materials and Nanoscience. We thank Qiang Zhang from the Oak Ridge National Laboratory for his help on neutron measurement. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, the Advanced Light Source, and the Molecular Foundry, a DOE Office of Science User Facility under Contract No. DE-AC02-05CH11231. This work was performed in part in the Nebraska Nanoscale Facility and Nebraska Center for Materials and Nanoscience, which are supported by the National Science Foundation under Award No. ECCS: 2025298, and the Nebraska Research Initiative.

Funders	Funder number
NSF-DMREF	1729288
NSF-EPSCoR	EQUATE OIA-2044049
Nebraska EPSCoR FIRST	OIA-1557417
National Science Foundation	2025298
Office of Science	DE-AC02-05CH11231
Oak Ridge National Laboratory
Advanced Light Source

Access to Document

10.1063/5.0090545

Cite this

@article{d5deb85664c34fc49506dab9bf02754d,

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",

note = "Publisher Copyright: {\textcopyright} 2022 Author(s).",

year = "2022",

month = may,

day = "14",

doi = "10.1063/5.0090545",

language = "English",

volume = "131",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "18",

}

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.

UR - http://www.scopus.com/inward/record.url?scp=85130265078&partnerID=8YFLogxK

U2 - 10.1063/5.0090545

DO - 10.1063/5.0090545

M3 - Article

AN - SCOPUS:85130265078

SN - 0021-8979

VL - 131

JO - Journal of Applied Physics

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)

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this