Magnetic properties of Fe-substituted NiBr2 single crystals

Binod K. Rai; Shang Gao; Matthias Frontzek; Yaohua Liu; Andrew D. Christianson; Andrew F. May

doi:10.1016/j.jmmm.2022.169452

Magnetic properties of Fe-substituted NiBr₂ single crystals

Binod K. Rai, Shang Gao, Matthias Frontzek, Yaohua Liu, Andrew D. Christianson, Andrew F. May

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

Abstract

NiBr₂ is a multiferroic material with an incommensurate magnetic ground state that has easy-plane anisotropy. This manuscript reports how the magnetic properties evolve with Fe substitution in Ni_1−xFe_xBr₂ single crystals for 0 ≤x≤ 0.17. A particular emphasis is placed on the x = 0.055 crystal, for which Hvs.T magnetic phase diagrams were developed on the basis of anisotropic magnetization measurements. The observed phase evolution reveals a phase transition in the x = 0.055 crystal that is not present in NiBr₂. The data also demonstrate that the easy-plane anisotropy of NiBr₂ is altered by Fe substitution, with a finite easy-axis anisotropy developing at even the low concentration of x = 0.055. These results demonstrate that Fe substitution enables a fine-tuning of the magnetism in NiBr₂, especially the magnetic anisotropy, and may therefore promote complex magnetic phases.

Original language	English
Article number	169452
Journal	Journal of Magnetism and Magnetic Materials
Volume	557
DOIs	https://doi.org/10.1016/j.jmmm.2022.169452
State	Published - Sep 1 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

Funding

We thank D. Mandrus, C. Batista and S. Lin for useful discussions. This research was supported by the U.S. Department of Energy , Office of Science , Basic Energy Sciences , Materials Science and Engineering Division . Work at the Savannah River National Laboratory was supported by the Laboratory Directed Research and Development (LDRD) program . Work at the Oak Ridge National Laboratory Spallation Neutron Source was supported by U.S. DOE , Office of Science , BES , Scientific User Facilities Division . This research used resources of the Spallation Neutron Source Second Target Station Project at Oak Ridge National Laboratory (ORNL).

Funders	Funder number
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Oak Ridge National Laboratory
Laboratory Directed Research and Development
Division of Materials Sciences and Engineering

Keywords

Anisotropy
Helical
Incommensurate
Transition metal halide
van der Waals

Access to Document

10.1016/j.jmmm.2022.169452

Cite this

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abstract = "NiBr2 is a multiferroic material with an incommensurate magnetic ground state that has easy-plane anisotropy. This manuscript reports how the magnetic properties evolve with Fe substitution in Ni1−xFexBr2 single crystals for 0 ≤x≤ 0.17. A particular emphasis is placed on the x = 0.055 crystal, for which Hvs.T magnetic phase diagrams were developed on the basis of anisotropic magnetization measurements. The observed phase evolution reveals a phase transition in the x = 0.055 crystal that is not present in NiBr2. The data also demonstrate that the easy-plane anisotropy of NiBr2 is altered by Fe substitution, with a finite easy-axis anisotropy developing at even the low concentration of x = 0.055. These results demonstrate that Fe substitution enables a fine-tuning of the magnetism in NiBr2, especially the magnetic anisotropy, and may therefore promote complex magnetic phases.",

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T1 - Magnetic properties of Fe-substituted NiBr2 single crystals

AU - Rai, Binod K.

AU - Gao, Shang

AU - Frontzek, Matthias

AU - Liu, Yaohua

AU - Christianson, Andrew D.

AU - May, Andrew F.

PY - 2022/9/1

Y1 - 2022/9/1

N2 - NiBr2 is a multiferroic material with an incommensurate magnetic ground state that has easy-plane anisotropy. This manuscript reports how the magnetic properties evolve with Fe substitution in Ni1−xFexBr2 single crystals for 0 ≤x≤ 0.17. A particular emphasis is placed on the x = 0.055 crystal, for which Hvs.T magnetic phase diagrams were developed on the basis of anisotropic magnetization measurements. The observed phase evolution reveals a phase transition in the x = 0.055 crystal that is not present in NiBr2. The data also demonstrate that the easy-plane anisotropy of NiBr2 is altered by Fe substitution, with a finite easy-axis anisotropy developing at even the low concentration of x = 0.055. These results demonstrate that Fe substitution enables a fine-tuning of the magnetism in NiBr2, especially the magnetic anisotropy, and may therefore promote complex magnetic phases.

AB - NiBr2 is a multiferroic material with an incommensurate magnetic ground state that has easy-plane anisotropy. This manuscript reports how the magnetic properties evolve with Fe substitution in Ni1−xFexBr2 single crystals for 0 ≤x≤ 0.17. A particular emphasis is placed on the x = 0.055 crystal, for which Hvs.T magnetic phase diagrams were developed on the basis of anisotropic magnetization measurements. The observed phase evolution reveals a phase transition in the x = 0.055 crystal that is not present in NiBr2. The data also demonstrate that the easy-plane anisotropy of NiBr2 is altered by Fe substitution, with a finite easy-axis anisotropy developing at even the low concentration of x = 0.055. These results demonstrate that Fe substitution enables a fine-tuning of the magnetism in NiBr2, especially the magnetic anisotropy, and may therefore promote complex magnetic phases.

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