Magnetic properties of single crystalline itinerant ferromagnet AlFe2 B2

Tej N. Lamichhane; Li Xiang; Qisheng Lin; Tribhuwan Pandey; David S. Parker; Tae Hoon Kim; Lin Zhou; Matthew J. Kramer; Sergey L. Bud'Ko; Paul C. Canfield

doi:10.1103/PhysRevMaterials.2.084408

Magnetic properties of single crystalline itinerant ferromagnet AlFe2 B2

Tej N. Lamichhane, Li Xiang, Qisheng Lin, Tribhuwan Pandey, David S. Parker, Tae Hoon Kim, Lin Zhou, Matthew J. Kramer, Sergey L. Bud'Ko, Paul C. Canfield

Materials Theory

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

47 Scopus citations

Abstract

Single crystals of AlFe2B2 have been grown using the self-flux growth method, and then we measured the structural properties, temperature- and field-dependent magnetization, and temperature-dependent electrical resistivity at ambient as well as high pressure. The Curie temperature of AlFe2B2 is determined to be 274 K. The measured saturation magnetization and the effective moment for the paramagnetic Fe ion indicate the itinerant nature of the magnetism with a Rhode-Wohlfarth ratio MCMsat≈1.14. Temperature-dependent resistivity measurements under hydrostatic pressure show that transition temperature TC is suppressed down to 255 K for p=2.24 GPa pressure with a suppression rate of ∼-8.9 K/GPa. The anisotropy fields and magnetocrystalline anisotropy constants are in reasonable agreement with density functional theory calculations.

Original language	English
Article number	084408
Journal	Physical Review Materials
Volume	2
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevMaterials.2.084408
State	Published - Aug 20 2018

Funding

This research was supported by the Critical Materials Institute, an Energy Innovation Hub funded by the US Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office. This work was also supported by the office of Basic Energy Sciences, Materials Sciences Division, US DOE. L.X. was supported by the W. M. Keck Foundation. This work was performed at the Ames Laboratory, operated for DOE by Iowa State University under Contract No. DE-AC02-07CH11358. We would like to thank W. R. McCallum and L. H. Lewis for drawing our attention to this compound, and A. Palasyuk for useful discussions. This research was supported by the Critical Materials Institute, an Energy Innovation Hub funded by the US Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office. This work was also supported by the office of Basic Energy Sciences, Materials Sciences Division, US DOE. L.X. was supported by the W. M. Keck Foundation. This work was performed at the Ames Laboratory, operated for DOE by Iowa State University under Contract No. DE-AC02-07CH11358.

Funders	Funder number
Critical Materials Institute
US Department of Energy
U.S. Department of Energy
W. M. Keck Foundation
Advanced Manufacturing Office
Office of Energy Efficiency and Renewable Energy
Basic Energy Sciences
Iowa State University	DE-AC02-07CH11358
Division of Materials Sciences and Engineering

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10.1103/PhysRevMaterials.2.084408

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abstract = "Single crystals of AlFe2B2 have been grown using the self-flux growth method, and then we measured the structural properties, temperature- and field-dependent magnetization, and temperature-dependent electrical resistivity at ambient as well as high pressure. The Curie temperature of AlFe2B2 is determined to be 274 K. The measured saturation magnetization and the effective moment for the paramagnetic Fe ion indicate the itinerant nature of the magnetism with a Rhode-Wohlfarth ratio MCMsat≈1.14. Temperature-dependent resistivity measurements under hydrostatic pressure show that transition temperature TC is suppressed down to 255 K for p=2.24 GPa pressure with a suppression rate of ∼-8.9 K/GPa. The anisotropy fields and magnetocrystalline anisotropy constants are in reasonable agreement with density functional theory calculations.",

author = "Lamichhane, {Tej N.} and Li Xiang and Qisheng Lin and Tribhuwan Pandey and Parker, {David S.} and Kim, {Tae Hoon} and Lin Zhou and Kramer, {Matthew J.} and Bud'Ko, {Sergey L.} and Canfield, {Paul C.}",

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AU - Lamichhane, Tej N.

AU - Xiang, Li

AU - Lin, Qisheng

AU - Pandey, Tribhuwan

AU - Parker, David S.

AU - Kim, Tae Hoon

AU - Zhou, Lin

AU - Kramer, Matthew J.

AU - Bud'Ko, Sergey L.

AU - Canfield, Paul C.

PY - 2018/8/20

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AB - Single crystals of AlFe2B2 have been grown using the self-flux growth method, and then we measured the structural properties, temperature- and field-dependent magnetization, and temperature-dependent electrical resistivity at ambient as well as high pressure. The Curie temperature of AlFe2B2 is determined to be 274 K. The measured saturation magnetization and the effective moment for the paramagnetic Fe ion indicate the itinerant nature of the magnetism with a Rhode-Wohlfarth ratio MCMsat≈1.14. Temperature-dependent resistivity measurements under hydrostatic pressure show that transition temperature TC is suppressed down to 255 K for p=2.24 GPa pressure with a suppression rate of ∼-8.9 K/GPa. The anisotropy fields and magnetocrystalline anisotropy constants are in reasonable agreement with density functional theory calculations.

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Magnetic properties of single crystalline itinerant ferromagnet AlFe2 B2

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