Crystal and magnetic structure of polar oxide HoCrWO6

C. Dhital; D. Pham; T. Lawal; C. Bucholz; A. Poyraz; Q. Zhang; R. Nepal; R. Jin; R. Rai

doi:10.1016/j.jmmm.2020.167219

Crystal and magnetic structure of polar oxide HoCrWO₆

C. Dhital, D. Pham, T. Lawal, C. Bucholz, A. Poyraz, Q. Zhang, R. Nepal, R. Jin, R. Rai

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Abstract

Polar magnetic oxide HoCrWO₆ is synthesized and its crystal structure, magnetic structure, and thermodynamic properties are investigated. HoCrWO₆ forms the polar crystal structure (space group Pna2₁ (#33)) due to the cation ordering of W⁶⁺ and Cr³⁺. There is an antiferromagnetic transition at T_N = 24.5 K along with the magnetic entropy change (~5 J.Kg.⁻¹K⁻¹ at 70 kOe). Neutron diffraction measurement indicates that both Cr and Ho sublattices are ordered with the moment of 2.32(5)μ_B and 8.7(4)μ_B at 2 K, respectively. While Cr forms A-type collinear antiferromagnetic (AFM) structure with magnetic moment along the b axis, Ho sublattice orders in a non-coplanar AFM arrangement. A comparison with isostructural DyFeWO₆ and DyCrWO₆ indicates that the magnetic structure of this family of compounds is controlled by the presence or absence of e_g electrons in the transition metal sublattice.

Original language	English
Article number	167219
Journal	Journal of Magnetism and Magnetic Materials
Volume	514
DOIs	https://doi.org/10.1016/j.jmmm.2020.167219
State	Published - Nov 15 2020

Funding

The work at Kennesaw State University was supported by faculty startup grant. Work at SUNY Buffalo State was supported by the National Science Foundation (Grant No. DMR-1406766 ). RN and RJ are supported by by the U.S. Department of Energy (DOE) under EPSCoR Grant No. DE-SC0016315 . A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, USA . A portion of this work was performed at the National High Magnetic Field Laboratory , USA which is supported by National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida. The work at Kennesaw State University was supported by faculty startup grant. Work at SUNY Buffalo State was supported by the National Science Foundation (Grant No. DMR-1406766). RN and RJ are supported by by the U.S. Department of Energy (DOE) under EPSCoR Grant No. DE-SC0016315. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, USA. A portion of this work was performed at the National High Magnetic Field Laboratory, USA which is supported by National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida.

Funders	Funder number
State of Florida
National Science Foundation	DMR-1406766
U.S. Department of Energy
Directorate for Mathematical and Physical Sciences	1406766
Office of Experimental Program to Stimulate Competitive Research	DMR-1644779, DE-SC0016315
Office of Science
Oak Ridge National Laboratory

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title = "Crystal and magnetic structure of polar oxide HoCrWO6",

abstract = "Polar magnetic oxide HoCrWO6 is synthesized and its crystal structure, magnetic structure, and thermodynamic properties are investigated. HoCrWO6 forms the polar crystal structure (space group Pna21 (#33)) due to the cation ordering of W6+ and Cr3+. There is an antiferromagnetic transition at TN = 24.5 K along with the magnetic entropy change (~5 J.Kg.−1K−1 at 70 kOe). Neutron diffraction measurement indicates that both Cr and Ho sublattices are ordered with the moment of 2.32(5)μB and 8.7(4)μB at 2 K, respectively. While Cr forms A-type collinear antiferromagnetic (AFM) structure with magnetic moment along the b axis, Ho sublattice orders in a non-coplanar AFM arrangement. A comparison with isostructural DyFeWO6 and DyCrWO6 indicates that the magnetic structure of this family of compounds is controlled by the presence or absence of eg electrons in the transition metal sublattice.",

author = "C. Dhital and D. Pham and T. Lawal and C. Bucholz and A. Poyraz and Q. Zhang and R. Nepal and R. Jin and R. Rai",

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year = "2020",

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doi = "10.1016/j.jmmm.2020.167219",

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T1 - Crystal and magnetic structure of polar oxide HoCrWO6

AU - Dhital, C.

AU - Pham, D.

AU - Lawal, T.

AU - Bucholz, C.

AU - Poyraz, A.

AU - Zhang, Q.

AU - Nepal, R.

AU - Jin, R.

AU - Rai, R.

PY - 2020/11/15

Y1 - 2020/11/15

N2 - Polar magnetic oxide HoCrWO6 is synthesized and its crystal structure, magnetic structure, and thermodynamic properties are investigated. HoCrWO6 forms the polar crystal structure (space group Pna21 (#33)) due to the cation ordering of W6+ and Cr3+. There is an antiferromagnetic transition at TN = 24.5 K along with the magnetic entropy change (~5 J.Kg.−1K−1 at 70 kOe). Neutron diffraction measurement indicates that both Cr and Ho sublattices are ordered with the moment of 2.32(5)μB and 8.7(4)μB at 2 K, respectively. While Cr forms A-type collinear antiferromagnetic (AFM) structure with magnetic moment along the b axis, Ho sublattice orders in a non-coplanar AFM arrangement. A comparison with isostructural DyFeWO6 and DyCrWO6 indicates that the magnetic structure of this family of compounds is controlled by the presence or absence of eg electrons in the transition metal sublattice.

AB - Polar magnetic oxide HoCrWO6 is synthesized and its crystal structure, magnetic structure, and thermodynamic properties are investigated. HoCrWO6 forms the polar crystal structure (space group Pna21 (#33)) due to the cation ordering of W6+ and Cr3+. There is an antiferromagnetic transition at TN = 24.5 K along with the magnetic entropy change (~5 J.Kg.−1K−1 at 70 kOe). Neutron diffraction measurement indicates that both Cr and Ho sublattices are ordered with the moment of 2.32(5)μB and 8.7(4)μB at 2 K, respectively. While Cr forms A-type collinear antiferromagnetic (AFM) structure with magnetic moment along the b axis, Ho sublattice orders in a non-coplanar AFM arrangement. A comparison with isostructural DyFeWO6 and DyCrWO6 indicates that the magnetic structure of this family of compounds is controlled by the presence or absence of eg electrons in the transition metal sublattice.

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VL - 514

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

M1 - 167219

ER -

Crystal and magnetic structure of polar oxide HoCrWO₆

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