High-field magnetization of ${\mathrm{KEr}({\mathrm{MoO}}_{4})}_{2}$

High-field magnetization of ${KEr ({MoO}_{4})}_{2}$

K. Kutko, B. Bernáth, V. Khrustalyov, O. Young, H. Engelkamp, P. C. M. Christianen, L. Prodan, Y. Skourski, L. V. Pourovskii, S. Khmelevskyi, and D. Kamenskyi

Phys. Rev. B 109, 024438 – Published 30 January 2024

Abstract

We report a magnetization study of the rare-earth-based paramagnet $KEr {({MoO}_{4})}_{2}$ in a magnetic field up to 50 T. A recent observation of massive magnetostriction and rotational magnetocaloric effects in this compound triggered interest in the microscopic mechanism behind these phenomena. We combine several experimental techniques to investigate the magnetization behavior up to its saturation along three main crystallographic directions. The synergy of magnetic torque measurements and vibrating sample magnetometry allowed us to reconstruct parallel and perpendicular components of the magnetization vector, enabling us to trace its evolution up to 30 T. Our experiments reveal the magnetization saturation along all principle axes well below the value, expected from crystal electric field calculations. We argue that an externally applied magnetic field induces a distortion of the local environment of ${Er}^{3 +}$ ions and affects its crystal electric field splitting.

Received 19 July 2023
Revised 9 October 2023
Accepted 5 December 2023

DOI:https://doi.org/10.1103/PhysRevB.109.024438

Physics Subject Headings (PhySH)

High magnetic fields Lattice dynamics Magnetic anisotropy Magnetism Magnetization dynamics

Magnetic insulators Paramagnets Rare-earth magnetic materials

Crystal-field theory First-principles calculations Magnetization measurements Susceptibility measurements Torque magnetometry

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

K. Kutko ¹, B. Bernáth ^2,3, V. Khrustalyov ¹, O. Young^2,3, H. Engelkamp ^2,3, P. C. M. Christianen^2,3, L. Prodan ⁴, Y. Skourski⁵, L. V. Pourovskii ^6,7, S. Khmelevskyi ⁸, and D. Kamenskyi ^4,9,10,*

¹B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine (ILTPE), Nauky Avenue 47, Kharkiv 61103, Ukraine
²High Field Magnet Laboratory (HFML - EMFL) Radboud University Toernooiveld 7, NL-6525 ED Nijmegen, The Netherlands
³Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, NL-525 AJ Nijmegen, The Netherlands
⁴Experimental Physics V, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D-86159 Augsburg, Germany
⁵Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden–Rossendorf, D-01328 Dresden, Germany
⁶CPHT (Centre de Physique Théorique), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, F-91128 Palaiseau, France
⁷Collège de France, Université PSL, 11 place Marcelin Berthelot, F-75005 Paris, France
⁸Research Center for Materials Science and Engineering, Vienna University of Technology, Karlsplatz 13, A-1040 Vienna, Austria
⁹Department of Physics, Humboldt-Universitat zu Berlin, Newtonstrasse 15, D-12489 Berlin, Germany
¹⁰German Aerospace Center (DLR), Institute of Optical Sensor Systems, Rutherfordstrasse 2, D-12489 Berlin, Germany

^*dmytro.kamenskyi@physik.uni-augsburg.de

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Vol. 109, Iss. 2 — 1 January 2024

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Physical Review B

covering condensed matter and materials physics

High-field magnetization of ${KEr ({MoO}_{4})}_{2}$

K. Kutko, B. Bernáth, V. Khrustalyov, O. Young, H. Engelkamp, P. C. M. Christianen, L. Prodan, Y. Skourski, L. V. Pourovskii, S. Khmelevskyi, and D. Kamenskyi

Phys. Rev. B 109, 024438 – Published 30 January 2024

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Physical Review B

covering condensed matter and materials physics

High-field magnetization of KEr(MoO4)2

K. Kutko, B. Bernáth, V. Khrustalyov, O. Young, H. Engelkamp, P. C. M. Christianen, L. Prodan, Y. Skourski, L. V. Pourovskii, S. Khmelevskyi, and D. Kamenskyi

Phys. Rev. B 109, 024438 – Published 30 January 2024

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High-field magnetization of ${KEr ({MoO}_{4})}_{2}$