Magnetic properties of a spin-2 antiferromagnet with metal-radical hybrid spins

Y. Iwasaki, T. Okabe, N. Uemoto, Y. Kono, Y. Hosokoshi, S. Nakamura, S. Kittaka, T. Sakakibara, M. Hagiwara, T. Kawakami, and H. Yamaguchi
Phys. Rev. B 101, 174412 – Published 7 May 2020

Abstract

We present an S=2 antiferromagnet composed of a Mn-verdazyl complex [Mn(hfac)2][oPyV(4F)2]. An analysis of the magnetic behavior reveals that the strong antiferromagnetic intramolecular interaction between spins on Mn2+ and the verdazyl radical forms an S=2 hybrid spin below approximately 100 K. In the low-temperature regions, the magnetic susceptibility and the specific heat indicate a phase transition to the three-dimensional order of the S = 2 system. Below the transition temperature, the magnetization curve exhibits a metamagnetic phase transition. From the analysis of electron spin resonance modes, we evaluate the on-site biaxial anisotropy responsible for the anisotropic magnetic behavior.

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  • Received 4 February 2020
  • Revised 25 March 2020
  • Accepted 21 April 2020

DOI:https://doi.org/10.1103/PhysRevB.101.174412

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Y. Iwasaki1,*, T. Okabe1, N. Uemoto1, Y. Kono1, Y. Hosokoshi1, S. Nakamura2, S. Kittaka3, T. Sakakibara3, M. Hagiwara4, T. Kawakami5, and H. Yamaguchi1,†

  • 1Department of Physical Science, Osaka Prefecture University, Osaka 599-8531, Japan
  • 2Nagoya Institute of Technology, Nagoya 466-8555, Japan
  • 3Institute for Solid State Physics, The University of Tokyo, Chiba 277-8581, Japan
  • 4Center for Advanced High Magnetic Field Science (AHMF), Graduate School of Science, Osaka University, Osaka 560-0043, Japan
  • 5Department of Chemistry, Osaka University, Osaka 560-0043, Japan

  • *iwasaki@ahmf.sci.osaka-u.ac.jp
  • yamaguchi@p.s.osakafu-u.ac.jp

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Issue

Vol. 101, Iss. 17 — 1 May 2020

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