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We investigated the magnetism of FeVMoO7 by performing magnetization, specific heat, electron spin resonance, and neutron diffraction experiments. We observed an antiferromagnetically ordered state below T_N = 10.8 K. We consider that the probable spin model is an interacting antiferromagnetic spin-5/2 dimer model where spin dimers are connected by interdimer interactions. The intradimer interaction was evaluated to be
J = 10.5 +- 0.5 K. The magnitude of ordered magnetic moments is 4.00(7) mu_B at 4 K. The magnitude at 0 K is considered to be smaller than the classical value 4.95 mu_B (g=1.98). We confirmed a reduction of ordered magnetic moments by quantum fluctuation in high-spin (spin-5/2) clusters as known in high-spin chains.

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Keyword: quantum fluctuation, magnetism, ordered state, neutron, antiferromagnetically, diffraction, FeVMoO7, spin-5/2 dimer

Date published: 2019-03-15

Publisher: The Physical Society of Japan

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Manuscript type: Not a journal article

MDR DOI: https://doi.org/10.48505/nims.1441

First published URL: https://doi.org/10.7566/JPSJ.88.034711

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Updated at: 2024-01-05 22:12:14 +0900

Published on MDR: 2021-08-13 01:20:00 +0900