Determination of spin Hamiltonian in the Ni 4 magnetic molecule

K. Iida, S. H. Lee, T. Onimaru, K. Matsubayashi, T. J. Sato

研究成果: ジャーナルへの寄稿学術論文査読

4 被引用数 (Scopus)

抄録

Magnetic excitations in a Ni 4 magnetic molecule were investigated by inelastic neutron scattering and bulk susceptibility (χ bulk) techniques. The magnetic excitation spectrum obtained from the inelastic neutron scattering experiments exhibits three modes at energy transfers of ω=0.5, 1.35, and 1.6 meV. We show that the energy, momentum, and temperature dependencies of the inelastic neutron scattering data and χ bulk can be well reproduced by an effective spin Hamiltonian consisting of intramolecule exchange interactions, a single-ionic anisotropy, biquadratic interactions, and a Zeeman term. Under hydrostatic pressure, the bulk magnetization decreases with increasing pressure, which along with the biquadratic term indicates spin-lattice coupling present in this system.

本文言語英語
論文番号064422
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
86
6
DOI
出版ステータス出版済み - 2012 8月 16

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