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: Article査読

4 被引用数 (Scopus)


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.

ジャーナルPhysical Review B - Condensed Matter and Materials Physics
出版ステータスPublished - 2012 8月 16

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学


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