Observation of field-dependent magnetic parameters in the magnetic molecule { Ni4 Mo12 }

Jürgen Schnack, Mirko Brüger, Marshall Luban, Paul Kögerler, Emilia Morosan, Ronald Fuchs, Robert Modler, Hiroyuki Nojiri, Ram C. Rai, Jinbo Cao, Janice L. Musfeldt, Xing Wei

研究成果: Article査読

34 被引用数 (Scopus)

抄録

We investigate the bulk magnetic, electron paramagnetic resonance, and magneto-optical properties of { Ni4 Mo12 }, a magnetic molecule with antiferromagnetically coupled tetrahedral NiII in a diamagnetic molybdenum matrix. The low-temperature magnetization exhibits steps at irregular field intervals, a result that cannot be explained using a Heisenberg model even if it is augmented by magnetic anisotropy and biquadratic terms. Allowing the exchange and anisotropy parameters to depend on the magnetic field provides the best fit to our data, suggesting that the molecular structure (and thus the interactions between spins) may be changing with applied magnetic field.

本文言語English
論文番号094401
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
73
9
DOI
出版ステータスPublished - 2006

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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