Mechanisms of Spin-Mixing Instabilities in Antiferromagnetic Molecular Wheels | Zendy

Alessandro Soncini | Zendy; Liviu F. Chibotaru | Zendy

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Mechanisms of Spin-Mixing Instabilities in Antiferromagnetic Molecular Wheels

Author(s) -

Alessandro Soncini,

Liviu F. Chibotaru

Publication year - 2007

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.99.077204

Subject(s) - mixing (physics) , antiferromagnetism , condensed matter physics , spin (aerodynamics) , physics , field (mathematics) , quantum mechanics , thermodynamics , mathematics , pure mathematics

The microscopic theory of field-induced spin-mixing instabilities in antiferromagnetic molecular wheels CsFe8 is proposed. The basic features of magnetic torque measurements [O. Waldmann , Phys. Rev. Lett. 96, 027206 (2006)] are well explained by the interplay of three basic ingredients: the spin-mixing vibronic interaction with field-dependent vibronic constants, cooperative elastic interactions, and spin-mixing interactions independent from vibrations. The main contribution to spin mixing comes from second-order zero-field splitting mechanisms. At variance with previous interpretations, we find that the observed anomalies are not associated with a phase transition.status: publishe

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