Exchange splitting of ionic S‐State in MnFe 2 O 4  studied by neutron spectroscopy | Zendy

Ligenza S. | Zendy

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Exchange splitting of ionic S‐State in MnFe 2 O 4 studied by neutron spectroscopy

Author(s) -

Ligenza S.

Publication year - 1978

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220860225

Subject(s) - spins , inelastic neutron scattering , condensed matter physics , octahedron , spectroscopy , tetrahedron , neutron , zero field splitting , chemistry , atomic physics , neutron scattering , physics , crystallography , spin polarization , crystal structure , electron , quantum mechanics

Inelastic neutron scattering is used to investigate spin interactions in polycrystalline MnFe 2 O 4 . Neutron spectra connected with local spin interaction (not perturbated by cooperative phenomena) are observed and interpreted basing on the 6 S 5/2 ‐term splitting of ions situated in octahedral B‐sites and tetrahedral A‐sites. In the analysis of 6 S 5/2 ‐term splitting the phenomenological spin‐Hamiltonian is used, assuming a magneto‐electric interaction of spins. The transition energy peaks connected with different magnetic coordinations at B‐sites and A‐sites are observed. Defining the interaction between pairs of spins as — 2 J AB S A · S B it is found that J AB / k = (– 20.0 ± 0.7) K, in agreement with the result obtained from magnon dispersion measurements.

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