Antiferro–ferromagnetic transformation in LaMnO 3  under neutron irradiation | Zendy

Chukalkin Yurii | Zendy; Teplykh Alexander | Zendy; Goshchitskii Boris | Zendy

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Antiferro–ferromagnetic transformation in LaMnO 3 under neutron irradiation

Author(s) -

Chukalkin Yurii,

Teplykh Alexander,

Goshchitskii Boris

Publication year - 2005

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.200510032

Subject(s) - antiferromagnetism , ferromagnetism , irradiation , lanthanum , neutron diffraction , fluence , condensed matter physics , materials science , crystallite , neutron , manganese , transformation (genetics) , diffraction , chemistry , physics , nuclear physics , optics , metallurgy , biochemistry , gene

Using the methods of neutron and X‐ray diffraction analysis and magnetic measurements, polycrystalline samples of LaMnO 3 were studied before and after irradiation with fast neutrons ( E n ≥ 1 MeV) at a fluence Φ = 5.5 × 10 23 m –2 . It was established that irradiation leads to the partial (∼5%) mutual disordering of the “lanthanum” and “manganese” sublattices. Ion displacements emerging at such radiation‐induced disordering lead to the destruction of the Jahn–Teller mode Q 2 responsible for A‐type antiferromagnetism development in the initial sample. As a result, the antiferromagnet → canted ferromagnet magnetic transformation is observed. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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