Abstract
AbstractUsing the methods of neutron and X‐ray diffraction analysis and magnetic measurements, polycrystalline samples of LaMnO3 were studied before and after irradiation with fast neutrons (En ≥ 1 MeV) at a fluence Φ = 5.5 × 1023 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 Q2 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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