SANS study of magnetic phase transitions in CaMn7O12
2000; Elsevier BV; Volume: 276-278; Linguagem: Inglês
10.1016/s0921-4526(99)01743-3
ISSN1873-2135
AutoresR. Przeniosoł, I. Sosnowska, Pavel Strunz, D. Hohlwein, Thomas Hauß, I. O. Troyanchuk,
Tópico(s)Solid-state spectroscopy and crystallography
ResumoThe mixed valence manganite CaMn7O12 system has a modulated magnetic ordering below 90 K which gives magnetic satellite reflections at Q<0.2Å−1. The results of small-angle neutron scattering (SANS) measurements on polycrystalline CaMn7O12 with and without external magnetic fields are discussed. It was found that near 50 K there is a second magnetic phase transition connected with a splitting of the satellite reflection. The QMAX positions, intensities and half-widths of the reflections depend on temperature. The influence of the external magnetic field on the magnetic ordering is also discussed.
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