Title :
Ferromagnetic-antiferromagnetic state in manganites
Author :
Demin, R.V. ; Koroleva, L.I. ; Szymczak, R.
Author_Institution :
Lomonosov (M.V.) State Univ., Moscow, Russia
Abstract :
Summary form only given. The interest in the perovskite Mn oxides is associated with a colossal magnetoresistance (CMR) that was observed in certain compounds near room temperature. Some authors think that CMR is bound up with magnetic two-phase ferromagnetic-antiferromagnetic state in these materials. We investigate the magnetic properties of La/sub 0.9/Sr/sub 0.1/MnO/sub 3/ single crystal, La/sub 0.7/A/sub 0.3/MnO/sub 3/ (A = Ca, Sr) ceramic and La/sub 0.1/Pr/sub 0.6/CaO/sub 3/MnO/sub 3/ and La/sub 0.84/Sr/sub 0.16/MnO/sub 3/ epitaxial films which testify to the ferromagnetic-antiferromagnetic state in these samples. All the samples have the temperature dependence of electrical resistivity of semiconducting type and CMR in the Curie point region.
Keywords :
ceramics; colossal magnetoresistance; electrical resistivity; magnetic epitaxial layers; magnetic hysteresis; magnetic semiconductors; magnetic structure; semiconductor epitaxial layers; 300 K; CMR; La/sub 0.1/Pr/sub 0.6/CaO/sub 3/MnO/sub 3/; La/sub 0.7/Ca/sub 0.3/MnO/sub 3/; La/sub 0.7/Sr/sub 0.3/MnO/sub 3/; La/sub 0.84/Sr/sub 0.16/MnO/sub 3/; La/sub 0.9/Sr/sub 0.1/MnO/sub 3/; ceramic; colossal magnetoresistance; electrical resistivity; ferromagnetic-antiferromagnetic state; magnetic epitaxial films; magnetic hysteresis loop; magnetic two-phase state; magnetization; perovskite Mn oxides; temperature dependence; Ceramics; Colossal magnetoresistance; Crystalline materials; Electric resistance; Magnetic materials; Magnetic properties; Semiconductor films; Strontium; Temperature dependence; Testing;
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
DOI :
10.1109/INTMAG.2002.1001340
