Microphase separation in Pr0.67Ca0.33MnO3 by small-angle neutron scattering.
We have evidenced by small-angle neutron scattering at low temperature the coexistence of ferromagnetism (F) and antiferromagnetism (AF) in Pr0.67Ca0.33MnO3. The results are compared to those obtained in Pr0.80Ca0.20MnO3 and Pr0.63Ca0.37MnO3, which are F and AF, respectively. Quantitative analysis shows that the small-angle scattering is not due to a mesoscopic mixing but to a nanoscopic electronic and magnetic "red cabbage" structure, in which the ferromagnetic phase exists in the form of thin layers in the AF matrix (stripes or 2D "sheets").
Simon
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Laboratoire CRISMAT, Unité Mixte de Recherches 6508, Institut des Sciences de la Matière et du Rayonnement - Université de Caen, 6 Boulevard du Maréchal Juin, 14050 Caen Cedex, France.
Mercone
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Guiblin
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Martin
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C
Brûlet
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André
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