Microphase separation in Pr0.67Ca0.33MnO3 by small angle neutron scattering
Ch. Simon, S. Mercone, N. Guiblin, C. Martin, A. Brulet
TL;DR
This study uses small angle neutron scattering to reveal nanoscopic phase separation in Pr0.67Ca0.33MnO3, showing coexistence of ferromagnetic and antiferromagnetic regions in a layered 'red cabbage' structure.
Contribution
It provides direct evidence of nanoscopic phase separation and characterizes the specific layered magnetic structure in Pr0.67Ca0.33MnO3.
Findings
Coexistence of ferromagnetic and antiferromagnetic phases at low temperature
Nanoscopic 'red cabbage' layered structure identified
Distinct magnetic phases compared to related compounds
Abstract
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 form of thin layers in the AF matrix (stripes or 2D ''sheets'').
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