Nuclear magnetic resonance (NMR) probe of magnetic phase separation in electron-doped manganite Ca0.95La0.05MnO3

Using 55Mn nuclear magnetic resonance (NMR), the magnetic phase separation into antiferromagnetic and ferromagnetic phases was found in Ca0.95La0.05MnO3 manganite. At 4.2 K, distinct NMR signals from ferromagnetic domains, antiferromagnetic matrix, and from the domain walls were detected. Predominant relaxation mechanism in the ferromagnetic phase is the Suhl-Nakamura interaction. This suggests that ferromagnetic domains in Ca0.95La0.05MnO3 have mesoscopic rather than nanoscopic dimensions.