Muon-spin-relaxation investigation of EuMn2O5

• Published in: JETP letters Vol. 91; no. 10; pp. 512 - 517
• Main Authors: Vorob’ev, S. I., Golovenchits, E. I., Koptev, V. P., Komarov, E. N., Kotov, S. A., Sanina, V. A., Shcherbakov, G. V.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.05.2010
• Subjects: Atomic; Biological and Medical Physics; Biophysics; Condensed Matter; Molecular; Optical and Plasma Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Quantum Information Technology; Solid State Physics; Spintronics; JETP Letter; Local Magnetic Field; Manganite; External Magnetic Field; Ceramic Sample
• ISSN: 0021-3640; 1090-6487
• DOI: 10.1134/S002136401010005X

The magnetic properties of the EuMn 2 O 5 multiferroic (samples consisting of single crystals and ceramic samples) have been investigated by the muon-spin-relaxation (μSR) method in the temperature range of 10–300 K. Below the magnetic ordering temperature T N = 40 K, the loss of the polarization of muons and the effect of the external magnetic field have been observed. Both phenomena can be explained by an additional channel of the depolarization of muons owing to the appearance of muons in a medium with a low electron density due to the charge separation process (the redistribution of the electron density in the phase transition process). The “memory” phenomenon has been revealed in a sample in the external magnetic field; the memory relaxation time depends on the size of the structure units of the samples (single crystals or ceramic grains).