V. A. Atsarkin, V. V. Demidov, A. M. Balbashov, “Anomalous slowing down of the longitudinal spin relaxation near the antiferromagnetic phase transition in LaMnO<nobr>$_3$</nobr> manganite”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2004, Volume 80, Issue 9,Pages <nobr>693

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CONDENSED MATTER

Anomalous slowing down of the longitudinal spin relaxation near the antiferromagnetic phase transition in LaMnO$_3$ manganite

V. A. Atsarkin^a, V. V. Demidov^a, A. M. Balbashov^b

^a Institute of Radio Engineering and Electronics, Russian Academy of Sciences
^b Moscow Power Engineering Institute

Abstract: It has been found that, instead of the expected critical acceleration of the longitudinal spin relaxation near the Néel temperature in stoichiometric LaMnO$_3$ samples, the relaxation is sharply retarded. This slowing down is similar to that observed earlier in doped manganites with ferromagnetic ordering.

PACS: 75.40.-s, 75.47.-m, 76.30.-v

Received: 06.10.2004