Features of low-frequency spin dynamics in manganite LaMnO{sub 3} according to {sup 139}La NMR data

Journal Article · Sat Apr 15 00:00:00 EDT 2006 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776106040170· OSTI ID:21067700

Lekomtsev, S A; Yakubovskii, A Yu ^[1]; Kaul, A R ^[2]

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1. Russian Research Center Kurchatov Institute (Russian Federation)
2. Moscow State University (Russian Federation)

The spin-lattice and spin-spin relaxation times of {sup 139}La are measured in manganite LaMnO{sub 3}. Analysis of the frequency dependence of the spin-lattice relaxation rate in the paramagnetic temperature range shows that this quantity is determined by magnetic fluctuations. The magnitude of the fluctuating field is estimated. It is shown that the correlation time for spin fluctuations varies with temperature in accordance with the Arrhenius law. The high value of the spin-spin relaxation rate in the paramagnetic region can be due to strong anisotropy of fluctuating magnetic fields at La nuclei.

• OSTI ID: 21067700
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 102, Issue 4; Other Information: DOI: 10.1134/S1063776106040170; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
FREQUENCY DEPENDENCE
LANTHANUM 139
LANTHANUM COMPOUNDS
MANGANATES
NUCLEAR MAGNETIC RESONANCE
PARAMAGNETISM
SPIN
SPIN-LATTICE RELAXATION
SPIN-SPIN RELAXATION
TEMPERATURE DEPENDENCE