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Magnetic Correlations and Spin Dynamics in Crystalline La1−xCa xMnO3 (x = 0, 0.1, 0.2, 0.3): Analysis of Basic EPR Parameters

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5 Author(s)
Auslender, M. ; Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva ; Shames, A.I. ; Rozenberg, E. ; Gorodetsky, G.
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Electron paramagnetic resonance data of La1-xCaxMnO3 compounds with x=0,0.1,0.2,0.3 were analyzed in order to explore the changes in effective spin-spin interactions and spin dynamics parameters. The presence of two magnetic subsystems - host of superexchange coupled Mn3+ ions and Mn4+ associated clusters is characteristic for x=0 and 0.1 samples, while ferromagnetically correlated host is observed in x=0.2 and 0.3 ones. The contributions of both ionic host and doped carriers to spin relaxation parameters were determined using general spin-dynamics theory.

Published in:

Magnetics, IEEE Transactions on  (Volume:43 ,  Issue: 6 )