Actions for Extraction of exchange parameters in transition-metal perovskites [electronic resource].

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Extraction of exchange parameters in transition-metal perovskites [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 104,415 : digital, PDF file
Additional Creators
Oak Ridge National Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
When extracting exchange parameters from measured spin-wave dispersion relations there are severe limitations particularly for magnetic compounds such as the transition-metal perovskites, where the nearest-neighbor exchange parameter usually dominates the couplings between the further-distant-neighbor spins. Very precise exchange parameters beyond the nearest-neighbor spins can be obtained by neutron spectroscopic investigations of the magnetic excitation spectra of isolated multimers in magnetically diluted compounds. Moreover, this is exemplified for manganese trimers in the mixed three-and two-dimensional perovskite compounds KMnxZn1-xF3 and K2MnxZn1-xF4, respectively. We show that the small exchange couplings between the second-nearest-neighbor and the third-nearest-neighbor spins can be determined unambiguously and with equal precision as the dominating nearest-neighbor exchange coupling.
Report Numbers
E 1.99:1261467
Subject(s)
Note
Published through SciTech Connect.
09/15/2015.
Physical Review. B, Condensed Matter and Materials Physics 92 10 ISSN 1098-0121; PRBMDO AM
A. Furrer; A. Podlesnyak; K. W. Krämer.
Funding Information
AC05-00OR22725
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