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Title: Extraction of exchange parameters in transition-metal perovskites

Abstract

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 KMn xZn 1-xF 3 and K 2Mn xZn 1-xF 4, 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.

Authors:
 [1];  [2];  [3]
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Bern (Switzerland)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1261467
Alternate Identifier(s):
OSTI ID: 1215771
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 10; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Furrer, A., Podlesnyak, A., and Krämer, K. W. Extraction of exchange parameters in transition-metal perovskites. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.104415.
Furrer, A., Podlesnyak, A., & Krämer, K. W. Extraction of exchange parameters in transition-metal perovskites. United States. doi:10.1103/PhysRevB.92.104415.
Furrer, A., Podlesnyak, A., and Krämer, K. W. Tue . "Extraction of exchange parameters in transition-metal perovskites". United States. doi:10.1103/PhysRevB.92.104415. https://www.osti.gov/servlets/purl/1261467.
@article{osti_1261467,
title = {Extraction of exchange parameters in transition-metal perovskites},
author = {Furrer, A. and Podlesnyak, A. and Krämer, K. W.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.92.104415},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 10,
volume = 92,
place = {United States},
year = {2015},
month = {9}
}

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