Extraction of exchange parameters in transition-metal perovskites

Furrer, A.; Podlesnyak, A.; Krämer, K. W.

doi:10.1103/PhysRevB.92.104415

Title: Extraction of exchange parameters in transition-metal perovskites

Journal Article · Tue Sep 15 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.104415· OSTI ID:1261467

Furrer, A. ^[1]; Podlesnyak, A. ^[2]; Krämer, K. W. ^[3]

Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Bern (Switzerland)

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-xF₃ and K₂Mn_xZn_1-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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1261467

Alternate ID(s):: OSTI ID: 1215771

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 10; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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References (21)

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Spin-phonon coupling and high-pressure phase transitions of $R Mn O_{3}$ ( $R = Ca$ and Pr): An inelastic neutron scattering and first-principles study Mishra, S. K.; Gupta, M. K.; Mittal, R. Physical Review B, Vol. 93, Issue 21 https://doi.org/10.1103/physrevb.93.214306	journal	June 2016
Magnetism of metallacrown single-molecule magnets: From a simplest model to realistic systems Pavlyukh, Y.; Rentschler, E.; Elmers, H. J. Physical Review B, Vol. 97, Issue 21 https://doi.org/10.1103/physrevb.97.214408	journal	June 2018

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