On the strength of the double exchange and superexchange interactions in La0.67Ca0.33Mn1-yFeyO3 - an NMR and Mossbauer study

J  Przewoznik; C  Kapusta; J  Zukrowski; K  Krop; M  Sikora; D  Rybicki; D  Zajac; C J  Oates; P C  Riedi

doi:10.1002/pssb.200562425

On the strength of the double exchange and superexchange interactions in La0.67Ca0.33Mn1-yFeyO3 - an NMR and Mossbauer study

J Przewoznik, C Kapusta, J Zukrowski, K Krop, M Sikora, D Rybicki, D Zajac, C J Oates, P C Riedi

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

A combined study of (La0.67Ca0.33Mn0.97Fe0.03O3)-Fe-57 compound by means of zero field Mn-55 and Fe-17 NMR as well as Fe-57 Mossbauer spectroscopy (MS) is reported. The Mn-55 NMR spectra exhibit a single double exchange (DE) line up to the magnetic ordering temperature (T-C), 200 K, determined from magnetization measurements. The hyperfine field (HFF) remains finite at the T-C, which reveals discontinuous character of the transition and the occurrence of a ferromagnetic-paramagnetic phase segregation. The Fe-57 MS HFF decreases much faster with increasing temperature than the Mn-55 NMR HFF. Application of a molecular field model to the temperature dependence of the Mn-55 and Fe-57 HFF allows to estimate values of the Mn-Mn and the Fe-Mn exchange integrals, which amount to 1.24 meV and -0.6 meV, respectively. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English
Pages (from-to)	259-262
Number of pages	4
Journal	Physica Status Solidi. B
Volume	243
DOIs	https://doi.org/10.1002/pssb.200562425
Publication status	Published - Jan 2006

Keywords

SPECTRA

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title = "On the strength of the double exchange and superexchange interactions in La0.67Ca0.33Mn1-yFeyO3 - an NMR and Mossbauer study",

abstract = "A combined study of (La0.67Ca0.33Mn0.97Fe0.03O3)-Fe-57 compound by means of zero field Mn-55 and Fe-17 NMR as well as Fe-57 Mossbauer spectroscopy (MS) is reported. The Mn-55 NMR spectra exhibit a single double exchange (DE) line up to the magnetic ordering temperature (T-C), 200 K, determined from magnetization measurements. The hyperfine field (HFF) remains finite at the T-C, which reveals discontinuous character of the transition and the occurrence of a ferromagnetic-paramagnetic phase segregation. The Fe-57 MS HFF decreases much faster with increasing temperature than the Mn-55 NMR HFF. Application of a molecular field model to the temperature dependence of the Mn-55 and Fe-57 HFF allows to estimate values of the Mn-Mn and the Fe-Mn exchange integrals, which amount to 1.24 meV and -0.6 meV, respectively. (c) 2006 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

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year = "2006",

month = jan,

doi = "10.1002/pssb.200562425",

language = "English",

volume = "243",

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T1 - On the strength of the double exchange and superexchange interactions in La0.67Ca0.33Mn1-yFeyO3 - an NMR and Mossbauer study

AU - Przewoznik, J

AU - Kapusta, C

AU - Zukrowski, J

AU - Krop, K

AU - Sikora, M

AU - Rybicki, D

AU - Zajac, D

AU - Oates, C J

AU - Riedi, P C

PY - 2006/1

Y1 - 2006/1

N2 - A combined study of (La0.67Ca0.33Mn0.97Fe0.03O3)-Fe-57 compound by means of zero field Mn-55 and Fe-17 NMR as well as Fe-57 Mossbauer spectroscopy (MS) is reported. The Mn-55 NMR spectra exhibit a single double exchange (DE) line up to the magnetic ordering temperature (T-C), 200 K, determined from magnetization measurements. The hyperfine field (HFF) remains finite at the T-C, which reveals discontinuous character of the transition and the occurrence of a ferromagnetic-paramagnetic phase segregation. The Fe-57 MS HFF decreases much faster with increasing temperature than the Mn-55 NMR HFF. Application of a molecular field model to the temperature dependence of the Mn-55 and Fe-57 HFF allows to estimate values of the Mn-Mn and the Fe-Mn exchange integrals, which amount to 1.24 meV and -0.6 meV, respectively. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - A combined study of (La0.67Ca0.33Mn0.97Fe0.03O3)-Fe-57 compound by means of zero field Mn-55 and Fe-17 NMR as well as Fe-57 Mossbauer spectroscopy (MS) is reported. The Mn-55 NMR spectra exhibit a single double exchange (DE) line up to the magnetic ordering temperature (T-C), 200 K, determined from magnetization measurements. The hyperfine field (HFF) remains finite at the T-C, which reveals discontinuous character of the transition and the occurrence of a ferromagnetic-paramagnetic phase segregation. The Fe-57 MS HFF decreases much faster with increasing temperature than the Mn-55 NMR HFF. Application of a molecular field model to the temperature dependence of the Mn-55 and Fe-57 HFF allows to estimate values of the Mn-Mn and the Fe-Mn exchange integrals, which amount to 1.24 meV and -0.6 meV, respectively. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

KW - SPECTRA

UR - https://www.scopus.com/pages/publications/31144468696

U2 - 10.1002/pssb.200562425

DO - 10.1002/pssb.200562425

M3 - Article

SN - 0370-1972

VL - 243

SP - 259

EP - 262

JO - Physica Status Solidi. B

JF - Physica Status Solidi. B

ER -

On the strength of the double exchange and superexchange interactions in La0.67Ca0.33Mn1-yFeyO3 - an NMR and Mossbauer study

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Keywords

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