Mössbauer study of magnetic order in RBa2Fe3O8

O. Cohen; I. Felner; I. Nowik; U. Yaron; E. R. Bauminger

doi:10.1007/BF00567624

Mössbauer study of magnetic order in RBa₂Fe₃O₈

O. Cohen^*, I. Felner, I. Nowik, U. Yaron, E. R. Bauminger

^*Corresponding author for this work

Racah Institute of Physics

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

5 Scopus citations

Abstract

Complete replacement of copper by iron in RBa₂Cu₃O₇ leads to RBa₂Fe₃O₈ (R=Y, rare earth). Mössbauer spectroscopy measurements of⁵⁷Fe and¹⁵¹Eu in RBa₂Fe₃O₈ (R=Y, Eu, Ho, Er) at temperatures 4.2-800 K have been performed. Some of the spectra reveal two inequivalent iron sites, probably corresponding to iron in the Fe(2) site (fivefold oxygen coordination) and in the Fe(1) site (octahedral oxygen coordination). In all compounds the iron moments order antiferromagnetically at the same Néel temperature T_N≈720 K. The¹⁵¹Eu Mössbauer spectra of EuBa₂Fe₃O₈ show that the Eu ion is trivalent and exposed to a small exchange field from the iron sublattices.

Original language	English
Pages (from-to)	897-900
Number of pages	4
Journal	Hyperfine Interactions
Volume	79
Issue number	1-4
DOIs	https://doi.org/10.1007/BF00567624
State	Published - Mar 1993

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title = "M{\"o}ssbauer study of magnetic order in RBa2Fe3O8",

abstract = "Complete replacement of copper by iron in RBa2Cu3O7 leads to RBa2Fe3O8 (R=Y, rare earth). M{\"o}ssbauer spectroscopy measurements of57Fe and151Eu in RBa2Fe3O8 (R=Y, Eu, Ho, Er) at temperatures 4.2-800 K have been performed. Some of the spectra reveal two inequivalent iron sites, probably corresponding to iron in the Fe(2) site (fivefold oxygen coordination) and in the Fe(1) site (octahedral oxygen coordination). In all compounds the iron moments order antiferromagnetically at the same N{\'e}el temperature TN≈720 K. The151Eu M{\"o}ssbauer spectra of EuBa2Fe3O8 show that the Eu ion is trivalent and exposed to a small exchange field from the iron sublattices.",

author = "O. Cohen and I. Felner and I. Nowik and U. Yaron and Bauminger, {E. R.}",

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T1 - Mössbauer study of magnetic order in RBa2Fe3O8

AU - Cohen, O.

AU - Felner, I.

AU - Nowik, I.

AU - Yaron, U.

AU - Bauminger, E. R.

PY - 1993/3

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N2 - Complete replacement of copper by iron in RBa2Cu3O7 leads to RBa2Fe3O8 (R=Y, rare earth). Mössbauer spectroscopy measurements of57Fe and151Eu in RBa2Fe3O8 (R=Y, Eu, Ho, Er) at temperatures 4.2-800 K have been performed. Some of the spectra reveal two inequivalent iron sites, probably corresponding to iron in the Fe(2) site (fivefold oxygen coordination) and in the Fe(1) site (octahedral oxygen coordination). In all compounds the iron moments order antiferromagnetically at the same Néel temperature TN≈720 K. The151Eu Mössbauer spectra of EuBa2Fe3O8 show that the Eu ion is trivalent and exposed to a small exchange field from the iron sublattices.

AB - Complete replacement of copper by iron in RBa2Cu3O7 leads to RBa2Fe3O8 (R=Y, rare earth). Mössbauer spectroscopy measurements of57Fe and151Eu in RBa2Fe3O8 (R=Y, Eu, Ho, Er) at temperatures 4.2-800 K have been performed. Some of the spectra reveal two inequivalent iron sites, probably corresponding to iron in the Fe(2) site (fivefold oxygen coordination) and in the Fe(1) site (octahedral oxygen coordination). In all compounds the iron moments order antiferromagnetically at the same Néel temperature TN≈720 K. The151Eu Mössbauer spectra of EuBa2Fe3O8 show that the Eu ion is trivalent and exposed to a small exchange field from the iron sublattices.

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Mössbauer study of magnetic order in RBa₂Fe₃O₈

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