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Title: Effect of cation disorder on the magnetic properties of Sr{sub 2}Fe{sub 1-x}Ga{sub x}ReO{sub 6} (0<x<0.7) double perovskites

Abstract

The effect of diamagnetic dilution of the Fe sublattice on the structural and magnetic properties of the double perovskite Sr{sub 2}Fe{sub 1-x}Ga{sub x}ReO{sub 6} (0<x<0.7) has been explored by means of x-ray structural analysis, magnetometry, Moessbauer spectroscopy, and band structure calculations. The end member of the solid solution series, Sr{sub 2}GaReO{sub 6}, was predicted to be a half-metallic ferromagnet based on ab initio band structure calculations using the WIEN2k software package. Because the Re-containing double perovskites, like the parent compound Sr{sub 2}FeReO{sub 6}, rarely exhibit antisite disorder, the appearance of increasing amounts of antisite disorder in Sr{sub 2}Fe{sub 1-x}Ga{sub x}ReO{sub 6} (0<x<0.7) is unexpected. Although the amount of antisite disorder increases with increasing Ga content, it also depends on the sample preparation history. For 0<x<0.4 only a tetragonal, magnetically ordered phase was detected by x-ray structural analysis as well as Moessbauer analysis. A phase separation into a tetragonal and a cubic phase for x{>=}0.4 is detected by x-ray structural analysis accompanied by the observation of a magnetically ordered and a paramagnetic phase in the corresponding Moessbauer spectra. Below 20% Ga content, Ga statistically dilutes the -Fe-O-Re-O-Fe- double-exchange pathways. Phase separation begins at 20% Ga substitution; between 20% and 40% ofmore » Ga content, the paramagnetic Ga-based phase does not contain any Fe. The Fe-containing, paramagnetic cubic phases which can be detected by Moessbauer spectroscopy first appear for x=0.4.« less

Authors:
; ; ; ; ; ;  [1]
  1. Institut fuer anorganische und analytische Chemie, Johannes Gutenberg-Universitaet Mainz, D-55099 Mainz (Germany)
Publication Date:
OSTI Identifier:
20951417
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 75; Journal Issue: 18; Other Information: DOI: 10.1103/PhysRevB.75.184409; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; AUGMENTATION; CATIONS; CRYSTAL STRUCTURE; DEFECTS; FERROMAGNETIC MATERIALS; GALLIUM COMPOUNDS; IRON COMPOUNDS; MAGNETIC PROPERTIES; MOESSBAUER EFFECT; PARAMAGNETISM; PEROVSKITE; RHENIUM COMPOUNDS; SOLID SOLUTIONS; STRONTIUM COMPOUNDS; W CODES; X-RAY DIFFRACTION

Citation Formats

Jung, Alexandra, Bonn, Irene, Ksenofontov, Vadim, Panthoefer, Martin, Reiman, Sergey, Felser, Claudia, and Tremel, Wolfgang. Effect of cation disorder on the magnetic properties of Sr{sub 2}Fe{sub 1-x}Ga{sub x}ReO{sub 6} (0<x<0.7) double perovskites. United States: N. p., 2007. Web. doi:10.1103/PHYSREVB.75.184409.
Jung, Alexandra, Bonn, Irene, Ksenofontov, Vadim, Panthoefer, Martin, Reiman, Sergey, Felser, Claudia, & Tremel, Wolfgang. Effect of cation disorder on the magnetic properties of Sr{sub 2}Fe{sub 1-x}Ga{sub x}ReO{sub 6} (0<x<0.7) double perovskites. United States. https://doi.org/10.1103/PHYSREVB.75.184409
Jung, Alexandra, Bonn, Irene, Ksenofontov, Vadim, Panthoefer, Martin, Reiman, Sergey, Felser, Claudia, and Tremel, Wolfgang. 2007. "Effect of cation disorder on the magnetic properties of Sr{sub 2}Fe{sub 1-x}Ga{sub x}ReO{sub 6} (0<x<0.7) double perovskites". United States. https://doi.org/10.1103/PHYSREVB.75.184409.
@article{osti_20951417,
title = {Effect of cation disorder on the magnetic properties of Sr{sub 2}Fe{sub 1-x}Ga{sub x}ReO{sub 6} (0<x<0.7) double perovskites},
author = {Jung, Alexandra and Bonn, Irene and Ksenofontov, Vadim and Panthoefer, Martin and Reiman, Sergey and Felser, Claudia and Tremel, Wolfgang},
abstractNote = {The effect of diamagnetic dilution of the Fe sublattice on the structural and magnetic properties of the double perovskite Sr{sub 2}Fe{sub 1-x}Ga{sub x}ReO{sub 6} (0<x<0.7) has been explored by means of x-ray structural analysis, magnetometry, Moessbauer spectroscopy, and band structure calculations. The end member of the solid solution series, Sr{sub 2}GaReO{sub 6}, was predicted to be a half-metallic ferromagnet based on ab initio band structure calculations using the WIEN2k software package. Because the Re-containing double perovskites, like the parent compound Sr{sub 2}FeReO{sub 6}, rarely exhibit antisite disorder, the appearance of increasing amounts of antisite disorder in Sr{sub 2}Fe{sub 1-x}Ga{sub x}ReO{sub 6} (0<x<0.7) is unexpected. Although the amount of antisite disorder increases with increasing Ga content, it also depends on the sample preparation history. For 0<x<0.4 only a tetragonal, magnetically ordered phase was detected by x-ray structural analysis as well as Moessbauer analysis. A phase separation into a tetragonal and a cubic phase for x{>=}0.4 is detected by x-ray structural analysis accompanied by the observation of a magnetically ordered and a paramagnetic phase in the corresponding Moessbauer spectra. Below 20% Ga content, Ga statistically dilutes the -Fe-O-Re-O-Fe- double-exchange pathways. Phase separation begins at 20% Ga substitution; between 20% and 40% of Ga content, the paramagnetic Ga-based phase does not contain any Fe. The Fe-containing, paramagnetic cubic phases which can be detected by Moessbauer spectroscopy first appear for x=0.4.},
doi = {10.1103/PHYSREVB.75.184409},
url = {https://www.osti.gov/biblio/20951417}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 18,
volume = 75,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}