skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Manganite charge and orbitally ordered and disordered states probed by Fe substitution into Mn site in LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5}, LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 6} and LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5.5} (Ln=Y, Gd, Sm, Nd, Pr, La)

Abstract

The layered manganese oxides LnBaMn{sub 1.96}Fe{sub 0.04}O{sub y} (Ln=Y, Gd, Sm, Nd, Pr, La) have been synthesized for y=5,5.5 and 6. In the oxygen-saturated state (y=6) they exhibit the charge and orbital order at ambient temperature for Ln=Y, Gd, Sm, but unordered e{sub g}-electronic system for Ln=La, Pr, Nd. Fourfold increase of quadrupole splitting was observed owing to the charge and orbital ordering. This is in agreement with the jumplike increase in distortion of the reduced perovskite-like cell for the charge and orbitally ordered manganites compared to the unordered ones. Substitution of 2% of Mn by Fe suppresses the temperatures of structural and magnetic transitions by 20-50 K. Parameters of the crystal lattices and the room-temperature Moessbauer spectra were studied on 40 samples whose structures were refined within five symmetry groups: P4/mmm, P4/nmm, Pm-3m, Icma and P2/m. Overwhelming majority of the Fe species are undifferentiated in the Moessbauer spectra for most of the samples. Such the single-component spectra in the two-site structures are explained by the preference of Fe towards the site of Mn(III) and by the segmentation of the charge and orbitally ordered domains. - Moessbauer spectra were studied in manganites whose structures were refined with symmetry groups: P4/mmm,more » P4/nmm, Pm3m, Icma and P2.« less

Authors:
 [1];  [2]
  1. Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan)
  2. School of Engineering, The University of Tokyo, Hongo 7-3-1, 113-8656 (Japan)
Publication Date:
OSTI Identifier:
21370535
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 182; Journal Issue: 8; Other Information: DOI: 10.1016/j.jssc.2009.05.029; PII: S0022-4596(09)00236-9; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMBIENT TEMPERATURE; BARIUM COMPOUNDS; CUBIC LATTICES; GADOLINIUM COMPOUNDS; IRON COMPOUNDS; MANGANESE OXIDES; MOESSBAUER EFFECT; NEODYMIUM COMPOUNDS; PEROVSKITE; PRASEODYMIUM COMPOUNDS; SAMARIUM COMPOUNDS; SYMMETRY GROUPS; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0273-0400 K; TETRAGONAL LATTICES; YTTRIUM COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; MANGANESE COMPOUNDS; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PEROVSKITES; RARE EARTH COMPOUNDS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS

Citation Formats

Rykov, Alexandre I., E-mail: rykov@woody.ocn.ne.j, Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Ueda, Yutaka, and Nomura, Kiyoshi. Manganite charge and orbitally ordered and disordered states probed by Fe substitution into Mn site in LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5}, LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 6} and LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5.5} (Ln=Y, Gd, Sm, Nd, Pr, La). United States: N. p., 2009. Web. doi:10.1016/j.jssc.2009.05.029.
Rykov, Alexandre I., E-mail: rykov@woody.ocn.ne.j, Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Ueda, Yutaka, & Nomura, Kiyoshi. Manganite charge and orbitally ordered and disordered states probed by Fe substitution into Mn site in LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5}, LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 6} and LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5.5} (Ln=Y, Gd, Sm, Nd, Pr, La). United States. https://doi.org/10.1016/j.jssc.2009.05.029
Rykov, Alexandre I., E-mail: rykov@woody.ocn.ne.j, Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Ueda, Yutaka, and Nomura, Kiyoshi. 2009. "Manganite charge and orbitally ordered and disordered states probed by Fe substitution into Mn site in LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5}, LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 6} and LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5.5} (Ln=Y, Gd, Sm, Nd, Pr, La)". United States. https://doi.org/10.1016/j.jssc.2009.05.029.
@article{osti_21370535,
title = {Manganite charge and orbitally ordered and disordered states probed by Fe substitution into Mn site in LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5}, LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 6} and LnBaMn{sub 1.96}Fe{sub 0.04}O{sub 5.5} (Ln=Y, Gd, Sm, Nd, Pr, La)},
author = {Rykov, Alexandre I., E-mail: rykov@woody.ocn.ne.j and Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 and Ueda, Yutaka and Nomura, Kiyoshi},
abstractNote = {The layered manganese oxides LnBaMn{sub 1.96}Fe{sub 0.04}O{sub y} (Ln=Y, Gd, Sm, Nd, Pr, La) have been synthesized for y=5,5.5 and 6. In the oxygen-saturated state (y=6) they exhibit the charge and orbital order at ambient temperature for Ln=Y, Gd, Sm, but unordered e{sub g}-electronic system for Ln=La, Pr, Nd. Fourfold increase of quadrupole splitting was observed owing to the charge and orbital ordering. This is in agreement with the jumplike increase in distortion of the reduced perovskite-like cell for the charge and orbitally ordered manganites compared to the unordered ones. Substitution of 2% of Mn by Fe suppresses the temperatures of structural and magnetic transitions by 20-50 K. Parameters of the crystal lattices and the room-temperature Moessbauer spectra were studied on 40 samples whose structures were refined within five symmetry groups: P4/mmm, P4/nmm, Pm-3m, Icma and P2/m. Overwhelming majority of the Fe species are undifferentiated in the Moessbauer spectra for most of the samples. Such the single-component spectra in the two-site structures are explained by the preference of Fe towards the site of Mn(III) and by the segmentation of the charge and orbitally ordered domains. - Moessbauer spectra were studied in manganites whose structures were refined with symmetry groups: P4/mmm, P4/nmm, Pm3m, Icma and P2.},
doi = {10.1016/j.jssc.2009.05.029},
url = {https://www.osti.gov/biblio/21370535}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 8,
volume = 182,
place = {United States},
year = {Sat Aug 15 00:00:00 EDT 2009},
month = {Sat Aug 15 00:00:00 EDT 2009}
}