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Title: Temperature and magnetic field dependent optical spectral weight in the cation-deficient colossal-magnetoresistance material La{sub 0.936}Mn{sub 0.982}O{sub 3}

Abstract

The optical reflectivity of a vacancy doped colossal magnetoresistance material La{sub 0.936}Mn{sub 0.982}O{sub 3} has been investigated on single-crystal samples as a function of temperature and at zero and 0.5 T magnetic fields. The conductivity has been evaluated by Kramers-Kronig analysis in the frequency range of 100{endash}20000 cm{sup {minus}1}. The broad peak in the optical conductivity, observed at room temperature around 10000 cm{sup {minus}1}, shifts towards zero as the ferromagnetic state develops at lower temperatures. In the transition regime the application of moderate magnetic field also induces a downward shift of the spectral weight. {copyright} {ital 1999} {ital The American Physical Society}

Authors:
;  [1];  [2]; ; ;  [3]
  1. Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794-3800 (United States)
  2. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
  3. Department of Chemistry, Rutgers University, Piscataway, New Jersey 08854-8087 (United States)
Publication Date:
OSTI Identifier:
292717
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 59; Journal Issue: 1; Other Information: PBD: Jan 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LANTHANUM COMPOUNDS; MAGNETORESISTANCE; LANTHANUM OXIDES; MANGANESE OXIDES; REFLECTIVITY; KRAMERS-KRONIG CORRELATION; OPTICAL REFLECTION; TEMPERATURE DEPENDENCE; MAGNETIC FIELDS

Citation Formats

Golovanov, V, Mihaly, L, Homes, C O, McCarroll, W H, Ramanujachary, K V, and Greenblatt, M. Temperature and magnetic field dependent optical spectral weight in the cation-deficient colossal-magnetoresistance material La{sub 0.936}Mn{sub 0.982}O{sub 3}. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.59.153.
Golovanov, V, Mihaly, L, Homes, C O, McCarroll, W H, Ramanujachary, K V, & Greenblatt, M. Temperature and magnetic field dependent optical spectral weight in the cation-deficient colossal-magnetoresistance material La{sub 0.936}Mn{sub 0.982}O{sub 3}. United States. doi:10.1103/PhysRevB.59.153.
Golovanov, V, Mihaly, L, Homes, C O, McCarroll, W H, Ramanujachary, K V, and Greenblatt, M. Fri . "Temperature and magnetic field dependent optical spectral weight in the cation-deficient colossal-magnetoresistance material La{sub 0.936}Mn{sub 0.982}O{sub 3}". United States. doi:10.1103/PhysRevB.59.153.
@article{osti_292717,
title = {Temperature and magnetic field dependent optical spectral weight in the cation-deficient colossal-magnetoresistance material La{sub 0.936}Mn{sub 0.982}O{sub 3}},
author = {Golovanov, V and Mihaly, L and Homes, C O and McCarroll, W H and Ramanujachary, K V and Greenblatt, M},
abstractNote = {The optical reflectivity of a vacancy doped colossal magnetoresistance material La{sub 0.936}Mn{sub 0.982}O{sub 3} has been investigated on single-crystal samples as a function of temperature and at zero and 0.5 T magnetic fields. The conductivity has been evaluated by Kramers-Kronig analysis in the frequency range of 100{endash}20000 cm{sup {minus}1}. The broad peak in the optical conductivity, observed at room temperature around 10000 cm{sup {minus}1}, shifts towards zero as the ferromagnetic state develops at lower temperatures. In the transition regime the application of moderate magnetic field also induces a downward shift of the spectral weight. {copyright} {ital 1999} {ital The American Physical Society}},
doi = {10.1103/PhysRevB.59.153},
journal = {Physical Review, B: Condensed Matter},
number = 1,
volume = 59,
place = {United States},
year = {1999},
month = {1}
}