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Temperature evolution of itinerant ferromagnetism in SrRuO3 probed by optical spectroscopy.
Jeong, D W; Choi, Hong Chul; Kim, Choong H; Chang, Seo Hyoung; Sohn, C H; Park, H J; Kang, T D; Cho, Deok-Yong; Baek, S H; Eom, C B; Shim, J H; Yu, J; Kim, K W; Moon, S J; Noh, T W.
Afiliação
  • Jeong DW; Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
  • Choi HC; Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea.
  • Kim CH; Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
  • Chang SH; Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
  • Sohn CH; Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
  • Park HJ; Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
  • Kang TD; Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
  • Cho DY; Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
  • Baek SH; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Eom CB; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Shim JH; Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea and Division of Advanced Nuclear Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea.
  • Yu J; Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
  • Kim KW; Department of Physics, Chungbuk National University, Cheongju 361-763, Korea.
  • Moon SJ; Department of Physics, Hanyang University, Seoul 133-791, Korea.
  • Noh TW; Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
Phys Rev Lett ; 110(24): 247202, 2013 Jun 14.
Article em En | MEDLINE | ID: mdl-25165956
ABSTRACT
The temperature (T) dependence of the optical conductivity spectra σ(ω) of a single crystal SrRuO(3) thin film is studied over a T range from 5 to 450 K. We observed significant T dependence of the spectral weights of the charge transfer and interband d-d transitions across the ferromagnetic Curie temperature (T(c) ∼ 150 K). Such T dependence was attributed to the increase in the Ru spin moment, which is consistent with the results of density functional theory calculations. T scans of σ(Ω,T) at fixed frequencies Ω reveal a clear T(2) dependence below T(c), demonstrating that the Stoner mechanism is involved in the evolution of the electronic structure. In addition, σ(Ω,T) continues to evolve at temperatures above T(c), indicating that the local spin moment persists in the paramagnetic state. This suggests that SrRuO(3) is an intriguing oxide system with itinerant ferromagnetism.
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2013 Tipo de documento: Article
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Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2013 Tipo de documento: Article