Scaling of Spin-Wave Stiffness Constant to Curie Temperature in the Colossal Magnetoresistance Material La_{<b>1</b>-<i><i>x</i></i>}Sr_{<i><i>x</i></i>}MnO_<b>3</b>

• Endoh Yasuo

  Department of Physics, Tohoku University, Sendai 980–77

• Hirota Kazuma

  Department of Physics, Tohoku University, Sendai 980–77

書誌事項

タイトル別名

• Scaling of Spin-Wave Stiffness Constant to Curie Temperature in the Colossal Magnetoresistance Material La1-xSrxMnO3.
• Scaling of Spin-Wave Stiffness Constant

抄録

The spin dynamics of La_1-xSr_xMnO₃ for Sr concentrations of x ≤ 0.3 were studied by inelastic neutron scattering. For the entire concentration range studied, we found that the spin-wave stiffness constant D and the paramagnetic spin-diffusion constant A^* are ruled by the nearest neighbor interaction, i.e., the strength of double exchange interactions. The Sr concentration dependence of both the constants, D and A^*, scale that of the Curie temperature T_C very well, and the ratios T_CMF/T_C (T_CMF: Mean field T_C determined from D) and A^*/T_C fit in the universal table for typical transition metal ferromagnets.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 66 (8), 2264-2267, 1997

  一般社団法人 日本物理学会

キーワード

• La<SUB>1-x</SUB>Sr<SUB>x</SUB>MnO<SUB>3</SUB>
• colossal magnetoresistance (CMR)
• double-exchange model
• spin wave
• paramagnetic scattering
• transition metal ferromagnet

詳細情報

• CRID: 1390001204179854208
• NII論文ID: 210000100268
• NII論文ID: 110001970519
• NII論文ID: 130004536169
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.66.2264
• BIBCODE: 1997JPSJ...66.2264E
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 4287717
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4287717
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.66.2264
• 本文言語コード: en
• データソース種別:
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