Ni Impurity Effect on Antiferromagnetic Order in Hole-doped La_2-<i>x</i>Sr_<i>x</i>CuO₄

• Hiraka H.

  Institute for Materials Research, Tohoku University

• Machi T.

  Superconductivity Research Laboratory, International Superconductivity Technology Center

• Watanabe N.

  Superconductivity Research Laboratory, International Superconductivity Technology Center

• Itoh Y.

  Department of Chemistry, Graduate School of Science, Kyoto University

• Matsuda M.

  Advanced Science Research Center, Japan Atomic Energy Research Institute

• Yamada K.

  Institute for Materials Research, Tohoku University

書誌事項

タイトル別名

• Ni Impurity Effect on Antiferromagnetic Order in Hole-doped La2-xSrxCuO4

抄録

The doping effect of magnetic impurities on the lightly hole-doped antiferromagnetic state was investigated by neutron diffraction techniques using single crystals of La_1.99Sr_0.01Cu_1−yNi_yO₄ (0.01≤y≤0.10). Dilute Ni-doping between y=0.02 and 0.05 dramatically changes the Q-dependence of the antiferromagnetic Bragg intensity, corresponding to a switch of spin structure from the La₂CuO₄ type (Cu type) to the La₂NiO₄ type (Ni type) triggered by a spin rotation in CuO₂ planes. Upon Ni-doping, the Néel temperature (T_N) increases and rapidly approaches that of nondoped La₂CuO₄ in the Cu-type phase due to the strong localization of doped carriers, whereas T_N gradually decreases in the Ni-type phase. More interestingly, between the Cu- and Ni-type structures, there exists an intermediate region where the spin direction is between those of Cu- and Ni-types. In this region, we found an unusual temperature dependence of magnetic intensities, which suggests a temperature dependence of the spin direction. These unusual behaviors are discussed in terms of doped carrier itinerancy.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 74 (8), 2197-2200, 2005

  一般社団法人 日本物理学会

キーワード

• La<SUB>2−<I>x</I></SUB>Sr<I><SUB>x</SUB></I>CuO<SUB>4</SUB>
• magnetic structure
• neutron diffraction
• substitution effect
• Ni
• Néel temperature

詳細情報

• CRID: 1390001204187993088
• NII論文ID: 210000105579
• NII論文ID: 110001979690
• NII論文ID: 130004539379
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.74.2197
• BIBCODE: 2005JPSJ...74.2197H
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 7393923
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7393923
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.74.2197
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可