A Soft Acoustic Mode in the Ferroelastic Phase Transition of LaNbO4

• Hara Kazuhiro

  Department of Physics, Kyushu University

• Sakai Akira

  Department of Physics, Kyushu University

• Tsunekawa Shin

  The Research Institute for Iron, Steel and Other Metals, Tohoku University

• Sawada Akikatsu

  Synthetic Crystal Research Laboratory, Nagoya University

• Ishibashi Yoshihiro

  Synthetic Crystal Research Laboratory, Nagoya University

• Yagi Toshirou

  Department of Physics, Kyushu University

書誌事項

タイトル別名

• A Soft Acoustic Mode in the Ferroelastic Phase Transition of LaNbO<SUB>4</SUB>
• A Soft Acoustic Mode in the Ferroelasti

抄録

An anisotropic softening of the acoustic mode in the ferroelastic phase transition of LaNbO₄ has been observed by the Brillouin scattering experiment. The transverse mode propagating along a direction deviated from the crystal axis by 23° in the ab-plane shows a complete softening at the transition temperature T₀. The direction is parallel or normal to the ferroelastic domain boundary as predicted by the phenomenological analysis of the phase transition from 4⁄m to 2⁄m symmetry. The temperature dependence of the elastic susceptibility is well described by the classical indices γ=γ′=1 in both phases, suggesting a typical proper ferroelastic transition.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 54 (3), 1168-1172, 1985

  一般社団法人 日本物理学会

キーワード

• General Physics and Astronomy

詳細情報

• CRID: 1390282679163997440
• NII論文ID: 210000091929
• NII論文ID: 110001967292
• NII論文ID: 130003898599
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.54.1168
• BIBCODE: 1985JPSJ...54.1168H
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 3015526
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3015526
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.54.1168
• 本文言語コード: en
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