1H-NMR spin-lattice relaxation rate of the quantum spin system (CH3)2CHNH3Cu(Cl[x]Br1-x)3 with x = 0 and 0.35

• Oosawa Akira

  Department of Physics, Sophia University

• Suzuki Takao

  Advanced Meson Science Laboratory, RIKEN Nishina Center

• Kanada Keishi

  Department of Physics, Sophia University

• Kojima Satoshi

  Department of Physics, Sophia University

• Goto Takayuki

  Department of Physics, Sophia University

• Manaka Hirotaka

  Graduate School of Science and Engineering, Kagoshima University

書誌事項

タイトル別名

• <SUP>1</SUP>H-NMR Spin–Lattice Relaxation Rate of the Quantum Spin System (CH<SUB>3</SUB>)<SUB>2</SUB>CHNH<SUB>3</SUB>Cu(Cl<I><SUB>x</SUB></I>Br<SUB>1−<I>x</I></SUB>)<SUB>3</SUB> with <I>x</I>=0 and 0.35
• ¹H-NMR Spin–Lattice Relaxation Rate of the Quantum Spin System (CH₃)₂CHNH₃Cu(Cl_<i>x</i>Br_1-<i>x</i>)₃ with <i>x</i>=0 and 0.35

抄録

The spin–lattice relaxation rate T₁⁻¹ of ¹H-NMR has been measured in (CH₃)₂CHNH₃Cu(Cl_xBr_1−x)₃ with x=0 and 0.35, in order to investigate their microscopic magnetism. Previous macroscopic magnetization and specific heat measurements suggested that these two exist in a singlet-dimer phase. The temperature dependence of T₁⁻¹ in an x=0 system decreased exponentially toward zero, providing microscopic evidence of a gapped singlet ground state, which is consistent with results of macroscopic experiments. At the same time, in the x=0.35 system, T₁⁻¹ showed a sharp peak structure at approximately 7.5 K but no splitting of ¹H-NMR spectra, indicative of magnetic ordering. We discuss the observed sharp peak structure in the x=0.35 system with the soft mode toward the exotic magnetic ground state suggested by recent μSR experiments.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 78 (5), 053702-053702, 2009

  一般社団法人 日本物理学会

キーワード

• (CH<SUB>3</SUB>)<SUB>2</SUB>CHNH<SUB>3</SUB>Cu(Cl<I><SUB>x</SUB></I>Br<SUB>1−<I>x</I></SUB>)<SUB>3</SUB>
• quantum spin system
• spin gap
• bond randomness
• <SUP>1</SUP>H-NMR
• spin–lattice relaxation rate <I>T</I><SUB>1</SUB><SUP>−1</SUP>

詳細情報

• CRID: 1390001204196609024
• NII論文ID: 130005437466
• NII論文ID: 10025960051
• NII論文ID: 210000107788
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.78.053702
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 10225024
• Web Site: http://id.ndl.go.jp/bib/10225024
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10225024
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.78.053702
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
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