Nonmagnetic Impurity Effects on S=1/2 Heisenberg Ladder Cu_2(C_5H_<12>N_2)_2Cl_4

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概要

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• lVIagnetic meastrreuaaents have been performed to investigate nontnagnetic iraaptrrity effects ona Zn-doped ladder system (CLII-.ZI1.)2(C5H12N2)2Cl4. The pararnagnetic contribution in thesusceptibility X' of the Zn-doped systena incre?tses with incre?tsing x below the gap tezmpera-tture. The susceptibility obeys the Ctrrie law in the temperattrre range between 0.5 K and 2 K.However, at tenaperattmres below 0,5 K, 7y,'T drops with decreasing temperature, which sttggeststhe crossover in the Curie constant as predicted by Sigrist and Furusaki [J. Phys. Soc. Jpn. 65(1996) 2385]. Magnetization curves of' the Zn-doped systenta are compared with that of the ptrresystem. The impurity-induced spin behaves like a paramagnetic .5=l/2 spin and the spin-gapstate survives even in the Zn-doped systern with the content x trp to 0.117. These restrlts seemto originate frona the weak interladder interaction of the systeraa.

• 社団法人日本物理学会の論文
• 1998-11-15

著者

• NOJIRI Hiroyuki

  Institute for Materials Research, Tohoku University

• KAWAE Tatsuya

  Department of Applied Quantum Physics, Kyushu University

• TAKEDA Kazuyoshi

  Department of Applied Quantum Physics, Kyushu University

• MOTOKAWA Mitsuhiro

  Institute for Materials Research, Tohoku University

• Deguchi Hiroyuki

  Department of Applied Science, Faculty of Engineering, Kyushu University

• SAKON Takuo

  Institute for Materials Research, Tohoku University

• Nojiri Hiroyuki

  Institute For Material Research Tohoku University

• Sasaki T

  Center For Geo-environmental Science Faculty Of Engineering And Resource Science Akita University

• MITO Masaki

  Department of Electronics, Faculty of Engineering, Kyushu Institute of Technology

• TAKAGI Seishi

  Department of Electronics, Faculty of Engineering, Kyushu Institute of Technology

• Suzuki N

  Riken (inst. Physical And Chemical Res.) Saitama

• Motokawa Mitsuhiro

  Institute For Materials Research Tohoku University

• Sakon Takuo

  Institute For Materials Research Tohoku University

• Takagi Seishi

  Department Of Electrical Engineering Faculty Of Engineering Osaka University:department Of Electrica

• Deguchi Hiroyuki

  Department Of Applied Science Faculty Of Engineering Kyushu University

• Kawae Tatsuya

  Department Of Applied Quantum Physics Kyushu University

• Motokawa Mitsuhiro

  Crest Japan Science And Technology:institute For Material Research Tohoku University

• SUMOTO Shunsaku

  Department of Electronics,Faculty of Engineering,Kyushu Institute of Technology

• Sasagawa Takao

  Graduate School Of Frontier Sciences University Of Tokyo

• Takeda Kazuyoshi

  Department Of Applied Quantum Physics Faculty Of Engineering Kyushu University:institute Of Environm

• Sumoto Shunsaku

  Department Of Electronics Faculty Of Engineering Kyushu Institute Of Technology

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