Drastic Change of the Magnetic Phase Diagram of Ce_χLa_<1-χ>B_6 between χ=0.75 and 0.5

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概要

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• We have sttrdied the rnaunetoresistance and magnetic tchase diagram of Ce..I,at .Bc;(.r = 0,65,0,7). The antiferrornagnetic (AF) phase IV r'ecently discovered in Ceg.75La0.35B5, xvhere it existsonly in a narrow temperattrre and unargnetic field regiota, extends down to T :l 0 K f'or .r = 0.7.The tn?tgnetoresistance in phase TV is u??trch snaaller than that in the AF phase III dotninatedby the antiferro-qtradrtrpolar (AFQ) ordering. A first-order ph?tse transition takes place at acritical tnagnetic field frona phase IV to III ?tnd that field for H 7 (100) is stnaller than tlaat f'or#7(110). Tlaese can be explained Icy considering the difl'erence of'the free energy in uaaagneticfields between phases TV and III. A tetra-critical poizat seeuns to exist for x : 0.75 btrt it isseparated into two tri-critical points by the TV-II botrndary for H 7 (110) in Ceg..j5Lag.35B5.

• 社団法人日本物理学会の論文
• 1998-01-15

著者

• 世良 正文

  Department Of Quantum Matter Graduate School Of Advanced Sciences Of Matter Hiroshima University

• Kimura S

  Department Of Physics Faculty Of Science Kobe University

• KUNII Satoru

  Department of Physics, Tohoku University

• HIROI Masahiko

  Institute for Materials Research, Tohoku University, Katahira

• SERA Masafumi

  Institute for Materials Research, Tohoku University, Katahira

• Sera M

  Department Of Quantum Matter Graduate School Of Advanced Sciences Of Matter Hiroshima University

• Sera M

  Department Of Quantum Matter Adsm Hiroshima University

• Katano Susumu

  Neutron Scattering Group Advanced Science Research Center Japan Atomic Energy Research Institute

• 佐藤 知矢

  Department Of Physics Faculty Of Science Shinshu University

• Kunii S

  Graduate School Of Science And Technology Niigata University

• Kunii S

  Tohoku Univ. Sendai Jpn

• Sato Ken

  Department Of Physics Faculty Of Science Tohoku University

• Kunii Satoru

  Faculty Of Engineering Tohoku Gakuin University

• Matsui H

  Graduate School Of Science Osaka University

• Sera Masafumi

  Institute For Materials Research Tohoku University

• Noto K

  Institute For Materials Research Tohoku University

• Hiroi Masahiko

  Institute For Materials Recearch Tohoku University

• KOBAYASHI Noriko

  Institute for Materials Research,Tohoku University

• KOBAYASHI Shin-ichiro

  Institute for Materials Research,Tohoku University

• Kobayashi N

  Tohoku Univ. Sendai Jpn

• Kobayashi N

  Institute For Materials Research Tohoku University Katahira

• Kuroiwa S

  Department Of Physics Aoyama Gakuin University

• Sera M

  Institute Of Materials Structure Science High Energy Accelerator Research Organization (kek)

• Kunii Satoru

  Department Of Physics Faculity Of Science Tohoku University

• Kobayashi Norio

  Faculty Of Engineering Iwate University

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