Long Range Antiferromagnetic Ordering Observed Below 20 mK in the Heavy Fermion Superconductor UPt_3

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概要

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• Ultralow-temperattrre rueutron scattering experiments have been carried out in order to sttndythe antiferromagnetic ordering in the heavy ferunion superconductor UPt3. We observed the(0.5 0 1) antiferrornagnetic peak below 5 K. We found a finite spin correlation length of about300 A above 50 rnK. The peak intensity increases linearly xvith decreasing temperature, andis suppressed below the supercondtrcting transition temperattrre of abotrt 0.56 K. The rnomentsize of 0.04 ps/XI was estinaated from the peak intensity. These behaviors are in full agreementwith results of previous studies. Strrprisingly, the antiferromagnetic peak exhibits considerablenarrowing below 50 mK, and a resoltrtion-limited peak is observed below 20 mK. This is directevidence that the antiferrouaaagnetic long-range ordering is realized in UPt3 at ultralow temper-attrres.

• 社団法人日本物理学会の論文
• 1998-04-15

著者

• METOKI Naoto

  Advanced Research Center, Japan Atomic Energy Research Institute

• YAMAMOTO Etsuji

  Advanced Science Research Center, Japan Atomic Energy Research Institute

• ONUKI Yoshichika

  Advanced Science Research Center, Japan Atomic Energy Research Institute

• KIMURA Noriaki

  Graduate School of Science and Center for Low Temperature Science, Tohoku University

• MAEZAWA Kunihiko

  Faculty of Engineering,Toyama Prefectural University

• KOIKE Yoshihiro

  Advanced Science Reseach Center, Japan Atomic Energy Reserach Institute

• Kohori Y

  Chiba Univ. Chiba

• KIMURA Noriaki

  Center for Low Temperature Science, Tohoku University

• Kimura Noriaki

  Physics Department Graduate School Of Science Tohoku University

• Kimura Noriaki

  Center For Low Temperature Science Tohoku University

• Karaki Y

  Department Of Material Physics Faculty Of Engineering Science Osaka University

• Mori N

  Advanced Science Research Center Japan Atomic Energy Agency

• HAGA Yosinori

  Advanced Science Research Center,Japan Atomic Energy Research Institute

• Yamamoto Etsuji

  Advanced Science Research Center Japan Atomic Energy Agency

• Maezawa Kunihiko

  Faculty Of Engineering Toyama Prefectural University

• Metoki Naoto

  Advanced Research Center Japan Atomic Energy Research Institute

• Koike Yoshihiro

  Advanced Science Research Center Japan Atomic Energy Research Institute

• Haga Yosinori

  Advanced Science Research Center Japan Atomic Energy Research Institute

• Matsushita Kazuyuki

  Division Of Physics Graduate School Of Science Hokkaido University

• Kawasaki Y

  Department Of Quantum Materials Science University Of Tokushima

• Kimura N

  Graduate School Of Science And Center For Low Temperature Science Tohoku University

• Mori Nobuo

  Institute Of Solid State Physics University Of Tokyo

• ONUKI Yoshichika

  Advanced Science Research Center, Japan Atomic Energy Agency:Department of Physics, Graduate School of Science, Osaka University

• KITAOKA Yoshio

  Department of Material Physics, Faculty of Engineering Science Osaka University

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