Superconductivity and Magnetism of the New Heavy Fermion Superconductors UM_2Al_3(M=Ni, Pd) : ^<27>Al NMR Study
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概要
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The magnetic ar?d superconducting properties of' tlve new heavy fermioua supercon-ductors (HFS), UNi.A1, and UPd.AI, have beer? investigated by "Al NMR. Themagnetic ordering is unambiguously identified by a significant increase of "ANlinewidth below T.= 4.6 K and an enhancement of' the nuclear-spin-lattice relaxatiorarate "(1 / T.) arouxxcl T. in UNi.A1. and by a gradual increase of tlve linewidth and adistinct drop of "(l / T,) below T.= 14 K in UPd.A1,. Below I.=0.9 K in a magneticfield of 2.8 k0e, no anomalies of 1 /T. and Kx?ight shift laave been observecl inUNi,Al, whereas the superconductivity in UPd.Al, is well evidenced by a significantdecrease of both 1 / T, and Knight shift below T.= 1 .8 K in 4.9 kOe. Tlve behavior ofI / T. in UPd.A1, with no coherence peak just below T., is well described down to0.65 K by a model of gap zeros on lines at the Fern?i surface, being quite similar to tlvebehavior in HFS reported thus far.
- 社団法人日本物理学会の論文
- 1992-08-15
著者
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KITAOKA Yoshio
Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka Universit
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Geibel Christoph
Max-planck Institute For Chemical Physics Of Solids
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Asayama Kunisuke
Department of Material Physics, Faculty of Engineering Science, Osaka University
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Asayama Kunisuke
Department Of Physical Science Graduate School Of Engineering Science Osaka University
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Asayama Kunisuke
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Geibel C
Max‐planck Inst. Chemical Physics Of Solids Dresden Deu
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Steglich F
Max-planck Institute For Chemical Physics Of Solids
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Kohori Y
Chiba Univ. Chiba
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KYOGAKU Masafumi
Department of Material Physics,Faculty of Engineering Science,Osaka University
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Karaki Y
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Kitaoka Yoshio
Graduate School Of Engineering Science Osaka University
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Kitaoka Yoshio
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Geibel Christoph
Institute fur Festkorperphysik, Technishe Hochschule, Darmstadt
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Schank Christina
Institute fur Festkorperphysik, Technishe Hochschule, Darmstadt
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Steglich Frank
Institute fur Festkorperphysik, Technishe Hochschule, Darmstadt
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Steglich Frank
Institut Fur Festkorperphysik Technische Hochschule
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Kyogaku Masafumi
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Schank Christina
Institute Fur Festkorperphysik Technishe Hochschule Darmstadt
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