Ferromagnetic Mixed-Valence and Kondo-Lattice State in TmTe at High Pressure
Identifieur interne : 001225 ( Pascal/Corpus ); précédent : 001224; suivant : 001226Ferromagnetic Mixed-Valence and Kondo-Lattice State in TmTe at High Pressure
Auteurs : P. Link ; I. N. Goncharenko ; J. M. Mignot ; T. Matsumura ; T. SuzukiSource :
- Physical review letters [ 0031-9007 ] ; 1998-01-05.
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- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Neutron diffraction experiments on TmTe at pressures up to 7 GPa are reported. The semiconductor-to-metal transition occurring above 2 GPa in this compound is accompanied by the appearance of strong ferromagnetic exchange interactions producing a Curie temperature as high as 14 K. This behavior is characteristic for the incipient mixed-valence regime just above the transition pressure and traced back to the release of a small concentration of free charge carriers in the material. The steep decrease of both the Curie temperature and the ordered magnetic moment occurring at higher pressures emphasizes the role of Kondo fluctuations, and raises the interesting possibility that a quantum transition to a nonmagnetic ground state of mixed-valence Tm might take place around 6 GPa.
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NO : | PASCAL 98-0179835 AIP |
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ET : | Ferromagnetic Mixed-Valence and Kondo-Lattice State in TmTe at High Pressure |
AU : | LINK (P.); GONCHARENKO (I. N.); MIGNOT (J. M.); MATSUMURA (T.); SUZUKI (T.) |
AF : | Laboratoire Leon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif sur Yvette, France (0 aut.); Russian Research Center Kurchatov Institut, 123182 Moscow, Russia (0 aut.); Department of Physics, Tohoku University, Sendai 980-77, Japan (0 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Physical review letters; ISSN 0031-9007; Coden PRLTAO; Etats-Unis; Da. 1998-01-05; Vol. 80; No. 1; Pp. 173-176 |
LA : | Anglais |
EA : | Neutron diffraction experiments on TmTe at pressures up to 7 GPa are reported. The semiconductor-to-metal transition occurring above 2 GPa in this compound is accompanied by the appearance of strong ferromagnetic exchange interactions producing a Curie temperature as high as 14 K. This behavior is characteristic for the incipient mixed-valence regime just above the transition pressure and traced back to the release of a small concentration of free charge carriers in the material. The steep decrease of both the Curie temperature and the ordered magnetic moment occurring at higher pressures emphasizes the role of Kondo fluctuations, and raises the interesting possibility that a quantum transition to a nonmagnetic ground state of mixed-valence Tm might take place around 6 GPa. |
CC : | 001B70E30M; 001B70A30; 001B70E30E; 001B70E50P |
FD : | 7530M; 7130; 7530E; 7550P; Etude expérimentale; Thulium tellurure; Effet Kondo; Valence; Diffraction neutron; Dépendance pression; Très haute pression; Transformation phase; Interaction échange; Moment magnétique; Point Curie |
ED : | Experimental study; Thulium tellurides; Kondo effect; Valence; Neutron diffraction; Pressure dependence; Very high pressure; Phase transformations; Exchange interactions; Magnetic moments; Curie point |
LO : | INIST-8895 |
ID : | 98-0179835 |
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Pascal:98-0179835Le document en format XML
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<author><name sortKey="Link, P" sort="Link, P" uniqKey="Link P" first="P." last="Link">P. Link</name>
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<author><name sortKey="Matsumura, T" sort="Matsumura, T" uniqKey="Matsumura T" first="T." last="Matsumura">T. Matsumura</name>
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<author><name sortKey="Suzuki, T" sort="Suzuki, T" uniqKey="Suzuki T" first="T." last="Suzuki">T. Suzuki</name>
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<front><div type="abstract" xml:lang="en">Neutron diffraction experiments on TmTe at pressures up to 7 GPa are reported. The semiconductor-to-metal transition occurring above 2 GPa in this compound is accompanied by the appearance of strong ferromagnetic exchange interactions producing a Curie temperature as high as 14 K. This behavior is characteristic for the incipient mixed-valence regime just above the transition pressure and traced back to the release of a small concentration of free charge carriers in the material. The steep decrease of both the Curie temperature and the ordered magnetic moment occurring at higher pressures emphasizes the role of Kondo fluctuations, and raises the interesting possibility that a quantum transition to a nonmagnetic ground state of mixed-valence Tm might take place around 6 GPa.</div>
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<server><NO>PASCAL 98-0179835 AIP</NO>
<ET>Ferromagnetic Mixed-Valence and Kondo-Lattice State in TmTe at High Pressure</ET>
<AU>LINK (P.); GONCHARENKO (I. N.); MIGNOT (J. M.); MATSUMURA (T.); SUZUKI (T.)</AU>
<AF>Laboratoire Leon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif sur Yvette, France (0 aut.); Russian Research Center Kurchatov Institut, 123182 Moscow, Russia (0 aut.); Department of Physics, Tohoku University, Sendai 980-77, Japan (0 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Physical review letters; ISSN 0031-9007; Coden PRLTAO; Etats-Unis; Da. 1998-01-05; Vol. 80; No. 1; Pp. 173-176</SO>
<LA>Anglais</LA>
<EA>Neutron diffraction experiments on TmTe at pressures up to 7 GPa are reported. The semiconductor-to-metal transition occurring above 2 GPa in this compound is accompanied by the appearance of strong ferromagnetic exchange interactions producing a Curie temperature as high as 14 K. This behavior is characteristic for the incipient mixed-valence regime just above the transition pressure and traced back to the release of a small concentration of free charge carriers in the material. The steep decrease of both the Curie temperature and the ordered magnetic moment occurring at higher pressures emphasizes the role of Kondo fluctuations, and raises the interesting possibility that a quantum transition to a nonmagnetic ground state of mixed-valence Tm might take place around 6 GPa.</EA>
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<ED>Experimental study; Thulium tellurides; Kondo effect; Valence; Neutron diffraction; Pressure dependence; Very high pressure; Phase transformations; Exchange interactions; Magnetic moments; Curie point</ED>
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