Field-induced Ferromagnetic Correlation in the Metamagnetic Crossover in CeRu2Si2as Studied by Neutron Scattering

Autor:	Susumu Katano, Naoto Metoki, Shuzo Kawarazaki, Y. Koike, Masugu Sato, Hiroaki Kadowaki
Rok vydání:	2004
Předmět:	Physics Reciprocal lattice Paramagnetism Condensed matter physics General Physics and Astronomy Condensed Matter::Strongly Correlated Electrons Neutron Inelastic scattering Neutron scattering Excitation Inelastic neutron scattering Metamagnetism
Zdroj:	Journal of the Physical Society of Japan. 73:3418-3421
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.73.3418
Popis:	Neutron inelastic scattering experiments have been performed on the paramagnetic heavy fermion compound CeRu 2 Si 2 in magnetic field along the crystal c -axis. Around the metamagnetic crossover field H m =7.7 T, the quasi-elastic excitation in the vicinity of the reciprocal lattice point (110) with an energy of 0.4 meV is significantly enhanced at T =0.4 K. The result indicates that the metamagnetic crossover in this compound is associated with a field-induced ferromagnetic correlation. The observation is consistent with the recent theoretical prediction by Satoh and Ohkawa based on quasi-particle band spectrum considerations.
Databáze:	OpenAIRE
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