Anomalous Transferred Hyperfine Coupling in CeCu2Si2

Autor:	Hiroshi Yasuoka, Tetsuo Ohama, D. Mandrus, James L. Smith, Zachary Fisk
Rok vydání:	1995
Předmět:	Materials science Condensed matter physics Energy level splitting Intermetallic General Physics and Astronomy Condensed Matter::Strongly Correlated Electrons Knight shift Physics::Atomic Physics Electron Anisotropy Magnetic susceptibility Hyperfine structure Magnetic field
Zdroj:	Journal of the Physical Society of Japan. 64:2628-2635
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.64.2628
Popis:	The magnetic susceptibility and the Cu and Si Knight shifts have been measured in CeCu 2 Si 2 . The transferred hyperfine couplings at both the sites are strongly temperature-dependent and noticeably anisotropic at low temperatures. The negative hyperfine couplings observed for the magnetic field along the c -axis at the low temperatures are anomalous as in Ce intermetallic compounds. It is pointed out that the transferred hyperfine coupling due to the hybridization of the f electrons with the ligand s electrons can be anisotropic and also can reverse its sign at the lower temperatures than the crystal-field splitting energy. It is concluded that this hybridization is the dominant mechanism of the transferred hyperfine coupling and responsible for the anomaly.
Databáze:	OpenAIRE
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