Magnetic field dependence of the cyclotron effective mass in the Kondo lattice CeB/sub 6/

Journal Article · Fri Apr 15 04:00:00 EDT 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.340595· OSTI ID:5418234

Joss, W; van Ruitenbeek, J M; Crabtree, G W; Tholence, J L; van Deursen, A P.J.; Fisk, Z

We report the first observation of a field-dependent mass in a hybridizing f-electron system. CeB/sub 6/ is an ordered moment heavy fermion system with an electronic specific heat coefficient ..gamma.. of order 225--300 mJ/mole K/sup 2/. Using the de Haas--van Alphen effect at temperatures as low as 60 mK in steady magnetic fields as large as 22 T, we observe a cyclotron orbit of frequency 8680 T for fields along the (100) direction. The mass of this orbit was measured at eight fixed fields and found to decrease from 18m/sub e/ to 8m/sub e/ as the field increases from 12 to 22 T. The observed Fermi surface is very similar to that of LaB/sub 6/, indicating that the f-electrons are largely local rather than itinerant in CeB/sub 6/, a picture confirmed by bandstructure calculations. The observed field dependence of the cyclotron mass is consistent with the low-energy scale of the system as measured, for example, by the Kondo temperature. Our results are compared with Fermi surface observations in other heavy fermion systems.

• Research Organization: Max Planck Institut fuer Festkoerperforschung, Hochfeld Magnetlabor, B. P. 166X, F-38042 Grenoble Cedex, France
• OSTI ID: 5418234
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 63:8; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
BORIDES
BORON COMPOUNDS
CERIUM BORIDES
CERIUM COMPOUNDS
CYCLOTRON RESONANCE
DE HAAS-VAN ALPHEN EFFECT
EFFECTIVE MASS
ENERGY LEVELS
FERMI LEVEL
KONDO EFFECT
MAGNETIC FIELDS
MASS
RARE EARTH COMPOUNDS
RESONANCE