High field magnetoresistance and de Haas-van Alphen effect in antiferromagnetic PrB/sub 6/ and NdB/sub 6/

Technical Report · Sat Aug 01 04:00:00 EDT 1987

DOI:https://doi.org/10.2172/6419453· OSTI ID:6419453

Onuki, Y; Umezawa, A; Kwok, W K; Crabtree, G W; Nishihara, M; Yamazaki, T; Omi, T; Komatsubara, T

The transport properties and the de Haas-van Alphen (dHvA) effect have been measured for antiferromagnetic PrB/sub 6/ and NdB/sub 6/. The number of conduction electrons is approximately one per unit cell. The magnetoresistance shows the existence of open orbits implying a multiply connected Fermi surface. The angular dependence of the magnetoresistance is roughly similar to that of the reference material, LaB/sub 6/. The dHvA data in PrB/sub 6/ shows both paramagnetic and antiferromagnetic Fermi surfaces. The antiferromagnetic Fermi surface arises from new magnetic Brillouin zone boundaries and antiferromagnetic gaps introduced by the magnetic order, and the paramagnetic Fermi surface from magnetic breakdown through the small antiferromagnetic gaps in high field. Hybridization between the conduction electrons and the f electrons has been observed through the cyclotron masses, which in PrB/sub 6/ are three times larger than the corresponding masses of LaB/sub 6/. In NdB/sub 6/ only the antiferromagnetic Fermi surface, quite different from those of LaB/sub 6/ and PrB/sub 6/, has been observed. 26 refs., 10 figs., 3 tabs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6419453
• Report Number(s): ANL/PPRNT-89-147; ON: DE89008457
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANTIFERROMAGNETISM
BORIDES
BORON COMPOUNDS
DE HAAS-VAN ALPHEN EFFECT
HYBRIDIZATION
LANTHANUM BORIDES
LANTHANUM COMPOUNDS
MAGNETISM
NEODYMIUM BORIDES
NEODYMIUM COMPOUNDS
PRASEODYMIUM BORIDES
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
TEMPERATURE DEPENDENCE
TRANSPORT THEORY