de Haas{endash}van Alphen and Shubnikov{endash}de Haas oscillations in RAgSb{sub 2} (R=Y, La-Nd, Sm)

Journal Article · Mon Nov 01 00:00:00 EST 1999 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.60.13371· OSTI ID:698845

Myers, K D; Budko, S L; Antropov, V P; Harmon, B N; Canfield, P C ^[1]; Lacerda, A H ^[2]

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1. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
2. National High Field Laboratory, Los Alamos Facility, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

de Haas{endash}van Alphen and Shubnikov{endash}de Haas oscillations have been used to study the Fermi surface of the simple tetragonal RAgSb{sub 2} series of compounds with R=Y, La-Nd, and Sm. The high quality of the flux-grown single crystals, coupled with very small extremal cross sections of Fermi surface, allow the observation of quantum oscillations at modest fields (H{lt}30&hthinsp;kG) and high temperatures (up to 25 K in SmAgSb{sub 2}). For H{parallel}c, the effective masses, determined from the temperature dependence of the amplitudes, are quite small, typically between 0.07 and 0.5m{sub 0}. The topology of the Fermi surface was determined from the angular dependence of the frequencies for R=Y, La, and Sm. In SmAgSb{sub 2}, antiferromagnetic ordering below 8.8 K is shown to dramatically alter the Fermi surface. For LaAgSb{sub 2} and CeAgSb{sub 2}, the effect of applied hydrostatic pressure on the frequencies was also studied. Finally, the experimental data were compared to the Fermi surface calculated within the tight-binding linear muffin-tin orbital approximation. Overall, the calculated electronic structure was found to be consistent with the experimental data. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 698845
• Journal Information: Physical Review, B: Condensed Matter, Vol. 60, Issue 19; Other Information: PBD: Nov 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LANTHANUM COMPOUNDS
PRASEODYMIUM COMPOUNDS
FERMI LEVEL
YTTRIUM COMPOUNDS
LANTHANUM CARBIDES
NEODYMIUM COMPOUNDS
SAMARIUM COMPOUNDS
SILVER COMPOUNDS
ANTIMONIDES
SHUBNIKOV-DE HAAS EFFECT
DE HAAS-VAN ALPHEN EFFECT
EFFECTIVE MASS
TEMPERATURE DEPENDENCE
ELECTRONIC STRUCTURE
MUFFIN-TIN POTENTIAL