Thermodynamic and transport properties of single-crystal Yb{sub 14}MnSb{sub 11}

Journal Article · Tue Jun 01 00:00:00 EDT 1999 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.59.13829· OSTI ID:348259

Fisher, I R; Wiener, T A; Budko, S L; Canfield, P C ^[1]; Chan, J Y; Kauzlarich, S M ^[2]

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1. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
2. Department of Chemistry, One Shields Avenue, University of California, Davis, California 95616 (United States)

Relatively large (up to 250 mg) single crystals of the intermetallic compound Yb{sub 14}MnSb{sub 11} have been prepared by a flux-growth technique. The results of thermodynamic and transport measurements of these samples are presented. The compound orders ferromagnetically at approximately T{sub C}=53{plus_minus}1K, with a magnetization consistent with the assignment Mn{sup 3+} (3d{sup 4}) and Yb{sup 2+} (4f{sup 14}). The Mn moments are local in nature, with the full effective and saturated moment of the Hund{close_quote}s rule spin-only ground state. The electrical resistivity has a metallic temperature dependence, with only a modest anisotropy. Room-temperature values of the resistivity are relatively high for an intermetallic compound: 1630{plus_minus}160 {mu}{Omega}cm and 1250{plus_minus}130 {mu}{Omega}cm for currents flowing approximately parallel and perpendicular to the {ital c} axis, respectively. There is a distinct loss of spin-disorder scattering in the resistivity at T{sub C}. From the heat capacity, a rough estimation of the magnetic entropy gives {Delta}S{sub M}{approx}12.1 J/mol K, the value in reasonable agreement with the expected {Delta}S{sub M}{approx}R ln 5 from the assignment of these moments. All of these data are consistent with a picture of Mn{sup 3+} local moments being coupled via conduction electrons. To this end, Yb{sub 14}MnSb{sub 11} appears to be analogous to local-moment rare-earth intermetallic compounds, and may point the way toward a class of 3d Kondo lattice compounds. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 348259
• Journal Information: Physical Review, B: Condensed Matter, Vol. 59, Issue 21; Other Information: PBD: Jun 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
THERMODYNAMICS
KONDO EFFECT
MANGANESE ALLOYS
ANTIMONY ALLOYS
YTTERBIUM ALLOYS
SPECIFIC HEAT
ENTROPY
FERROMAGNETIC MATERIALS
GROUND STATES
CHARGED-PARTICLE TRANSPORT
MAGNETIZATION
SPIN
ELECTRIC CONDUCTIVITY