Structure and physical properties of single crystal PrCr2Al20 and CeM2Al20 (M=V, Cr): A comparison of compounds adopting the CeCr2Al20 structure type

Crystal growth and full structure determination of compounds adopting the CeCr2Al20 structure type, LnTi2Al20 (Ln=La–Pr, Sm, and Yb), LnV2Al20 (Ln=La–Pr, and Sm), and LnCr2Al20 (Ln=La–Pr, Sm, and Yb), are reported. Resistivity, magnetic susceptibility, and heat capacity of flux grown single crystals...

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Bibliographic Details
Published in:Journal of solid state chemistry 2012-12, Vol.196, p.274-281
Main Authors: Kangas, Michael J., Schmitt, Devin C., Sakai, Akito, Nakatsuji, Satoru, Chan, Julia Y.
Format: Article
Language:English
Subjects:
CeCr2Al20
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Crystal growth
Electrical resistivity
Electronic conduction in metals and alloys
Electronic transport in condensed matter
Exact sciences and technology
Flux
Heat capacity
Inorganic compounds
Intermetallics
Kondo effect
Magnetic permeability
Magnetic properties and materials
Magnetic susceptibility
Physical properties
Physics
Quadrupolar order
Scattering mechanisms and kondo effect
Single crystals
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
Studies of specific magnetic materials
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Summary:Crystal growth and full structure determination of compounds adopting the CeCr2Al20 structure type, LnTi2Al20 (Ln=La–Pr, Sm, and Yb), LnV2Al20 (Ln=La–Pr, and Sm), and LnCr2Al20 (Ln=La–Pr, Sm, and Yb), are reported. Resistivity, magnetic susceptibility, and heat capacity of flux grown single crystals of the nonmagnetic CeM2Al20 (Ln=Ce, Yb; M=Ti, V) compounds are compared to PrCr2Al20. Of particular interest is PrCr2Al20 which does not show any phase transition down to the lowest temperature of the measurement (400mK in resistivity measurement and 1.8K for magnetic susceptibility measurements) and exhibits Kondo behavior at low temperatures. Crystal structure of SmV2Al20 showing the interpenetrating diamond-like samarium network and pyrochlore-like vanadium network. [Display omitted] ► Single crystals of LnM2Al20 were grown from a molten aluminum flux. ► Magnetic, electrical, and specific heat of single crystal LnM2Al20 are presented. ► PrCr2Al20 exhibits evidence of Kondo effect.
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2012.06.035