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Data for Fermi-surface topologies and low-temperature phases of the filled skutterudite compounds CeOs4Sb12 and NdOs4Sb12
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Ho, Pei Chun, Singleton, John, Goddard, Paul, Balakirev, F. F., Shalinee , Chikara, Yanagisawa, Tatsuya, Maple, M. Brian, Shrekenhamer, David B., Lee, Xia and Thomas, Avraham T. (2016) Data for Fermi-surface topologies and low-temperature phases of the filled skutterudite compounds CeOs4Sb12 and NdOs4Sb12. [Dataset]
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Abstract
MHz conductivity, torque magnetometer and magnetization measurements are reported on single crystals of CeOs4Sb12 and NdOs4Sb12 using temperatures down to 0.5 K and magnetic fields of up to 60 tesla. The field-orientation dependence of the de Haas-van Alphen and Shubnikov-de Haas oscillations is deduced by rotating the samples about the [010] and [0¯11] directions. The results indicate that NdOs4Sb12 has a similar Fermi surface topology to that of the unusual superconductor PrOs4Sb12, but with significantly smaller effective masses, supporting the importance of local phonon modes in contributing to the low-temperature heat capacity of NdOs4Sb12. By contrast, CeOs4Sb12 undergoes a field-induced transition from an unusual semimetal into a high-field, hightemperature state characterized by a single, almost spherical Fermi-surface section. The behavior of the phase boundary and comparisons with models of the bandstructure lead us to propose that the field-induced phase transition in CeOs4Sb12 is similar in origin to the well-known α − γ transition in Ce and its alloys.
| Item Type: | Dataset | |||||||||||||||||||||||||||||||||
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| Subjects: | Q Science > QC Physics | |||||||||||||||||||||||||||||||||
| Divisions: | Faculty of Science > Physics | |||||||||||||||||||||||||||||||||
| Type of Data: | Plain text .dat and readme.txt contained in .zip | |||||||||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Skutterudite, Fermi surfaces, Superconductors, Semimetals | |||||||||||||||||||||||||||||||||
| Publisher: | Physics Department, University of Warwick | |||||||||||||||||||||||||||||||||
| Official Date: | 16 December 2016 | |||||||||||||||||||||||||||||||||
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| Status: | Not Peer Reviewed | |||||||||||||||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||||||||||||||
| Access rights to Published version: | Open Access | |||||||||||||||||||||||||||||||||
| Description: | Data from SQUID measurements of magnetic susceptibility vs temperature of CeOs4Sb12 Data was taken at the following applied fields (oersteds) 500 mass of sample = 15.3 mg These data were used in conjunction with pulsed-field measurements to construct Figure 5(c) |
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