Resistivity and thermopower of CaB6 single crystal

K. Yagasaki, S. Notsu, Y. Shimoji, T. Nakama, R. Kaji, T. Yokoo, Jun Akimitsu, M. Hedo, Y. Uwatoko

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The resistivity p and thermopower S of CaB6 single crystal have been measured at temperatures from 2 to 1100 K in magnetic fields up to 15 T. Temperature dependence of ρ is expressed as [ρ(T)-ρ(0)]oc exp[-(T/T)1/2] for T≤90 K and T1.7 for 90 K≤ T≤1100 K, where p0 = 232 μΩ cm. The magnitude of ρ and S is very large suggesting thin concentration of carriers. The temperature dependence of them suggests the conduction is metallic and electron type. ρ and S can be fitted on the basis of free electron model and obtained the Fermi level is situated near the bottom of an electron band with the Fermi energy of 80 K. The experimental and fitting results show this compound is semi-metallic. No scattering anomalies in temperature dependence of ρ were observed and also no sudden change of the Fermi surface accompanied with magnetic transition in S above 100 K including the region where it might be considered to have ferromagnetic transition.

Original languageEnglish
Pages (from-to)1259-1260
Number of pages2
JournalPhysica B: Condensed Matter
Volume329-333
Issue numberII
DOIs
Publication statusPublished - May 2003
Externally publishedYes

Fingerprint

Thermoelectric power
Single crystals
temperature dependence
electrical resistivity
single crystals
Fermi level
Electrons
Temperature
free electrons
Fermi surfaces
Fermi surface
electrons
Electron transitions
anomalies
conduction
Scattering
Magnetic fields
scattering
magnetic fields
temperature

Keywords

  • Magnetism
  • Resistivity
  • Semi-metal
  • Thermopower

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Yagasaki, K., Notsu, S., Shimoji, Y., Nakama, T., Kaji, R., Yokoo, T., ... Uwatoko, Y. (2003). Resistivity and thermopower of CaB6 single crystal. Physica B: Condensed Matter, 329-333(II), 1259-1260. https://doi.org/10.1016/S0921-4526(02)02217-2

Resistivity and thermopower of CaB6 single crystal. / Yagasaki, K.; Notsu, S.; Shimoji, Y.; Nakama, T.; Kaji, R.; Yokoo, T.; Akimitsu, Jun; Hedo, M.; Uwatoko, Y.

In: Physica B: Condensed Matter, Vol. 329-333, No. II, 05.2003, p. 1259-1260.

Research output: Contribution to journalArticle

Yagasaki, K, Notsu, S, Shimoji, Y, Nakama, T, Kaji, R, Yokoo, T, Akimitsu, J, Hedo, M & Uwatoko, Y 2003, 'Resistivity and thermopower of CaB6 single crystal', Physica B: Condensed Matter, vol. 329-333, no. II, pp. 1259-1260. https://doi.org/10.1016/S0921-4526(02)02217-2
Yagasaki K, Notsu S, Shimoji Y, Nakama T, Kaji R, Yokoo T et al. Resistivity and thermopower of CaB6 single crystal. Physica B: Condensed Matter. 2003 May;329-333(II):1259-1260. https://doi.org/10.1016/S0921-4526(02)02217-2
Yagasaki, K. ; Notsu, S. ; Shimoji, Y. ; Nakama, T. ; Kaji, R. ; Yokoo, T. ; Akimitsu, Jun ; Hedo, M. ; Uwatoko, Y. / Resistivity and thermopower of CaB6 single crystal. In: Physica B: Condensed Matter. 2003 ; Vol. 329-333, No. II. pp. 1259-1260.
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N2 - The resistivity p and thermopower S of CaB6 single crystal have been measured at temperatures from 2 to 1100 K in magnetic fields up to 15 T. Temperature dependence of ρ is expressed as [ρ(T)-ρ(0)]oc exp[-(T/T)1/2] for T≤90 K and T1.7 for 90 K≤ T≤1100 K, where p0 = 232 μΩ cm. The magnitude of ρ and S is very large suggesting thin concentration of carriers. The temperature dependence of them suggests the conduction is metallic and electron type. ρ and S can be fitted on the basis of free electron model and obtained the Fermi level is situated near the bottom of an electron band with the Fermi energy of 80 K. The experimental and fitting results show this compound is semi-metallic. No scattering anomalies in temperature dependence of ρ were observed and also no sudden change of the Fermi surface accompanied with magnetic transition in S above 100 K including the region where it might be considered to have ferromagnetic transition.

AB - The resistivity p and thermopower S of CaB6 single crystal have been measured at temperatures from 2 to 1100 K in magnetic fields up to 15 T. Temperature dependence of ρ is expressed as [ρ(T)-ρ(0)]oc exp[-(T/T)1/2] for T≤90 K and T1.7 for 90 K≤ T≤1100 K, where p0 = 232 μΩ cm. The magnitude of ρ and S is very large suggesting thin concentration of carriers. The temperature dependence of them suggests the conduction is metallic and electron type. ρ and S can be fitted on the basis of free electron model and obtained the Fermi level is situated near the bottom of an electron band with the Fermi energy of 80 K. The experimental and fitting results show this compound is semi-metallic. No scattering anomalies in temperature dependence of ρ were observed and also no sudden change of the Fermi surface accompanied with magnetic transition in S above 100 K including the region where it might be considered to have ferromagnetic transition.

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