Resisitivity, thermopower, and susceptibility of RNiO3 (R=La,Pr)

X. Q. Xu, J. L. Peng, Z. Y. Li, H. L. Ju, R. L. Greene

Research output: Contribution to journalArticle

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Abstract

We report the resistivity, thermopower, and dc susceptibility of RNiO3 (R=La,Pr) ceramic samples for 1.4 K≤T≤300 K. The resistivity of LaNiO3 shows a T2 dependence below 80 K and changes over to a T1.5 dependence at higher temperature (100-300 K). The resistivity of PrNiO3 exhibits a metal-insulator transition at TMI=130 K with a linear temperature dependence above TMI. The thermopower of both LaNiO3 and PrNiO3 is linear and negative in the metallic region. The susceptibility of LaNiO3 is Pauli-like with a Curie-Weiss contribution at low temperature. The Pauli term is enhanced well above the free-electron value. Our samples have smaller resistivity and larger resistivity ratio than previously reported. Thermogravimetric analysis shows that there is excess oxygen (δ>0) in our samples of LaNiO3+δ, which suggests that the oxygen content of LaNiO3 is important for its physical properties.

Original languageEnglish
Pages (from-to)1112-1118
Number of pages7
JournalPhysical Review B
Volume48
Issue number2
DOIs
Publication statusPublished - 1993 Jan 1

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Thermoelectric power
magnetic permeability
electrical resistivity
Oxygen
Metal insulator transition
Temperature
Thermogravimetric analysis
Physical properties
oxygen
Electrons
free electrons
physical properties
insulators
ceramics
temperature dependence
metals

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Xu, X. Q. ; Peng, J. L. ; Li, Z. Y. ; Ju, H. L. ; Greene, R. L. / Resisitivity, thermopower, and susceptibility of RNiO3 (R=La,Pr). In: Physical Review B. 1993 ; Vol. 48, No. 2. pp. 1112-1118.
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Resisitivity, thermopower, and susceptibility of RNiO3 (R=La,Pr). / Xu, X. Q.; Peng, J. L.; Li, Z. Y.; Ju, H. L.; Greene, R. L.

In: Physical Review B, Vol. 48, No. 2, 01.01.1993, p. 1112-1118.

Research output: Contribution to journalArticle

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N2 - We report the resistivity, thermopower, and dc susceptibility of RNiO3 (R=La,Pr) ceramic samples for 1.4 K≤T≤300 K. The resistivity of LaNiO3 shows a T2 dependence below 80 K and changes over to a T1.5 dependence at higher temperature (100-300 K). The resistivity of PrNiO3 exhibits a metal-insulator transition at TMI=130 K with a linear temperature dependence above TMI. The thermopower of both LaNiO3 and PrNiO3 is linear and negative in the metallic region. The susceptibility of LaNiO3 is Pauli-like with a Curie-Weiss contribution at low temperature. The Pauli term is enhanced well above the free-electron value. Our samples have smaller resistivity and larger resistivity ratio than previously reported. Thermogravimetric analysis shows that there is excess oxygen (δ>0) in our samples of LaNiO3+δ, which suggests that the oxygen content of LaNiO3 is important for its physical properties.

AB - We report the resistivity, thermopower, and dc susceptibility of RNiO3 (R=La,Pr) ceramic samples for 1.4 K≤T≤300 K. The resistivity of LaNiO3 shows a T2 dependence below 80 K and changes over to a T1.5 dependence at higher temperature (100-300 K). The resistivity of PrNiO3 exhibits a metal-insulator transition at TMI=130 K with a linear temperature dependence above TMI. The thermopower of both LaNiO3 and PrNiO3 is linear and negative in the metallic region. The susceptibility of LaNiO3 is Pauli-like with a Curie-Weiss contribution at low temperature. The Pauli term is enhanced well above the free-electron value. Our samples have smaller resistivity and larger resistivity ratio than previously reported. Thermogravimetric analysis shows that there is excess oxygen (δ>0) in our samples of LaNiO3+δ, which suggests that the oxygen content of LaNiO3 is important for its physical properties.

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