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Metallic conductivity and a Ca substitution study of NaRh2 O4 comprising a double chain system

Journal Article


Abstract


  • The metallic compound NaRh2 O4 forms a full range solid solution to the insulating phase CaRh2 O4. At a Na concentration of 0.25 mole per formula unit, we found an unexpected contribution to the specific heat at low temperature [K. Yamaura, et al., Chem. Mater. 17 (2005) 359]. To address this issue, specific heat and AC and DC magnetic susceptibilities were additionally measured under a variety of conditions for the Na0.25 sample. A new set of data clearly indicate the additional specific heat is magnetic in origin; however, the magnetic entropy is fairly small ( ∼ 1 % of Schottky term for a simple splitting doublet), and there is no other evidence to suggest that a magnetic phase transition is responsible for the anomalous specific heat. © 2006 Elsevier B.V. All rights reserved.

Publication Date


  • 2006

Citation


  • Yamaura, K., Huang, Q., Moldovan, M., Young, D. P., Wang, X. L., & Takayama-Muromachi, E. (2006). Metallic conductivity and a Ca substitution study of NaRh2 O4 comprising a double chain system. Physica B: Condensed Matter, 378-380(SPEC. ISS.), 1134-1135. doi:10.1016/j.physb.2006.01.454

Scopus Eid


  • 2-s2.0-33646394584

Start Page


  • 1134

End Page


  • 1135

Volume


  • 378-380

Issue


  • SPEC. ISS.

Abstract


  • The metallic compound NaRh2 O4 forms a full range solid solution to the insulating phase CaRh2 O4. At a Na concentration of 0.25 mole per formula unit, we found an unexpected contribution to the specific heat at low temperature [K. Yamaura, et al., Chem. Mater. 17 (2005) 359]. To address this issue, specific heat and AC and DC magnetic susceptibilities were additionally measured under a variety of conditions for the Na0.25 sample. A new set of data clearly indicate the additional specific heat is magnetic in origin; however, the magnetic entropy is fairly small ( ∼ 1 % of Schottky term for a simple splitting doublet), and there is no other evidence to suggest that a magnetic phase transition is responsible for the anomalous specific heat. © 2006 Elsevier B.V. All rights reserved.

Publication Date


  • 2006

Citation


  • Yamaura, K., Huang, Q., Moldovan, M., Young, D. P., Wang, X. L., & Takayama-Muromachi, E. (2006). Metallic conductivity and a Ca substitution study of NaRh2 O4 comprising a double chain system. Physica B: Condensed Matter, 378-380(SPEC. ISS.), 1134-1135. doi:10.1016/j.physb.2006.01.454

Scopus Eid


  • 2-s2.0-33646394584

Start Page


  • 1134

End Page


  • 1135

Volume


  • 378-380

Issue


  • SPEC. ISS.