A Study of Structure, Electric and Magnetic Properties of the New Layered Cobalt Oxides Sr2Y1-xCaxCo2Q7-z

K. Yamaura, Q. Huang, R. W. Erwin, J. W. Lynn, R. J. Cava

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

The crystal structure of Sr2Y0.8Ca0.2Co2O6 is orthorhombic below 270 K (Immm, a = 3.84029(7) Å, b = 3.80691(6) Å and c = 19.4980(3) Å at 20 K), transformed from tetragonal (I4/mmm, a = 3.82765(6) Å and c = 19.5795(3) Å) at 295 K. The crystal structure distortion is accompanied by an anomalous temperature dependence of the degree of buckling of the CoO2plane and is correlated with the development of anisotropic antiferromagnetic ordering of magnetic moments (2.93(2) μBper Co at 20 K). A magnetically glassy state below about 35 K and variable range hopping conduction below about 64 K for Sr2Y1-xCaxCo3.4+2O 7-z (0.2 ≤ x ≤ 0.5, 0.21 ≤ z ≤ 0.38) were found by magnetic susceptibility and electrical resistivity measurements.

Original languageEnglish (US)
Pages (from-to)849-853
Number of pages5
JournalJournal of Low Temperature Physics
Volume117
Issue number3-4
DOIs
StatePublished - 1999

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'A Study of Structure, Electric and Magnetic Properties of the New Layered Cobalt Oxides Sr<sub>2</sub>Y<sub>1-x</sub>Ca<sub>x</sub>Co<sub>2</sub>Q<sub>7-z</sub>'. Together they form a unique fingerprint.

  • Cite this