Observation of a low-symmetry crystal structure for superconducting (formula presented) by Ni K-edge x-ray absorption measurements

Document Type

Article

Publication Date

2-28-2003

Abstract

The local atomic structure of (formula presented) has been determined over the temperature range of 3 to 300 K by Ni K-edge x-ray absorption fine structure measurements. No anomalies were observed near (formula presented) However, below (formula presented) the symmetry of (formula presented) octahedra is lower than the cubic (formula presented) determined by conventional diffraction measurements. We suggest that the onset of local distortions could be closely related with removal of the degeneracy in the electronic states dominated by the Ni d bands. The results are discussed in relation to nuclear magnetic resonance, x-ray photoemission measurements, and the superconductivity. © 2003 The American Physical Society.

Identifier

85038935036 (Scopus)

Publication Title

Physical Review B Condensed Matter and Materials Physics

External Full Text Location

https://doi.org/10.1103/PhysRevB.67.064509

e-ISSN

1550235X

ISSN

10980121

Issue

6

Volume

67

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