Fluorination of La2NiO4 and La2CuO4+δ

Bhat, V. ; Rao, C. N. R. ; Honig, J. M. (1992) Fluorination of La2NiO4 and La2CuO4+δ Solid State Communications, 81 (9). pp. 751-756. ISSN 0038-1098

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/003810...

Related URL: http://dx.doi.org/10.1016/0038-1098(92)90782-5

Abstract

We have carried out fluorination on La2NiO4 and La2CuO4+δ. Only a small fraction of fluorine enters the bulk; the rest resides on the surface. The cuprate after fluorination exhibits greater departures from tetragonal symmetry than the parent material and transforms at ~40 K to the superconducting state. By contrast, the nickelate deviates less from tetragonal symmetry upon fluorination; no superconductivity was observed down to 4.2 K.

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