Phase control of La2CuO4 in thin film synthesis

A. Tsukada, Tine Greibe, M. Naito

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The lanthanum copper oxide, La2CuO4, which is an end member of the prototype high-T-c superconductors (La,Sr)(2)CuO4 and (La,Ba)(2)CuO4, crystallizes in the K2NiF4 structure in high-temperature bulk synthesis. The crystal chemistry, however, predicts that La2CuO4 is at the borderline of the K2NiF4 stability and that it can crystallize in the Nd2CuO4 structure at low synthesis temperatures. In this article we demonstrate that low-temperature thin-film synthesis actually crystallizes La2CuO4 in the Nd2CuO4 structure. We also show that the phase control of K2NiF4-type La2CuO4 versus Nd2CuO4-type La2CuO4 can be achieved by varying the synthesis temperature and using different substrates.
Original languageEnglish
Article number184515
JournalPhysical Review B Condensed Matter
Volume66
Issue number18
Number of pages5
ISSN0163-1829
DOIs
Publication statusPublished - 2002
Externally publishedYes

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