Surface electronic phase transition in colossal magnetoresistive manganese perovskites: La0.65Sr0.35MnO3

Hani Dulli, E. W. Plummer, P. A. Dowben, Jaewu Choi, Sy-Hwang Liou

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Abstract

We have observed a distinct surface phase transition for an important class of giant magnetoresistance materials [La1 - xSrxMnO3(x=0.35)]. The surface phase transition occurs at 240 K compared to 370 K for the bulk and is fundamentally different. In the bulk, a ferromagnetic metal to paramagnetic bad-metal transition occurs, while the lower-temperature surface transition is from an insulator to a semimetal. The surface of this manganese perovskite is electronically and compositionally quite different from the bulk with important implications for the behavior of artificially grown layered transition-metal oxides and for the use of surface sensitive techniques to probe the bulk.

Original languageEnglish (US)
Pages (from-to)570-572
Number of pages3
JournalApplied Physics Letters
Volume77
Issue number4
DOIs
Publication statusPublished - Jul 24 2000

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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