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 language | English (US) |
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Pages (from-to) | 570-572 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 77 |
Issue number | 4 |
DOIs | |
State | Published - Jul 24 2000 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)