Antiferromagnetism at the YBa2Cu3O7 / La2/3Ca1/3MnO3 interface

Details Antiferromagnetism at the YBa2Cu3O7 / La2/3Ca1/3MnO3 interface Antiferromagnetism at the YBa2Cu3O7 / La2/3Ca1/3MnO3 interface

2004-03-03

arxiv.org/abs/cond-mat/0403113v1

Physics

Condensed Matter

Materials Science

12 pages, 2 figures, 1 table, submitted to Applied Physics Letters

Scientific paper

10.1063/1.1741038

The magnetic properties of a series of YBa2Cu3O7-x/La2/3Ca1/3MnO3 (YBCO/LC1/3MO) superlattices grown by dc sputtering at high oxygen pressures (3.5 mbar) show the expected ferromagnetic behaviour. However, field cooled hysteresis loops at low temperature show the unexpected existence of exchange bias, effect associated with the existence of ferromagnetic/antiferromagnetic (F/AF) interfaces. The blocking temperature (TB) is found thickness dependent and the exchange bias field (HEB) is found inversely proportional to the FM layer thickness, as expected. The presence of an AF material is probably associated to interface disorder and Mn valence shift towards Mn4+.

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