Interesting history effect in the magnetotransport properies of La0.55Ho0.15Sr0.3MnOz films on LaAlO3

Details Interesting history effect in the magnetotransport properies of La0.55Ho0.15Sr0.3MnOz films on LaAlO3 Interesting history effect in the magnetotransport properies of La0.55Ho0.15Sr0.3MnOz films on LaAlO3

1999-05-11

arxiv.org/abs/cond-mat/9905142v1

Physics

Condensed Matter

Materials Science

8 pages+3 figures (submitted to Solid State Commun.)

Scientific paper

We report the magnetoresistance measurements of a highly oriented La0.55Ho0.15Sr0.3MnOz film on LaAlO3 substrate. The film has a metal-insulator transition around 200 K and shows pronounced thermomagnetic history effect in its transport properties below 45 K at 7 Tesla. The irreversibility temperature shifts to lower temperatures when the field is reduced. This behaviour is opposite to the thermomagnetic history effect observed in the magnetisation. At 2.8 K one also observes a significant hysteresis in the resistance versus field curve. We propose a qualitative explanation for these observations.

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