Magnetisation and Magneto-Resistance Study of Ferromagnetic Metal/Half Metallic Double Perovskite Bi-Layers

Authors :: McCann, Duncan M.
Williams, Grant V. M.
Hyndman, Adam R.
Stephen, Jibu
Source :: Materials Science Forum; September 2011, Vol. 700 Issue: 1 p33-36, 4p
Publication Year :: 2011
Abstract: We observe a large magneto-resistance in very thin Ba<subscript>2</subscript>FeMoO<subscript>6</subscript> films of ~-12% at 10K, which is not significantly changed when thin NiFe/Ba<subscript>2</subscript>FeMoO<subscript>6</subscript> bi-layers are made. This suggests that the magneto-resistance in both cases is dominated by inter-grain tunnelling in the Ba<subscript>2</subscript>FeMoO<subscript>6</subscript> thin film. There is an anomalous peak in the resistance at ~300K in the bi-layer film that can not be easily explained. However, we know that the temperature where this peak occurs is close to the Ba<subscript>2</subscript>FeMoO<subscript>6</subscript> Curie temperature.

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