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Structure and magnetism of Co2CrAl Heusler alloy films

Dubowik J., Gościańska I., Kudryavtsev Y. V., Oksenenko V. A.

Materials Science Poland

2007

Vol. 25, No. 4

1281--1287

We report on magnetic properties of Co2CrAl thin films. Low-field magnetization measurements show that the films with the best B2/L21 structure exhibit ferromagnetic order below the Curie temperature TC ??330-340 K and below 200 K they exhibit magnetic characteristics suggesting the presence of antiferromagnetic ordering. Our ferromagnetic resonance measurements confirm a complex magnetic phase diagram of Co2CrAl due to a disorder between Co and Cr sites in nominally L21 or B2 structures.