(alpha)" -Fe16N2 thin films have been prepared by facing-target sputtering.
Their structures, magnetic properties and thermal stability were studied b
y X-ray diffraction (XRD), transmission electron microscope (TEM) and vibra
ting sample magnetometer (VSM). It was found that the saturation magnetizat
ion (M-s) of alpha " -Fe16N2 decreases with increasing temperature, and at
about 523 K, a sudden change was observed, which can be attributed to the d
ecomposition of alpha " -Fe16N2 into alpha -Fe and gamma ' -Fe4N.