Abstract
The effects of amorphization on ferromagnetic uranium compounds UGe 2 and UGa 2 were investigated. The amorphous alloys a-UGe 2 and a-UGa 2 were successfully produced by radio frequency (RF) sputtering. The ferromagnetic exchange of a-UGe 2 is comparable with the crystalline compound. On the contrary, the ordering temperature and the magnetic moment of a-UGa 2 are strongly reduced. The magnetic responses and the electron-transport properties of the alloys are different from those of the ferromagnetic crystalline counterparts, because the collinear spin arrangement was scattered by the random anisotropy originating from the orbital angular momentum of uranium ions.
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