Abstract
Eu/Mn and Eu/Yb superlattices were grown by the molecular beam epitaxy technique. X-ray diffraction and in situ reflection high-energy electron diffraction observations revealed that the Mn layers were always present in an amorphous state, while the Eu layers changed from amorphous to [110]-oriented crystal with a textured structure as the thickness increased. The high temperature bcc-Yb phase was stabilized by the epitaxial relationship with Eu layers. Amorphous Eu/Mn superlattices with short periodicity cooled under zero-field possesed magnetic-frozen states associated with the Eu interlayer interaction and interfacial interaction between the Eu and Mn layers.
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