Rocksalt NdO (001) epitaxial thin films were synthesized. Contrary to paramagnetic NdO bulk polycrystal in previous studies, NdO epitaxial thin films showed ferromagnetism with a Curie temperature of 19.1 ±{} 1.8 K, originating from dominant direct Nd{-}Nd exchange interaction owing to the small intercationic distance. In addition, negative magnetoresistance and an anomalous Hall effect were observed.
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Saito et al. (2019) studied this question.
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