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Single-crystal thin films were prepared by sputtering in a glow discharge system from a ceramic cathode of nickel ferrite onto a magnesium oxide substrate cleaved parallel to the (100) plane. X-ray and election diffraction patterns obtained from the films yield d values which are consistent with values for nickel ferrite spinel. Chemical analysis shows that the iron-to-nickel atom ratio is approximately 2 : 1 as in NiFe?Ol. Magnetic measurements also indicated that the films were single-crystal but the values obtained differ from those of bulk nickel ferrite.

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