Magnetic and structural properties of high-coercivity Pr₂Fe₁₄BPr cosputtered films

Authors

K.D. Aylesworth, University of Nebraska - Lincoln
David J. Sellmyer, University of Nebraska-LincolnFollow
George C. Hadjipanayis, Kansas State UniversityFollow

Date of this Version

5-1-1990

Comments

Published by American Institute of Physics. J. Applied Physics 67, 5725 (1990). ©1990 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

The results of structural and magnetic measurements on a series of films produced by cosputtering Pr₂₁Fe₇₂B₇ and Pr are reported. The materials were deposited serially, 10–200 Å at a time, onto 700 °C Ta substrates attached to a computer-controlled stepping motor. The structure of the resulting films was examined by large- and small-angle x-ray diffraction, scanning electron microscopy, and by microprobe analysis. Magnetic measurements were made at temperatures from 4.2 to 300 K, in fields up to 80 kOe in a vibrating sample magnetometer. The films appear to consist of 1-µm grains of Pr₂Fe₁₄B with their c axes oriented perpendicular to the film plane, surrounded by a Pr-rich phase. The maximum room-temperature coercivity discovered so far is almost 20 kOe, which is close to the values reported for bulk Pr₂Fe₁₄B magnets. Journal of Applied Physics is copyrighted by The American Institute of Physics.