Research Papers in Physics and Astronomy
Rare-earth—gallium—iron glasses. II. Anomalous magnetic hysteresis in alloys based on Pr, Nd, and Sm
Date of this Version
Giant magnetic coercivity is reported in several metallic glasses of the form (R80G20)100-xFex where R represents Pr, Nd, or Sm, G represents Ga or Au, and 15≤x≤30. An unusual temperature variation of the coercive field is observed showing peaks at intermediate temperatures (≃90 K). In contrast to similar glasses based on heavy rare-earth metals, these glasses exhibit significant chemical short-range order and even phase separation as is shown by the Mössbauer effect and other measurements. The results are consistent with a recent theory which predicts that large coercivity can result from the presence of site-to-site variations in magnetic properties.
Published by American Physical Society. Phys. Rev. B 30, 2857 (1984). http://prb.aps.org. Copyright © 1984 American Physical Society. Permission to use.