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Mössbauer studies of rare earth-iron hydrides, carbides, and nitrides

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Abstract

The basic principles of Mössbauer spectroscopy are introduced in the context of magnetically ordered alloys. A description of fitting procedures is presented, emphasizing the use of information derived from other techniques and indicating reliability limits. Ways in which the local structural and magnetic information obtained from Mossbauer spectroscopy can be used to probe the effects of hydrogen, carbon, and nitrogen additions in R2Fe17 alloys are presented, as well as how to distinguish local and global changes. Even apparently large-scale effects, such as a change in the magnetic easy direction, are shown to have clear local signatures. A new hybrid carbonitride of the 2-17 alloy series is introduced, which combines superior magnetic properties with enhanced thermal stability. The coherent two-phase structure of this material, revealed by Mössbauer spectroscopy, is used to emphasize the different information obtained from local and bulk measurements.

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  1. Centre for the Physics of Materials and Department of Physics, McGill University, Montreal, Quebec, Canada

    D. H. Ryan, X. Chen & Z. Altounian

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  1. D. H. Ryan
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  2. X. Chen
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  3. Z. Altounian
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Ryan, D.H., Chen, X. & Altounian, Z. Mössbauer studies of rare earth-iron hydrides, carbides, and nitrides. JMEP 2, 225–233 (1993). https://doi.org/10.1007/BF02660290

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