Itinerant antiferromagnetism in the nearly-heavy-fermion compound NpSn3
Physical Review B, ISSN: 0163-1829, Vol: 33, Issue: 6, Page: 3803-3809
1986
- 46Citations
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Metrics Details
- Citations46
- Citation Indexes46
- CrossRef46
- 45
Article Description
NpSn3, with a paramagnetic electronic specific-heat coefficient γ, of 242 mJ/mol K2, undergoes an antiferromagnetic phase transition at 9.5 K with a resultant drop in γ to 88 mJ/mol K2. This behavior of γ (reduction by 64%) is typical of the "heavier" fermion antiferromagnets U2Zn17, UCd11, and CePb3. Self-consistent linear-augmented-plane-wave calculations within the local-density approximation have been performed for both phases to study this effect. The calculations include both spin-orbit and magnetic coupling on the same level throughout the self-consistency process. An electronic specific-heat coefficient of 102 mJ/mol K2 is found for the paramagnetic phase-the largest value ever reported from a band-structure calculation. This large value implies that large enhancements observed in other heavy-fermion materials are not present in NpSn3. A specific-heat coefficient of 39.7 mJ/mol K2 was found for the antiferromagnetic phase, yielding a calculated 61% reduction in γ as a consequence of undergoing the phase transition. A total moment of 0.21μB was obtained (-0.18 spin, 0.39 orbital) indicating the itinerant nature of the magnetism. An analysis of the dramatic reduction in electronic specific heat through the transition, as well as the temperature dependence of C/T in the paramagnetic phase, is presented along with a discussion of the implications for the other heavy-fermion antiferromagnets. © 1986 The American Physical Society.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=25944474577&origin=inward; http://dx.doi.org/10.1103/physrevb.33.3803; http://www.ncbi.nlm.nih.gov/pubmed/9938793; https://link.aps.org/doi/10.1103/PhysRevB.33.3803; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.33.3803/fulltext; http://link.aps.org/article/10.1103/PhysRevB.33.3803
American Physical Society (APS)
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