Document Detail

Hyperfine splitting and room-temperature ferromagnetism of ni at multimegabar pressure.
MedLine Citation:
PMID:  24160629     Owner:  NLM     Status:  In-Data-Review    
Magnetic and elastic properties of Ni metal have been studied up to 260 GPa by nuclear forward scattering of synchrotron radiation with the 67.4 keV Mössbauer transition of ^{61}Ni. The observed magnetic hyperfine splitting confirms the ferromagnetic state of Ni up to 260 GPa, the highest pressure where magnetism in any material has been observed so far. Ab initio calculations reveal that the pressure evolution of the hyperfine field, which features a maximum in the range of 100 to 225 GPa, is a relativistic effect. The Debye energy obtained from the Lamb-Mössbauer factor increases from 33 meV at ambient pressure to 60 meV at 100 GPa. The change of this energy over volume compression is well described by a Grüneisen parameter of 2.09.
I Sergueev; L Dubrovinsky; M Ekholm; O Yu Vekilova; A I Chumakov; M Zając; V Potapkin; I Kantor; S Bornemann; H Ebert; S I Simak; I A Abrikosov; R Rüffer
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Publication Detail:
Type:  Journal Article     Date:  2013-10-10
Journal Detail:
Title:  Physical review letters     Volume:  111     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-10-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  157601     Citation Subset:  IM    
Deutsches Elektronen-Synchrotron, D-22607 Hamburg, Germany.
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