Document Detail


Enhanced magnetization in highly crystalline and atomically mixed bcc Fe-Co nanoalloys prepared by hydrogen reduction of oxide composites.
MedLine Citation:
PMID:  23334346     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Fe(x)Co(100-x) nanoalloys (NAs) with 20 ≤ x ≤ 80 were prepared by hydrogen reduction of Fe-Co oxide nano-composites, which were composed of mixed phases (or domains) of Fe(2)O(3) and CoO. In situ X-ray diffraction (XRD) measurements using synchrotron radiation clearly showed development of a solid-solution Fe-Co phase by hydrogen reduction from the oxide composites. High-resolution transmission electron microscopy (TEM), high-angle annular dark-field scanning TEM and powder XRD revealed that Fe-Co NAs form a single crystal structure and the two elements are mixed homogeneously. The saturation magnetization depends on the size and metal composition and shows the highest value (250 emu g(-1)) for the Fe(70)Co(30) NA in the size range of 30-55 nm, which is comparable to that of the Fe(70)Co(30) bulk alloy (245 emu g(-1)). This high magnetization is attributable to high crystallinity and homogeneous mixing of constituent atoms, which are attained by thermal treatment of oxide phases under a hydrogen atmosphere.
Authors:
Md Jafar Sharif; Miho Yamauchi; Shoichi Toh; Syo Matsumura; Shin-Ichiro Noro; Kenichi Kato; Masaki Takata; Tatsuya Tsukuda
Related Documents :
15025476 - Rate of enolate formation is not very sensitive to the hydrogen bonding ability of dono...
12436906 - Nitroxide radicals as hydrogen bonding acceptors. an infrared and epr study.
22176976 - Role of zinc ion for catalytic activity in d-serine dehydratase from saccharomyces cere...
18275186 - Theoretical study of specific hydrogen-bonding effects on the bridging p-or bond streng...
2205256 - An exafs study of the copper accumulated by yeast cells.
19826716 - Zirconium and hafnium complexes of the thio(bisphenolato) ligand: synthesis, structural...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-21
Journal Detail:
Title:  Nanoscale     Volume:  -     ISSN:  2040-3372     ISO Abbreviation:  Nanoscale     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101525249     Medline TA:  Nanoscale     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Catalysis Research Center, Hokkaido University, Nishi 10, Kita 21, Sapporo 001-0021, Japan.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Topobiology of Human Pigmentation: P-Cadherin Selectively Stimulates Hair Follicle Melanogenesis.
Next Document:  Efficient resonance assignment of proteins in MAS NMR by simultaneous intra- and inter-residue 3D co...