English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Influence of nanoscale order-disorder transitions on the magnetic properties of Heusler compounds for spintronics

Karel, J., Fischer, J. E., Fabbrici, S., Pippel, E., Werner, P., Vinicius Castergnaro, M., et al. (2017). Influence of nanoscale order-disorder transitions on the magnetic properties of Heusler compounds for spintronics. Journal of Materials Chemistry C, 5(18), 4388-4392. doi:10.1039/c7tc01241a.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Karel, J.1, Author           
Fischer, J. E.2, Author           
Fabbrici, S.3, Author
Pippel, E.3, Author
Werner, P.3, Author
Vinicius Castergnaro, M.3, Author
Adler, P.4, Author           
Ouardi, S.5, Author           
Balke, B.3, Author
Fecher, G. H.6, Author           
Morais, J.3, Author
Albertini, F.3, Author
Parkin, S. S. P.3, Author
Felser, C.7, Author           
Affiliations:
1Julie Karel, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863434              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3External Organizations, ou_persistent22              
4Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863435              
5Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863439              
6Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
7Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

Content

show
hide
Free keywords: -
 Abstract: Modifications in nanoscale chemical order are used to tune the magnetic properties, namely T-C, of Co2FeSixAl1-x (0 < x < 1). High-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) with Z-contrast reveals nanoscale regions of L2(1) order within a B2 matrix in the off-stoichiometry samples. Perhaps surprisingly, the latter, more chemically disordered structure, exhibits a higher T-C. Upon annealing, the off-stoichiometry samples become more homogeneous with the fraction of L2(1) order decreasing. The short-range order was also investigated using X-ray absorption fine structure (XAFS) measurements at the Co and Fe K edges. Since the local atomic environments of Co atoms in the L2(1) and B2 structures are identical, the features presented in the Co K edge XAFS data are the same in both cases. By contrast, the L2(1) and B2 structures exhibit different signatures at the Fe K edge owing to the different chemical environments. Fitting of these spectra confirms the nanoscale chemical disorder observed by HAADF-STEM and the expected role this disorder plays on T-C. Our results point to a methodology that might be extended to modify the magnetic and electronic properties of any Heusler compound; chemical disorder can be an engineering tool to realize highly tailored properties.

Details

show
hide
Language(s): eng - English
 Dates: 2017-04-202017-04-20
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000401103000005
DOI: 10.1039/c7tc01241a
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Materials Chemistry C
  Other : Journal of Materials Chemistry C: Materials for Optical and Electronic Devices
  Abbreviation : J. Mater. Chem. C
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 5 (18) Sequence Number: - Start / End Page: 4388 - 4392 Identifier: ISSN: 2050-7526
CoNE: https://pure.mpg.de/cone/journals/resource/2050-7526