English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Chemical Synthesis and Characterization of gamma-Co2NiGa Nanoparticles with a Very High Curie Temperature

MPS-Authors
/persons/resource/persons130205

Wang,  Changhai
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons138558

Levin,  Aleksandr A.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons129684

Qian,  Jinfeng
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126894

ViolBarbosa,  Carlos E.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126789

Ouardi,  Siham
Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126680

Karel,  J.
Julie Karel, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126541

Borrmann,  Horst
Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126599

Fecher,  Gerhard H.
Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126601

Felser,  Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Wang, C., Levin, A. A., Nasi, L., Fabbrici, S., Qian, J., ViolBarbosa, C. E., et al. (2015). Chemical Synthesis and Characterization of gamma-Co2NiGa Nanoparticles with a Very High Curie Temperature. Chemistry of Materials, 27(20), 6994-7002. doi:10.1021/acs.chemmater.5b02227.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0029-1D9B-9
Abstract
We report the first study on the chemical preparation, structural characterization, and magnetic properties of Co2NiGa nanopartides (NPs) of a single gamma-phase (gamma-Co2NiGa). The gamma-Co2NiGa NPs were prepared by impregnation in colloidal silica followed by high temperature annealing under hydrogen atmosphere. The crystal structure of tetragonal gamma-Co2NiGa was confirmed by selected area electron and X-ray diffraction studies. Energy-dispersive X-ray spectroscopy mapping and X-ray absorption near edge structure data provided evidence for the successful preparation of the intermetallic NPs and the absence of Co, Ni, Co-Ni, or metal-containing impurity phases. Extended X-ray absorption fine structure spectroscopy data confirmed the formation of the gamma-Co2NiGa phase by examining the atomic environments surrounding Co, Ni, and Ga. The Co2NiGa NPs are ferromagnetic with a high saturation magnetization, which is consistent with the theoretical model. gamma-Co2NiGa NPs exhibit a very high Curie temperature (approximate to J1139 K), which make them promising candidates for high temperature magnetically activated nanoscale devices.