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  Size-dependent structural and magnetic properties of chemically synthesized Co-Ni-Ga nanoparticles

Wang, C., Levin, A. A., Karel, J., Fabbrici, S., Qian, J., ViolBarbosa, C. E., et al. (2017). Size-dependent structural and magnetic properties of chemically synthesized Co-Ni-Ga nanoparticles. Nano Research, 10(10), 3421-3433. doi:10.1007/s12274-017-1554-y.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-F4F5-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-F560-C
Genre: Journal Article

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 Creators:
Wang, Changhai1, Author              
Levin, Aleksandr A.2, Author              
Karel, Julie3, Author              
Fabbrici, Simone4, Author
Qian, Jinfeng1, Author              
ViolBarbosa, Carlos E.1, Author              
Ouardi, Siham5, Author              
Albertini, Franca4, Author
Schnelle, Walter6, Author              
Rohlicek, Jan2, Author              
Fecher, Gerhard H.7, Author              
Felser, Claudia8, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
3Julie Karel, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863434              
4External Organizations, ou_persistent22              
5Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863439              
6Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
7Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
8Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Phase transitions and magnetic properties of shape-memory materials can be tailored by tuning the size of the constituent materials, such as nanoparticles. However, owing to the lack of suitable synthetic methods for size-controlled Heusler nanoparticles, there is no report on the size dependence of their properties and functionalities. In this contribution, we present the first chemical synthesis of size-selected Co-Ni-Ga Heusler nanoparticles. We also report the structure and magnetic properties of the biphasic Co-Ni-Ga nanoparticles with sizes in the range of 30-84 nm, prepared by a SBA-15 nanoporous silicatemplated approach. The particle sizes could be readily tuned by controlling the loading and concentration of the precursors. The fractions and crystallite sizes of each phase of the Co-Ni-Ga nanoparticles are closely related to their particle size. Enhanced magnetization and decreased coercivity are observed with increasing particle size. The Curie temperature (T (c)) of the Co-Ni-Ga nanoparticles also depends on their size. The 84 nm-sized particles exhibit the highest T (c) (ae 1,174 K) among all known Heusler compounds. The very high Curie temperatures of the Co-Ni-Ga nanoparticles render them promising candidates for application in high-temperature shape memory alloy-based devices.

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Language(s): eng - English
 Dates: 2017-05-062017-05-06
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000410304500014
DOI: 10.1007/s12274-017-1554-y
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Title: Nano Research
Source Genre: Journal
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Publ. Info: Beijing, China : Tsinghua University Press
Pages: - Volume / Issue: 10 (10) Sequence Number: - Start / End Page: 3421 - 3433 Identifier: ISSN: 1998-0124
CoNE: /journals/resource/1998-0124