Enhanced magnetic transition of core-shell cobalt-platinum nanoalloys

Jong Il Park; Nam Jung Kang; Sang Min Lee; Sehun Kim; S. J. Oh; H. C. Ri; Jinwoo Cheon

doi:10.1557/proc-721-e5.8

Enhanced magnetic transition of core-shell cobalt-platinum nanoalloys

Jong Il Park, Nam Jung Kang, Sang Min Lee, Sehun Kim, S. J. Oh, H. C. Ri, Jinwoo Cheon

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

Synthesis of 'Solid solution' and 'Core-shell' types of well defined Co-Pt based nanoalloys smaller than 10nm have been achieved by redox transmetalation reactions. This redox transmetalation are selectively observed only if the redox potential between two metals is favorable. The composition of the magnetic alloys can also be tuned by adjusting the ratio of reactants. Annealed core-shell nanoparticles transformed into mixed nanoalloys with face centered tetragonal (fct) structures, which show large coercivity and ferromagnetism at room temperature. These nanoparticles can potentially be used as an independent single magnetic bit of tera-bit information storage. Also, this kind of redox transmetalation reaction can be utilized as a general process to synthesize various types of nanoalloys with controlled composition in a selective fashion.

Original language	English
Pages (from-to)	235-240
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	721
DOIs	https://doi.org/10.1557/proc-721-e5.8
State	Published - 2002
Event	Magnetic and Electronic Films - Microstructure, Texture and Application to Data Storage - San Francisco, United States Duration: 1 Apr 2002 → 4 Apr 2002

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title = "Enhanced magnetic transition of core-shell cobalt-platinum nanoalloys",

abstract = "Synthesis of 'Solid solution' and 'Core-shell' types of well defined Co-Pt based nanoalloys smaller than 10nm have been achieved by redox transmetalation reactions. This redox transmetalation are selectively observed only if the redox potential between two metals is favorable. The composition of the magnetic alloys can also be tuned by adjusting the ratio of reactants. Annealed core-shell nanoparticles transformed into mixed nanoalloys with face centered tetragonal (fct) structures, which show large coercivity and ferromagnetism at room temperature. These nanoparticles can potentially be used as an independent single magnetic bit of tera-bit information storage. Also, this kind of redox transmetalation reaction can be utilized as a general process to synthesize various types of nanoalloys with controlled composition in a selective fashion.",

author = "Park, {Jong Il} and Kang, {Nam Jung} and Lee, {Sang Min} and Sehun Kim and Oh, {S. J.} and Ri, {H. C.} and Jinwoo Cheon",

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T1 - Enhanced magnetic transition of core-shell cobalt-platinum nanoalloys

AU - Park, Jong Il

AU - Kang, Nam Jung

AU - Lee, Sang Min

AU - Kim, Sehun

AU - Oh, S. J.

AU - Ri, H. C.

AU - Cheon, Jinwoo

PY - 2002

Y1 - 2002

N2 - Synthesis of 'Solid solution' and 'Core-shell' types of well defined Co-Pt based nanoalloys smaller than 10nm have been achieved by redox transmetalation reactions. This redox transmetalation are selectively observed only if the redox potential between two metals is favorable. The composition of the magnetic alloys can also be tuned by adjusting the ratio of reactants. Annealed core-shell nanoparticles transformed into mixed nanoalloys with face centered tetragonal (fct) structures, which show large coercivity and ferromagnetism at room temperature. These nanoparticles can potentially be used as an independent single magnetic bit of tera-bit information storage. Also, this kind of redox transmetalation reaction can be utilized as a general process to synthesize various types of nanoalloys with controlled composition in a selective fashion.

AB - Synthesis of 'Solid solution' and 'Core-shell' types of well defined Co-Pt based nanoalloys smaller than 10nm have been achieved by redox transmetalation reactions. This redox transmetalation are selectively observed only if the redox potential between two metals is favorable. The composition of the magnetic alloys can also be tuned by adjusting the ratio of reactants. Annealed core-shell nanoparticles transformed into mixed nanoalloys with face centered tetragonal (fct) structures, which show large coercivity and ferromagnetism at room temperature. These nanoparticles can potentially be used as an independent single magnetic bit of tera-bit information storage. Also, this kind of redox transmetalation reaction can be utilized as a general process to synthesize various types of nanoalloys with controlled composition in a selective fashion.

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U2 - 10.1557/proc-721-e5.8

DO - 10.1557/proc-721-e5.8

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SN - 0272-9172

VL - 721

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EP - 240

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Magnetic and Electronic Films - Microstructure, Texture and Application to Data Storage

Y2 - 1 April 2002 through 4 April 2002

ER -

Enhanced magnetic transition of core-shell cobalt-platinum nanoalloys

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