Magnetic properties of graphitically encapsulated nickel nanocrystals

J. H. Hwang, V. P. Dravid, M. H. Teng, J. J. Host, B. R. Elliott, D. L. Johnson, Thomas O Mason

Research output: Contribution to journalArticle

198 Citations (Scopus)

Abstract

Graphically encapsulated ferromagnetic Ni nanocrystals have been synthesized via a modified tungsten arc-discharge method. By virtue of the protective graphitic coating, these nanocrystals are stable against environmental degradation, including extended exposure to strong acids. The magnetic properties of the encapsulated particles are characterized with regard to the nanoscale nature of the particles and the influence of the graphitic coating which is believed to be benign insofar as the intrinsic magnetic properties of the encapsulated nanocrystals are concerned. The Curie temperature of graphitically encapsulated Ni nanocrystals is the same as that of microcrystalline Ni. However, saturation magnetization, remanent magnetization, and coercivity of these particles are reduced, for a range of temperatures. The unique features are compared with those of unencapsulated nanocrystalline and coarse microcrystalline nickel particles.

Original languageEnglish
Pages (from-to)1076-1082
Number of pages7
JournalJournal of Materials Research
Volume12
Issue number4
Publication statusPublished - Apr 1997

Fingerprint

Nickel
Nanocrystals
Magnetic properties
nanocrystals
nickel
magnetic properties
Coatings
magnetization
Tungsten
protective coatings
arc discharges
Saturation magnetization
Weathering
Curie temperature
Coercive force
coercivity
Magnetization
tungsten
degradation
saturation

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Hwang, J. H., Dravid, V. P., Teng, M. H., Host, J. J., Elliott, B. R., Johnson, D. L., & Mason, T. O. (1997). Magnetic properties of graphitically encapsulated nickel nanocrystals. Journal of Materials Research, 12(4), 1076-1082.

Magnetic properties of graphitically encapsulated nickel nanocrystals. / Hwang, J. H.; Dravid, V. P.; Teng, M. H.; Host, J. J.; Elliott, B. R.; Johnson, D. L.; Mason, Thomas O.

In: Journal of Materials Research, Vol. 12, No. 4, 04.1997, p. 1076-1082.

Research output: Contribution to journalArticle

Hwang, JH, Dravid, VP, Teng, MH, Host, JJ, Elliott, BR, Johnson, DL & Mason, TO 1997, 'Magnetic properties of graphitically encapsulated nickel nanocrystals', Journal of Materials Research, vol. 12, no. 4, pp. 1076-1082.
Hwang JH, Dravid VP, Teng MH, Host JJ, Elliott BR, Johnson DL et al. Magnetic properties of graphitically encapsulated nickel nanocrystals. Journal of Materials Research. 1997 Apr;12(4):1076-1082.
Hwang, J. H. ; Dravid, V. P. ; Teng, M. H. ; Host, J. J. ; Elliott, B. R. ; Johnson, D. L. ; Mason, Thomas O. / Magnetic properties of graphitically encapsulated nickel nanocrystals. In: Journal of Materials Research. 1997 ; Vol. 12, No. 4. pp. 1076-1082.
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