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Structural and magnetic properties of heat-treated ultrafine single crystalline Nd2Fe14B particles obtained by ball-milling of dynamic hydrogenation disproportionation desorption and recombination powder

Pal, S. K. and Schultz, L. and Gutfleisch, O. (2014):
Structural and magnetic properties of heat-treated ultrafine single crystalline Nd2Fe14B particles obtained by ball-milling of dynamic hydrogenation disproportionation desorption and recombination powder.
In: Scripta Materialia, PERGAMON-ELSEVIER SCIENCE LTD, pp. 33-36, 78-79, ISSN 13596462,
[Online-Edition: http://dx.doi.org/10.1016/j.scriptamat.2014.01.024],
[Article]

Abstract

Isolated single crystalline Nd2Fe14B particles (200-500 nm) prepared by wet/surfactant-assisted ball milling were heat-treated at different temperatures under high vacuum, and structural and magnetic properties were investigated. Maximum coercivity values of 0.73 and 0.70 T were obtained after 400 degrees C heat-treatment for oleic acid and ethanol milled samples, respectively. With a further increase in the heat-treatment temperature the coercivity decreases. An increase in alpha-Fe and Nd2O3 phases and a sharp change of lattice parameter - c were observed when heat-treating above 400 degrees C.

Item Type: Article
Erschienen: 2014
Creators: Pal, S. K. and Schultz, L. and Gutfleisch, O.
Title: Structural and magnetic properties of heat-treated ultrafine single crystalline Nd2Fe14B particles obtained by ball-milling of dynamic hydrogenation disproportionation desorption and recombination powder
Language: English
Abstract:

Isolated single crystalline Nd2Fe14B particles (200-500 nm) prepared by wet/surfactant-assisted ball milling were heat-treated at different temperatures under high vacuum, and structural and magnetic properties were investigated. Maximum coercivity values of 0.73 and 0.70 T were obtained after 400 degrees C heat-treatment for oleic acid and ethanol milled samples, respectively. With a further increase in the heat-treatment temperature the coercivity decreases. An increase in alpha-Fe and Nd2O3 phases and a sharp change of lattice parameter - c were observed when heat-treating above 400 degrees C.

Journal or Publication Title: Scripta Materialia
Volume: 78-79
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Uncontrolled Keywords: Magnetism, Nd2Fe14B, Coercivity, Surfactant-assisted ball-milling, Heat treatment
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Functional Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 03 Mar 2015 12:03
Official URL: http://dx.doi.org/10.1016/j.scriptamat.2014.01.024
Identification Number: doi:10.1016/j.scriptamat.2014.01.024
Funders: This research was performed with the support of the Siemens/DAAD Post Graduate Program through scholarship.
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