Enhancement in the coercivity in Nd2Fe14B/α-Fe nanocomposite alloys by Ti doping

Zhang, P. Y.; Hiergeist, Robert; Albrecht, Martin; Braun, Kai-Felix; Sievers, Sibylle; Lüdke, Joachim; Ge, H. L.

doi:https://doi.org/10.1063/1.3234399

Zugriffsnummer	31613
Dokumenttyp	Zeitschriftenartikel
Sprache	Englisch
Titel	Enhancement in the coercivity in Nd₂Fe₁₄B/α-Fe nanocomposite alloys by Ti doping
Autor(in); Institution	Zhang, P. Y.; Jiliang University, Magnetism Key Laboratory of Zhejiang Province, Hangzhou, CHINA Hiergeist, Robert; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig Albrecht, Martin; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig Braun, Kai-Felix; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig Sievers, Sibylle; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig Lüdke, Joachim; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig Ge, H. L.; Jiliang University, Magnetism Key Laboratory of Zhejiang Province, Hangzhou, CHINA
Quelle/Jahr	Journal of Applied Physics: 106 (2009), 7, 073904-1 - 073904-5
ISSN	0021-8979
DOI	https://doi.org/10.1063/1.3234399
URL	ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5286127&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5286127
Verlag	Melville, NY: AIP Publishing
Freie Schlagworte	alloying additions ; boron alloys ; coercive force ; doping ; ferromagnetic materials ; iron ; iron alloys ; magnetisation reversal ; nanocomposites ; neodymium alloys ; permanent magnets ; titanium alloys
Zusammenfassung	Nanocomposite α-Fe/Nd₂Fe₁₄B alloys with high coercivity were prepared by melt spinning. The influence of Ti addition on the microstructure and magnetic properties of these nanocomposite alloys were investigated. Ti addition has proved to result in relevant improvements in the microstructure and magnetic properties, especially in the coercivity H_c. It is shown that the magnetic properties of α-Fe/Nd₂Fe₁₄B nanocomposite are improved by an additional 5 at. % Ti, in particular, H_c from 595 up to 1006 kA/m, and (BH).Sub.max from 126.7 up to 135.3 kJ/m³. The coercivity mechanism of the α-Fe/Nd₂Fe₁₄B nanocompositemagnets was analyzed by studying the behavior of H_c(T)/M_s(T) versus H_N^min(T)/M_s(T) (Kronmüller plot) and the dependence of M_irrev(H)/2Mr on the reverse field H. The results of this analysis show that nucleation is the dominating mechanism for the magnetization reversal in these nanocomposites. The Kronmüller plot gives evidence for a reduction in the exchange coupling resulting in an increase in the coercivity.

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Zhang, P. Y., Hiergeist, R., Albrecht, M., Braun, K.-F., Sievers, S., Lüdke, J., & Ge, H. L. (2009). Enhancement in the coercivity in Nd₂Fe₁₄B/α-Fe nanocomposite alloys by Ti doping. Journal of Applied Physics, 106(7), 073904-1–073904-5. https://doi.org/10.1063/1.3234399

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