Numerical Analysis of Time Dependent Effects in Bulk Nanocrystalline Hard Magnets

Grzegorz Ziółkowski; Artur Chrobak; Nirina Randrianantoandro; Grażyna Chełkowska

doi:10.4028/www.scientific.net/SSP.194.62

Paper Titles

RNi₉In₂ (R= Pr, Nd, Eu) Compounds and their Hydrides
p.45

Influence of Ru on the Magnetic Properties of Y₂T₁₇ (T = Co, Fe)
p.50

Magnetic Properties of a HoFe₅Al₇ Single Crystal
p.54

Magnetic Properties of Tb₂Pd₂In; Single Crystal Study
p.58

Numerical Analysis of Time Dependent Effects in Bulk Nanocrystalline Hard Magnets
p.62

Thermodynamic Properties of RZnSn₂ (R = Y, Er, Lu) Compounds with HfCuSi₂ Structure Type
p.67

Neutron Diffraction Study of the Hexagonal Perovskite-Type Compound LaCrGe₃
p.71

Lattice and Magnetic Anisotropies in Uranium Intermetallic Compounds
p.75

Evolution of the Magnetic and Electrical Properties in the Ce-Co-Ge System
p.80

HomeSolid State PhenomenaSolid State Phenomena Vol. 194Numerical Analysis of Time Dependent Effects in...

Numerical Analysis of Time Dependent Effects in Bulk Nanocrystalline Hard Magnets

Abstract:

The presented work concerns numerical analysis of t-dependent magnetization curves. We propose the approach consisting in application of the so-called simulated annealing algorithm (SA) supplemented with local maximum entropy condition. Efficiency of the SA procedure and its parameters was tested with the use of computer generated curves derived from known distributions of relaxation time τ. Based on the determined SA parameters the analysis of empirical M(t) dependences measured for (Fe₈₀Nb₆B₁₄)_1-xTb_x (x=0.08, 0.16) bulk nanocrystalline alloys were also carried out. As it was shown the SA procedure allows determining distributions of relaxation time without preliminary assumption about its shape and number of components.

You might also be interested in these eBooks

Solid Compounds of Transition Elements II

View Preview

Info:

Periodical:

Solid State Phenomena (Volume 194)

Pages:

62-66

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.194.62

Citation:

Cite this paper

Online since:

November 2012

Authors:

Grzegorz Ziółkowski, Artur Chrobak, Nirina Randrianantoandro, Grażyna Chełkowska

Keywords:

Bulk Nanocrystalline Alloy, Hard Magnets, Relaxation Time, Simulated Annealing (SA)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] M. E. McHenry, M. A. Willard, D. E. Laughlin, Prog. in Mat. Sci. 44 (1999) 291.

Google Scholar

[2] A. Inoue, Mater. Sci. and Eng. A 226-228 (1997) 357-363.

Google Scholar

[3] H. Chiriac, N. Lupu, Journal of Non-Crystalline Solids 250-252 (1999) 751-756.

DOI: 10.1016/s0022-3093(99)00173-8

Google Scholar

[4] A.Chrobak, G.Haneczok, G. Chełkowska, A. Kassiba, G. Ziółkowski, Phys. Stat. Sol.(a) 208, No. 11 (2011) 2692–2698.

DOI: 10.1002/pssa.201127016

Google Scholar

[5] A.Chrobak, M.Karolus, G.Haneczok, Solid State Phenomena 163 (2010) 233-238.

DOI: 10.4028/www.scientific.net/ssp.163.233

Google Scholar

[6] G.Ziółkowski, N.Randrianantoandro, A.Chrobak, J.Klimontko, M.Kądziołka-Gaweł, G.Haneczok, Acta Physica Polonica A, Vol. 121, No. 5-6, (2012) 1266-1269.

DOI: 10.12693/aphyspola.121.1266

Google Scholar

[7] A. Lazinica, Particle Swarm Optymization, In-Tech, Croatia, 2009, DOI: 10.5772/109 (http://www.intechopen.com/books/particle_swarm_optimization).

Google Scholar