The Investigation of the Magnetization Reversal Mechanism in the Nd-Fe-B Type Magnet, Aligned by Hot Deformation

• Authors: M. Dośpiał , M. Nabiałek , M. Szota , W. Lipiec , V. Nizhankovskii , A. Ceglarek , P. Pietrusiewicz
• Languages of publication: EN

Abstracts

EN

The magnetization reversal mechanism in the Nd_{16}Fe_{78}B_6 hot densified magnet, aligned by means of die-upset forging has been investigated. The magnetic parameters have been derived from major hysteresis loop. The magnetocrystalline anisotropy constants K_1 and K_2 using Sucksmith-Thompson relation modified by Ram and Gaunt have been calculated from the high field measurements up to 5 T. These data have been used to determine the theoretical value of coercivity as a function of the angle Ψ_0 between the sample easy axis and the applied magnetic field direction. The experimental value of coercivity as a function of Ψ_0 has been determined from the demagnetization curves measured for different Ψ_0 angles. It was found that the best correlation between theoretical and experimental data have been achieved for magnetization reversal mechanism controlled partially by pinning of domain walls on grain boundaries and nucleation processes.

Keywords

EN

75.30.Gw; 75.30.Kz; 75.50.Vv; 75.50.Ww; 75.60.Jk

Discipline

• 75.30.Gw: Magnetic anisotropy
• 75.60.Jk: Magnetization reversal mechanisms
• 75.50.Vv: High coercivity materials
• 75.50.Ww: Permanent magnets(for magnets, see 07.55.Db in instruments)
• 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 5-6
• Pages: 1282-1284

Dates

published

2012-05

Contributors

author

M. Dośpiał

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

M. Nabiałek

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

M. Szota

• Institute of Materials Science, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

W. Lipiec

• Electrotechnical Institute, M. Skłodowskiej-Curie 55/61, 50-369 Wrocław, Poland

author

V. Nizhankovskii

• International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-421 Wrocław, Poland

author

A. Ceglarek

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

author

P. Pietrusiewicz

• Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

References

• 1. W. Lipiec, H.A. Davies, J. Alloys Comp. 491, 694 (2010)
• 2. Y.B. Kim, H.T. Kim, S.H. Cho, G.A. Kapustin, Mater. Sci. 21, 141 (2003)
• 3. R.W. Lee, Appl. Phys. Lett. 46, 790 (1985)
• 4. C.D. Fuerst, E.G. Brewer, J. Appl. Phys. 73, 5751 (1993)
• 5. C.D. Fuerst, E.G. Brewer, J. Appl. Phys. 70, 6444 (1991)
• 6. D. Derewnicka-Krawczynska, Ph.D. thesis, Warsaw 2006 (in Polish)
• 7. D. Plusa, M. Dospial, D. Derewnicka-Krawczyńska, P. Wieczorek, U. Kolarczyk, Arch. Met. Mater. 56, 159 (2011)
• 8. V.I. Nizhankovskii, L.B. Lugansky, Meas. Sci. Technol. 18, 1533 (2007)
• 9. W. Sucksmith, J.E. Thompson, Proc. R. Soc. Lond. Ser. A 225, 362 (1954)
• 10. U. Ram, P. Grunt, J. Appl. Phys. 54, 2872 (1983)
• 11. K.-D. Durst, H. Kronmüller, W. Ervens, Phys. Status Solidi A 108, 403 (1988)

Identifiers

DOI

10.12693/APhysPolA.121.1282