Gamma Irradiation Effects on the Magnetic Properties of Hard Ferrites
Many industrial materials like magnets need to be
tested for the radiation environment expected at linear colliders (LC)
where the accelerator and detectors will be subjected to large
influences of beta, neutron and gamma’s over their life Gamma
irradiation of the permanent sample magnets using a 60Co source was
investigated up to an absorbed dose of 700Mrad shows a negligible
effect on some magnetic properties of Nd-Fe-B. In this work it has
been tried to investigate the change of some important properties of
Barium hexa ferrite. Results showed little decreases of magnetic
properties at doses rang of 0.5 to 2.5 Mrad. But at the gamma
irradiation dose up to 10 Mrad it is showed a few increase of
properties. Also study of gamma irradiation of Nd-Fe-B showed
considerably increase of magnetic properties.
[1] R. D. Brown, and J. R. Cost, “Radiation –Induced Changes in Magnetic
Properties of Nd-Fe-B Permanent Magnets”, IEEE Transl., J. Magn.,
vol.25, 1989, 3117.
[2] S. Okuda, K. Ohashi, and N. Kobayashi, “Effects of electron-beam and
gamma Irradiation on the Flux of Nd-Fe-B and Sm-Co Permanent
Magnets”, Nucl. Instr. And Meth., B94, 1994, 227
[3] A. I. Schindler, “The Effects of Irradiation on Magnetic Properties of
Alloys and Ferrites”, U. S. Naval Research Laboratory, Report 568,
Washinton, 1961.
[4] H. B. Luna, X. K. Maruyama, N. J. Colella, S. J. Hobbs , R. S. Hornady,
B. Kulke, and J. V. Pallomar, “Bremsstrahlung Radiation Effects in Rare
Earth Permanent Magnets”, Nucl. Instr. And Meth., A285, 1989, pp.349-
354.
[5] K. Boockman, M. Liehr,W. Rodewald, E. Salzborn, M. Schlapp, and B.
Wall, ‘’Effects of gamma Irradiation on Sm-Co and Nd-Dy-Fe-B
Magnets”, Journal of Magnetism and Magnetic materials, 101, 1991,
pp.345–346.
[6] H. Pscard, and F. Studer, “Review of Irradiation on Ferrites: Results in
the world from 1970 to 1995”, J. Phys. IV Franc 7, C1-211, 1997.
[7] B. Salehpour, PhD Thesis, University of Birmingham, (1981).
[1] R. D. Brown, and J. R. Cost, “Radiation –Induced Changes in Magnetic
Properties of Nd-Fe-B Permanent Magnets”, IEEE Transl., J. Magn.,
vol.25, 1989, 3117.
[2] S. Okuda, K. Ohashi, and N. Kobayashi, “Effects of electron-beam and
gamma Irradiation on the Flux of Nd-Fe-B and Sm-Co Permanent
Magnets”, Nucl. Instr. And Meth., B94, 1994, 227
[3] A. I. Schindler, “The Effects of Irradiation on Magnetic Properties of
Alloys and Ferrites”, U. S. Naval Research Laboratory, Report 568,
Washinton, 1961.
[4] H. B. Luna, X. K. Maruyama, N. J. Colella, S. J. Hobbs , R. S. Hornady,
B. Kulke, and J. V. Pallomar, “Bremsstrahlung Radiation Effects in Rare
Earth Permanent Magnets”, Nucl. Instr. And Meth., A285, 1989, pp.349-
354.
[5] K. Boockman, M. Liehr,W. Rodewald, E. Salzborn, M. Schlapp, and B.
Wall, ‘’Effects of gamma Irradiation on Sm-Co and Nd-Dy-Fe-B
Magnets”, Journal of Magnetism and Magnetic materials, 101, 1991,
pp.345–346.
[6] H. Pscard, and F. Studer, “Review of Irradiation on Ferrites: Results in
the world from 1970 to 1995”, J. Phys. IV Franc 7, C1-211, 1997.
[7] B. Salehpour, PhD Thesis, University of Birmingham, (1981).
@article{"International Journal of Earth, Energy and Environmental Sciences:70026", author = "F. Abbas Pour Khotbehsara and B. Salehpour and A. Kianvash", title = "Gamma Irradiation Effects on the Magnetic Properties of Hard Ferrites", abstract = "Many industrial materials like magnets need to be
tested for the radiation environment expected at linear colliders (LC)
where the accelerator and detectors will be subjected to large
influences of beta, neutron and gamma’s over their life Gamma
irradiation of the permanent sample magnets using a 60Co source was
investigated up to an absorbed dose of 700Mrad shows a negligible
effect on some magnetic properties of Nd-Fe-B. In this work it has
been tried to investigate the change of some important properties of
Barium hexa ferrite. Results showed little decreases of magnetic
properties at doses rang of 0.5 to 2.5 Mrad. But at the gamma
irradiation dose up to 10 Mrad it is showed a few increase of
properties. Also study of gamma irradiation of Nd-Fe-B showed
considerably increase of magnetic properties.", keywords = "Gamma ray irradiation, Hard Ferrite, Magnetic
coefficient, Radiation dose.", volume = "9", number = "7", pages = "773-4", }