The influence of particle size and interactions on the magnetization and susceptibility of nanometre-size particles
作者： M Hanson , C Johansson , M S Pedersen , S Morup
DOI: 10.1088/0953-8984/7/48/016
关键词: Anisotropy 、 Nanometre 、 Superparamagnetism 、 Nuclear magnetic resonance 、 Magnetic susceptibility 、 Amorphous solid 、 Magnetization 、 Chemical physics 、 Saturation (magnetic) 、 Particle size 、 Chemistry
摘要: We studied the magnetic properties of frozen liquids containing amorphous Fe1-xCx particles. By varying particle size and concentration, we could separate single effects from interactions. In samples particles with median diameters 5.0 nm 3.8 spontaneous saturation magnetizations 7.1 kA m-1 9.2 m-1, interactions are observed. For 3.2 no were negligible superparamagnetic blocking temperature increases size. The effective anisotropy constant decreasing size, implying that is enhanced by surface effects.
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sci-hub.se 参考文章(25)
C. Johansson, M. Hanson, P.V. Hendriksen, S. Mørup, The magnetization of magnetic liquids containing amorphous Fe1-xCx particles Journal of Magnetism and Magnetic Materials. ,vol. 122, pp. 125- 128 ,(1993) , 10.1016/0304-8853(93)91055-C
C. Johansson, M. Hanson, M.S. Pedersen, S. Mørup, High field magnetization of magnetic liquids containing amorphous iron carbon particles Journal of Magnetism and Magnetic Materials. ,vol. 134, pp. 25- 28 ,(1994) , 10.1016/0304-8853(94)90067-1
Nabil Y. Ayoub, The Effect of Dipolar Interactions on the Susceptibility Peaks in a Solidified Ferrofluid Japanese Journal of Applied Physics. ,vol. 30, pp. 3381- 3385 ,(1991) , 10.1143/JJAP.30.3381
S Mørup, Superparamagnetism and Spin Glass Ordering in Magnetic Nanocomposites EPL. ,vol. 28, pp. 671- 676 ,(1994) , 10.1209/0295-5075/28/9/010
Jacques Van Wonterghem, Steen Mørup, Stuart W Charles, Stephen Wells, An investigation of the chemical reactions leading to the formation of ultrafine amorphous fe100−xcx alloy particles Journal of Colloid and Interface Science. ,vol. 121, pp. 558- 563 ,(1988) , 10.1016/0021-9797(88)90457-2
S. Mørup, C.A. Oxborrow, P.V. Hendriksen, M.S. Pedersen, M. Hanson, C. Johansson, Magnetic and mechanical coupling between ultrafine maghemite particles Journal of Magnetism and Magnetic Materials. ,vol. 140, pp. 409- 410 ,(1995) , 10.1016/0304-8853(94)00963-5
A.T. Cayless, S.R. Hoon, B.K. Tanner, R.W. Chantrell, M. Kilner, High sensitivity measurements of néel relaxation in fine particle ferromagnetic systems Journal of Magnetism and Magnetic Materials. ,vol. 30, pp. 303- 311 ,(1983) , 10.1016/0304-8853(83)90068-9
A. Tari, J. Popplewell, S. W. Charles, D. St. P. Bunbury, K. M. B. Alves, Mössbauer effect and magnetism of single domain Fe3O4 particles in ferrofluids Journal of Applied Physics. ,vol. 54, pp. 3351- 3358 ,(1983) , 10.1063/1.332448
P.V. Hendriksen, C.A. Oxborrow, S. Linderoth, S. Mørup, M. Hanson, C. Johansson, F. Bødker, K. Davies, S.W. Charles, S. Wells, Particle interaction effects in systems of ultrafine iron oxide particles Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms. ,vol. 76, pp. 138- 139 ,(1993) , 10.1016/0168-583X(93)95159-3
J. I. Gittleman, B. Abeles, S. Bozowski, Superparamagnetism and relaxation effects in granular Ni-SiO2and Ni-Al2O3films Physical Review B. ,vol. 9, pp. 3891- 3897 ,(1974) , 10.1103/PHYSREVB.9.3891