Effect of Milling on the Intrinsic Coercivity of Barium Ferrite Powders
作者： KOICHI HANEDA , HIROSHI KOJIMA
DOI: 10.1111/J.1151-2916.1974.TB10816.X
关键词: Coercivity 、 Nuclear magnetic resonance 、 Absorption spectroscopy 、 Condensed matter physics 、 Materials science 、 Superparamagnetism 、 Ferrite (magnet) 、 Nucleation 、 Barium ferrite 、 Thermal fluctuations 、 Anisotropy
摘要: The effect of milling on the intrinsic coercive force Ba ferrite powders has been ascribed to (1) thermal fluctuations caused by superparamagnetic fine particles and (2) lattice defects introduced milling. To test these interpretations, Moessbauer absorption spectra angular variation for ball-milled were determined. With increasing time, spectrum becomes ambiguous, lines are broadened; quadrupole-split center line corresponding BaFe12O19 cannot be detected. shows that considerably lowers either nucleation field reverse domain or effective anisotropy both. It is concluded defects, rather than milling, greatly affect powders.
sci-hub.se 参考文章(10)
Amikam Aharoni, Theoretical Search for Domain Nucleation Reviews of Modern Physics. ,vol. 34, pp. 227- 238 ,(1962) , 10.1103/REVMODPHYS.34.227
R. K. Tenzer, Influence of Particle Size on the Coercive Force of Barium Ferrite Powders Journal of Applied Physics. ,vol. 34, pp. 1267- 1268 ,(1963) , 10.1063/1.1729465
G. W. Rathenau, Saturation and Magnetization of Hexagonal Iron Oxide Compounds Reviews of Modern Physics. ,vol. 25, pp. 297- 301 ,(1953) , 10.1103/REVMODPHYS.25.297
D. Ratnam, W. Buessem, On the nature of defects in barium ferrite platelets IEEE Transactions on Magnetics. ,vol. 6, pp. 610- 614 ,(1970) , 10.1109/TMAG.1970.1066877
C. D. Mee, J. C. Jeschke, Single‐Domain Properties in Hexagonal Ferrites Journal of Applied Physics. ,vol. 34, pp. 1271- 1272 ,(1963) , 10.1063/1.1729467
Rudolf K. Tenzer, Influence of Static Pressure on the Coercive Force of Barium Ferrite Powder Journal of Applied Physics. ,vol. 36, pp. 1180- 1181 ,(1965) , 10.1063/1.1714159
Walter Kündig, Hans Bömmel, G. Constabaris, R. H. Lindquist, Some Properties of Supported Small α − Fe 2 O 3 Particles Determined with the Mössbauer Effect Physical Review. ,vol. 142, pp. 327- 333 ,(1966) , 10.1103/PHYSREV.142.327
D. V. Ratnam, W. R. Buessem, Angular Variation of Coercive Force in Barium Ferrite Journal of Applied Physics. ,vol. 43, pp. 1291- 1293 ,(1972) , 10.1063/1.1661260
A Mechanism of Magnetic Hysteresis in Heterogeneous Alloys Philosophical transactions - Royal Society. Mathematical, physical and engineering sciences. ,vol. 240, pp. 599- 642 ,(1948) , 10.1098/RSTA.1948.0007
H. Richter, H. Dietrich, On the magnetic properties of fine-milled barium and strontium ferrite IEEE Transactions on Magnetics. ,vol. 4, pp. 263- 267 ,(1968) , 10.1109/TMAG.1968.1066284