Micromagnetics: past, present and future

The theory of micromagnetics started with great hopes of describing rigorously all magnetization process in ferromagnets. This goal has never been achieved, or even approached, for several reasons. Some of the reasons are misinterpretations and mistakes, introduced by those who misunderstood the whole theoretical approach. These mistakes must be removed and corrected. Others may be inherent to the physical limitations of the theory, but they can be removed by some modification and generalization of the basic assumptions. The ways to proceed, and the directions that micromagnetics should take in the future, are listed here, based on extrapolating from its history.

[1]  H. Braun Kramers's rate theory, broken symmetries, and magnetization reversal , 1994 .

[2]  H. Bertram,et al.  NONUNIFORM SWITCHING OF SINGLE DOMAIN PARTICLES AT FINITE TEMPERATURES , 1994 .

[3]  Ryan,et al.  Micromagnetics of domain walls at surfaces. , 1991, Physical review. B, Condensed matter.

[4]  H. Kronmüller,et al.  Spin Configuration and Intrinsic Coercive Field of Narrow Domain Walls in Co5R‐Compounds , 1972 .

[5]  William Fuller Brown,et al.  Virtues and Weaknesses of the Domain Concept , 1945 .

[6]  A. Aharoni,et al.  Nucleation of magnetisation reversal in iron whiskers , 1963 .

[7]  R. D. Blois Ferromagnetic Nucleation Sources on Iron Whiskers , 1961 .

[8]  A. Aharoni Theory of the DeBlois Experiment. I. The Effect of the Small Coil , 1968 .

[9]  J. Miltat,et al.  On corner singularities in micromagnetics , 1998 .

[10]  A. Aharoni Perfect and imperfect particles , 1986 .

[11]  Anthony Arrott,et al.  Introduction to the theory of ferromagnetism , 1996 .

[12]  J. Knowles Magnetic measurements on single acicular particles of γFe 2 O 3 , 1980 .

[13]  J. Knowles Magnetization reversal by flipping, in acicular particles of γ-Fe2O3 , 1986 .

[14]  D. R. Fredkin,et al.  A new finite element method in micromagnetics , 1993 .

[15]  P. L. Edwards,et al.  Effect of Tensile Stress on the Domain‐Nucleation Field of Iron Whiskers , 1972 .

[16]  A. Aharoni Theory of the DeBlois Experiment. III. Effect of Neighboring Imperfections , 1970 .

[17]  A. Aharoni,et al.  Magnetostatic energy calculations , 1991 .

[18]  F. Schuler Magnetic Films: Nucleation, Wall Motion, and Domain Morphology , 1962 .

[19]  W. Brown,et al.  Structure and Energy of One‐Dimensional Domain Walls in Ferromagnetic Thin Films , 1965 .

[20]  J. Knowles Comments to "Perfect and imperfect particles" by A. Aharoni , 1988 .

[21]  H. Hoffmann,et al.  Theory of magnetization ripple , 1968 .

[22]  A. Aharoni Periodic walls in very thin films , 1998 .

[23]  Aharoni,et al.  Magnetic domain walls in thick iron films. , 1991, Physical review. B, Condensed matter.

[24]  H. Bertram,et al.  Micromagnetics of long ferromagnetic particles , 1997 .

[25]  W. Brown Micromagnetics : Successor to domain theory ? , 1959 .

[26]  M. Schabes,et al.  Magnetostatic interaction fields for a three-dimensional array of ferromagnetic cubes , 1987 .

[27]  C. P. Bean,et al.  Nucleation of Ferromagnetic Domains in Iron Whiskers , 1959 .

[28]  A. Aharoni Theoretical Search for Domain Nucleation , 1962 .

[29]  J. W. Brown A critical assessment of Hoffmann's linear theory of ripple , 1970 .

[30]  K. Ramstöck,et al.  Corners and nucleation in Micromagnetics , 1998 .

[31]  M. Rekveldt,et al.  A domain size effect in the magnetic hysteresis of NiZn‐ferrites , 1996 .

[32]  William Fuller Brown,et al.  The Fundamental Theorem of Fine-Ferromagnetic-Particle Theory , 1968 .

[33]  A. Aharoni Comment on ‘‘Krammer’s rate theory, broken symmetries, and magnetization reversal’’ [J. Appl. Phys. 76, 6310 (1994)] , 1996 .

[34]  A. E. Labonte,et al.  Two‐Dimensional Bloch‐Type Domain Walls in Ferromagnetic Films , 1969 .

[35]  A. Aharoni Magnetostatic energy of the soliton in a cylinder , 1995 .

[36]  A. Aharoni,et al.  Applications of micromagnetics , 1971 .

[37]  E. Torre,et al.  On the computation of particle demagnetizing fields , 1989 .

[38]  A. Aharoni Critique on the numerical micromagnetics of nano-particles , 1999 .

[39]  T. Kusuda,et al.  Nucleation and demagnetization by needle pricking in MnBi films , 1974 .

[40]  Amikam Aharoni,et al.  Agreement Between Theory and Experiment , 1995 .

[41]  K. Fabian,et al.  Magnetic states of small cubic particles with uniaxial anisotropy , 1998 .

[42]  A. Hubert,et al.  Magnetic ground state of a thin-film element , 2000 .

[43]  J. Chapman,et al.  The initial permeability of polycrystalline MnZn ferrites: The influence of domain and microstructure , 1993 .

[44]  A. Aharoni Incoherent magnetization reversals in elongated particles , 1999 .