## Electrodynamics of Continuous Media |

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Page 150

If the constant 8 is positive, the anisotropy energy is least when the

is in the z-direction, and the z-axis is said to be the direction of easy

-plane, ...

If the constant 8 is positive, the anisotropy energy is least when the

**magnetisation**is in the z-direction, and the z-axis is said to be the direction of easy

**magnetisation**. If, however, 8 ~ 0, the direction of easy**magnetisation**lies in the xy-plane, ...

Page 152

(37.7) T If H > 8M, so has only one minimum, at 0 = $t, i.e. the

parallel to the field. If, however, H & 8M, then ô has a minimum when Mz = Msin 6

= H/8, (37.8) to which there correspond two possible positions of the vector M (at

...

(37.7) T If H > 8M, so has only one minimum, at 0 = $t, i.e. the

**magnetisation**isparallel to the field. If, however, H & 8M, then ô has a minimum when Mz = Msin 6

= H/8, (37.8) to which there correspond two possible positions of the vector M (at

...

Page 154

M.(M.'-'. M. M. H.M.). Rhombohedral symmetry admits this sixth-order term and

also one independent quartic combination, for example 4M.[(M.--iM)*--(Mr-iMy)*]

= Mr.M.(M.”—3M,”). The determination of the direction of easy

the ...

M.(M.'-'. M. M. H.M.). Rhombohedral symmetry admits this sixth-order term and

also one independent quartic combination, for example 4M.[(M.--iM)*--(Mr-iMy)*]

= Mr.M.(M.”—3M,”). The determination of the direction of easy

**magnetisation**inthe ...

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### Contents

Methods of solving problems in electrostatics | 9 |

A conducting ellipsoid | 20 |

The forces on a conductor | 31 |

Copyright | |

54 other sections not shown

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### Common terms and phrases

angle anisotropy atoms averaging axes axis body boundary condition calculated charge circuit co-ordinates coefficient components conducting conductor constant corresponding cross-section crystal Curie point curl H current density cylinder denote depends derivative determined dielectric permeability difference differentiating diffraction dipole direction discontinuity distance effect electric field electromagnetic electrons electrostatic ellipsoid entropy equation div expression external field ferroelectric ferromagnetic fluid flux force formula free energy frequency function given gives grad Hence induction integral isotropic Laplace's equation layer Let us consider linear macroscopic magnetic field magnetic moment magnetisation magnitude Maxwell's equations medium metal normal obtain optical particle perpendicular phase piezoelectric plane polarisation PROBLEM propagation properties pyroelectric quantities radius refraction relation respect result rotation scalar scattering self-inductance ſº solution sphere suffixes superconducting surface symmetry tangential temperature theory thermodynamic potential tion uniform unit volume values variable velocity wave vector wire z-axis zero