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#### Group 63 Seminar on Magnetism, XLVII

(MIT Digital Computer Laboratory, 1953-04-07)

This memo is a summary of a Group 63 seminar on magnetism. Topics include the spinel structure of ferrites, basic crystal structures, and axes of symmetry.

#### Group 63 Seminar on Magnetism, XXXVIII

(MIT Digital Computer Laboratory, 1953-03-16)

This memo is a summary of a Group 63 seminar on magnetism. Topics include the phenomenon of superexchange, Hund's rule, the exchange effect, ferrites, and ferrimagnetism.

#### Group 63 Seminar on Magnetism, X

(MIT Digital Computer Laboratory, 1952-11-19)

This memo is a summary of a Group 63 seminar on magnetism. Topics include the harmonic oscillator, the case of boundary wall energy as a function of displacement, the motion of a body under friction, the resonance frequency ...

#### Group 63 Seminar on Magnetism V

(MIT Digital Computer Laboratory, 1952-10-28)

This memo is a summary of a Group 63 seminar on magnetism. Topics include Langevin's theory of paramagnetism and some general paramagnetic properties.

#### Group 63 Seminar on Magnetism, XXXVII

(MIT Digital Computer Laboratory, 1953-03-13)

This memo is a summary of a Group 63 seminar on magnetism. Topics include the electrical conductivity and ferromagnetism.

#### Group 63 Seminar on Magnetism, LI

(MIT Digital Computer Laboratory, 1953-05-06)

This memo is a summary of a Group 63 seminar on magnetism. Topics include the magnetic characteristics of ferrites in the neighborhood of the Curie temperature.

#### Group 63 Seminar on Magnetism VII

(MIT Digital Computer Laboratory, 1952-10-27)

This memo is a summary of a Group 63 seminar on magnetism. Topics include Weiss' notion of the internal field, magnetic domains, domain theory, domain growth, and domain rotation.

#### Group 63 Seminar on Magnetism, Appendix VII, Calculation of Spontaneous Magnetization in the Region of the Curie Temperature

(MIT Digital Computer Laboratory, 1953-05-06)

This memo is a summary of an appendix to a Group 63 seminar on magnetism. Topics include calculation of spontaneous magnetization in the region of the curie temperature and the Brillouin function.

#### A Free Energy Model For The Hysteresis Loop

(MIT Digital Computer Laboratory, 1953-06-16)

The free energy of magnetization is expressed as a fourth degree polynomial in the magnetization with a linear term due to an external field and quadratic and quartic terms due to Fermi, exchange, magnetostatic, etc., ...

#### Group 63 Seminar on Magnetism, XVII

(MIT Digital Computer Laboratory, 1952-12-11)

This memo is a summary of a Group 63 seminar on magnetism. Topics include the properties of metals, allowed energy levels, and the distribution of electrons over these levels.