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南方科技大学公共卫生及应急管理学院2026级博士研究生招生报考通知（长期有效）

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[资源] Book Symmetry and Magnetism 1963

P__ACÆ
All scientists use symmetry arguments in one form or another,
often without feeling any pressing need to formalize them. A
useful measure of simpli_cation can often be achieved merely by
recognizing that two aspects are identical, that a situation looks
exactly the same when viewed from two di_erent directions. How-
ever, in dealing with crystals - and the majority of solids are
crystalline - it is important to formulate the physical properties
of crystals in a systematic tensor notation, if the maximum
amo__nt ofsimpli_cation is to be obtained by the use of symmetry
argu_ents.
The purpose of this book is to explain how the symmetry of
magnetic and non-magnetic crystals is speci_ed and how such
speci_cations can be used to simplify the forms of tensors charac-
terizing the (steady-state) macroscopic physical properties of
crystals: the book is not concerned with the explanation of these
properties in ter_s of microscopic structure. The application of
symmetry arguments to non-magnetic crystals is, of course, not
new (there is an excellent account in J. F. Yye's textbook 'Physical
Properties of Crystals') but the e_phasis in the present work is on
magnetic properties and magnetic crystals, and much of the
material presented here derives from recent work - mainly in the
U.S.S.R. - on magnetic symmetry groups.
Throughout the book, the term 'magnetic crystals' is under-
stood to mean crystals that exhibit ordered arrays of (spin) mag-
netic moments. It therefore includes, as an important class, anti-
ferromagnetic crystals, as well as the more obviously 1_agnetic
materials such as the ferromagnetic metals iron and nickel or the
ferrimagnetic ferrites and garnets.

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