ChemInform Abstract: Magnetic Ordering: Some Structural Aspects

Laughlin, David E.; Willard, M. A.; McHenry, Michael E.

doi:10.1002/chin.200046247

Cited by 5 publications

(8 citation statements)

References 10 publications

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“…Some people would say that even if the cubic lattice retains the symmetry of the crystal parameters (a＝b＝c), the total spatial symmetry of Fig. 1 The BCC crystal structure, including magnetic and symmetry information (9) . In the case of plutonium, the 12 bonds with the nearest neighbours widely vary with strength and can be separated into six pairs: blue (3.3), black (3.5 3.7), red (3.7 3.9), pink (3.9 4.1), green (4.5 4.7) and brown (4.7 5.3).…”

mentioning

confidence: 99%

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Massalski

2010

Materia Japan

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mentioning

confidence: 99%

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Massalski

2010

Materia Japan

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“…1 The BCC crystal structure, including magnetic and symmetry information. 9) of the BCT structure is demonstrated experimentally, even if it cannot be demonstrated by X-ray diffraction. Perhaps measurements of magnetostriction can accomplish this.…”

Section: Symmetry (Tetragonal)mentioning

confidence: 96%

“…Some people would say that even if the cubic lattice retains the symmetry of the crystal parameters (a ¼ b ¼ c), the total spatial symmetry of the structure is nevertheless lowered from Im " 3 3m to I 4 m m 0 , due to the aligned moments. Arguments of this kind have been used for several years now by Laughlin et al 9) and others [10][11][12][13][14][15] to discuss the symmetry of crystals that have magnetic moments associated with the atoms. So, the motif can change the lattice.…”

mentioning

confidence: 99%

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Massalski

2010

Mater. Trans.

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Several interesting features in the study of stabilities of phases, and in phase transformations, are discussed. It is proposed that symmetry considerations related to the presence of magnetism in iron suggests that the respective phases, BCC alpha and FCC gamma, have in fact lower symmetries than cubic. A proposal is made that the symbol beta used in the past for the designation of the paramagnetic BCC iron should perhaps be returned as a feature in phase diagrams. The importance of the new concept of a 'pseudogap' in the electronic band structure, as a stabilizing electronic feature, is discussed in the light of the Hume-Rothery electron concentration rule. It is proposed that since the thermal activation is a major feature in the behavior of isothermal martensites, a more suitable designation for these types of phase transformations might be ''thermally activated martensites'', or TAMs. Massive transformations are discussed briefly and it is emphasized that they present a specific example of an idiomorphic transformation process, not requiring the need for orientation relationships (ORs) between the parent and product phases.

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“…Furthermore, the magnetic groups should be shifted in space in the whole of the superfamilies. The relationship between magnetic structures and their magnetic groups were studied, for example, in [30], from which we illustrate a few examples. Some other examples are courtesy of D.B.…”

Section: The Magnetic Groupsmentioning

confidence: 99%

Crystallography and Magnetic Phenomena

Kopský¹

2015

Symmetry

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This essay describes the development of groups used for the specification of symmetries from ordinary and magnetic point groups to Fedorov and magnetic space groups, as well as other varieties of groups useful in the study of symmetric objects. In particular, we consider the problem of some incorrectness in Vol. A of the International Tables for Crystallography. Some results of tensor calculus are presented in connection with magnetoelectric phenomena, where we demonstrate the use of Ascher's trinities and Opechowski's magic relations and their connection. Specific tensor decomposition calculations on the grounds of Clebsch Gordan products are illustrated.

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ChemInform Abstract: Magnetic Ordering: Some Structural Aspects

Cited by 5 publications

References 10 publications

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Comments Concerning Some Features of Phase Diagrams and Phase Transformations

Crystallography and Magnetic Phenomena

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