Symmetry of magnetically ordered three-dimensional octagonal quasicrystals
نویسندگان
چکیده
منابع مشابه
Symmetry of Magnetically Ordered Three Dimensional Octagonal Quasicrystals
The theory of magnetic symmetry in quasicrystals, described in a companion paper [Acta Crystallographica AXX (2003) xxx-xxx], is used to enumerate all 3-dimensional octagonal spin point groups and spin space-group types, and calculate the resulting selection rules for neutron diffraction experiments. 1. Introduction We enumerate here all three-dimensional octagonal spin groups and calculate the...
متن کاملSymmetry of magnetically ordered three-dimensional octagonal quasicrystals.
The theory of magnetic symmetry in quasicrystals, described in a companion paper [Lifshitz & Even-Dar Mandel (2004). Acta Cryst. A60, 167-178], is used to enumerate all three-dimensional octagonal spin point groups and spin-space-group types and calculate the resulting selection rules for neutron diffraction experiments.
متن کاملSymmetry of Magnetically Ordered Quasicrystals
The notion of magnetic symmetry is reexamined in light of the recent observation of long-range magnetic order in icosahedral quasicrystals [Charrier et al., Phys. Rev. Lett. 78, 4637 (1997)]. The relation between the symmetry of a magnetically ordered (periodic or quasiperiodic) crystal, given in terms of a “spin space group,” and its neutron diffraction diagram is established. In doing so, an ...
متن کاملMagnetically ordered quasicrystals: enumeration of spin groups and calculation of magnetic selection rules.
Details are given of the theory of magnetic symmetry in quasicrystals, which has previously only been outlined. A practical formalism is developed for the enumeration of spin point groups and spin space groups, and for the calculation of selection rules for neutron scattering experiments. The formalism is demonstrated using the simple, yet non-trivial, example of magnetically ordered octagonal ...
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The possibility of a physical rotational symmetry for a quasicrystal is discussed and the minimal tensorial rank which is necessary to detect such a symmetry is shown to be simply related to the order of a symmetry rotation. For icosahedral symmetry, in particular, the minimal rank is 5 which means that "ordinary" linear (i.e. first order) behaviour (in the termal, electromagnetic, déformation ...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 2004
ISSN: 0108-7673
DOI: 10.1107/s0108767304002272