Structural and Magnetic Phase Transitions in Minerals |
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Page 164
... anisotropy ) or 2 ( the xy model , approximated by strong planar anisotropy ) . In some cases , such as d = 1 , there can be no phase transition at all . The numbers ( n , d ) define a universality class , with common critical behavior ...
... anisotropy ) or 2 ( the xy model , approximated by strong planar anisotropy ) . In some cases , such as d = 1 , there can be no phase transition at all . The numbers ( n , d ) define a universality class , with common critical behavior ...
Page 200
... anisotropy in M1 explains the canting . As for the a direction chosen by the G modes in Mn2SiO4 , our computations have shown that it is not due to the dipolar interactions between the magnetic moments , which would favor the b axis ...
... anisotropy in M1 explains the canting . As for the a direction chosen by the G modes in Mn2SiO4 , our computations have shown that it is not due to the dipolar interactions between the magnetic moments , which would favor the b axis ...
Page 204
... anisotropy of the Mn2 + ions , for x = 0.29 , a = c . For this composition the Fe2 + ions occupy the M1 site more than the M2 site , and the easy axis of the moments on M1 is expected to govern the overall anisotropy . Therefore , this ...
... anisotropy of the Mn2 + ions , for x = 0.29 , a = c . For this composition the Fe2 + ions occupy the M1 site more than the M2 site , and the easy axis of the moments on M1 is expected to govern the overall anisotropy . Therefore , this ...
Contents
Incommensurate Phase Transitions in Quartz and Berlinite | 17 |
Phase Separation in Quadrilateral Pyroxenes and Olivines | 39 |
Multicritical Phase Relations in Minerals | 60 |
Copyright | |
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Structural and Magnetic Phase Transitions in Minerals S. Ghose,J.M.D. Coey,E. Salje Limited preview - 2012 |
Structural and Magnetic Phase Transitions in Minerals S. Ghose,J.M.D. Coey,E. Salje Snippet view - 1988 |
Structural and Magnetic Phase Transitions in Minerals S. Ghose,J.M.D. Coey,E. Salje Snippet view - 1988 |
Common terms and phrases
a-ẞ transition anisotropy ANNNI model antiferromagnetic approximation atoms axis Bachheimer Ballet behavior berlinite Bukowinski calculated canting Chem chemical Co₂SiO4 Coey components composition coupling crystal field crystal structure crystallographic Davidson decreases density Di-En disordered Dolino Earth Planet electron equilibrium experimental Fe² Fe2+ Fe2SiO4 Fe³ feldspar ferromagnetic free energy Geophys Ghose grunerite high pressure high-spin ilvaite inc phase incommensurate phase interactions ions Jeanloz Landau theory lattice layers Lindsley low temperatures lower mantle LS transition M2 sites magnetic order magnetic phase transitions magnetic properties magnetic structure Matsui measurements MgSiO3 Mineral Mn2SiO4 mode Mössbauer neutron diffraction observed octahedral olivines order parameter orthopyroxene orthorhombic pairs perovskite phase diagrams phase transition Phys polytypes polytypic phases predicted pyroxenes quartz Salje sample shown in Fig silicates SiO2 solid solution space group spin glass ẞ phase susceptibility symmetry temperature dependence thermal expansion thermodynamic tion transformation X-ray zero pressure