Structural and Magnetic Phase Transitions in Minerals |
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Page 188
... decreases in a manner similar to the Brillouin functions . But while in Co2SiO4 the moment on M1 decreases like that on M2 , in Mn2SiO4 and Fe2- SiO4 it falls off very quickly when the temperature increases above 0 K. The direc- tion of ...
... decreases in a manner similar to the Brillouin functions . But while in Co2SiO4 the moment on M1 decreases like that on M2 , in Mn2SiO4 and Fe2- SiO4 it falls off very quickly when the temperature increases above 0 K. The direc- tion of ...
Page 200
... decreases , and decreases smoothly . The case of M Co is illustrated in Fig . 12c . This corres- ponds to Abb > Acc , with Ac such that the easy axis lies about 16 ° away from b . The difference Abb - Acc being high , the slope of the ...
... decreases , and decreases smoothly . The case of M Co is illustrated in Fig . 12c . This corres- ponds to Abb > Acc , with Ac such that the easy axis lies about 16 ° away from b . The difference Abb - Acc being high , the slope of the ...
Page 201
... decrease , when the temperature decreases below 14 K , can be correlated with the decrease in the a component of the spins on M1 due to the increasing cant- ing . Modes Fi and G are related through Ac " , while F and G are related ...
... decrease , when the temperature decreases below 14 K , can be correlated with the decrease in the a component of the spins on M1 due to the increasing cant- ing . Modes Fi and G are related through Ac " , while F and G are related ...
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