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Magnetomechanical and magnetoelectric effects, magnetostriction PACS 78.30.-j -Infrared and Raman spectra PACS 63.20.-e -Phonons in crystal lattices PACS 77.22.-d -Dielectric properties of solids and liquidsAbstract. -Infrared reflectivity and time-domain terahertz transmission spectra of EuTiO3 ceramics revealed a polar optic phonon at 6 -300 K whose softening is fully responsible for the recently observed quantum paraelectric behaviour. Even if our EuTiO3 ceramics show lower permittivity than the single crystal due to a reduced density and/or small amount of secondary pyrochlore Eu2Ti2O7 phase, we confirmed the magnetic field dependence of the permittivity, also slightly smaller than in single crystal. Attempt to reveal the soft phonon dependence at 1.8 K on the magnetic field up to 13 T remained below the accuracy of our infrared reflectivity experiment.

Bioactive composites, where the deleterious reactions between hydroxyapatite and the composite matrix (in this case zirconia) are kinetically inhibited by employing a super‐fast consolidation technique, spark plasma sintering (SPS), are reported. The composite materials (see Figure) are shown to be 5–7 times stronger and 4–7 times tougher than monolithic hydroxyapatite ceramics.

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