Magnetization jumps (MJs) and the exchange bias (EB) effect are simultaneously observed in the mixed-spin oxide (FeTiO3)0.9-(Fe2O3)0.1 at 2.0 K. Dc and ac susceptibility measurements confirm a reentrant spin glass phase with a partially disordered antiferromagnetic (PDA) state below the irreversibility temperature (Tir1⁄4 60 K). Antiferromagnetic (AFM) Fe3þ clusters are nested in AFM Fe2þ latti...

Heterostructured photocatalysts comprised of microcrystalline (mc-) cores and nanostructured (ns-) shells were prepared by the sol-gel method. The ability of titania-coated ATiO3 (A = Fe, Pb) and AFeO3 (A = Bi, La, Y) catalysts to degrade methylene blue in visible light (λ > 420 nm) was compared. The catalysts with the titanate cores had enhanced photocatalytic activities for methylene blue deg...

Singleand reflected-shock compression measurements on single-crystal i menite (FeTiO3) to pressures of 635 and 930 kbar, respectively, demonstrate anomalously large compressions above 4320 kbar and imply the onset of one or more major phase changes at this pressure level which continue to occur to at least 4600 kbar. The phase change onset pressure is considerably above the calculated upper bou...

Oxygen fugacity has been calculated for rutile–ilmenite assemblages from the reaction 2Fe2O3 (in ilmenite) C 4TiO2 (rutile) D 4FeTiO3 (in ilmenite) C O2. The equation log f O2 D 22:59 25925=T 3:09 log T C 0:0016535P C 48:836P=T 4 log a FeTiO3 C 2 log a Fe2O3 C 4 log a TiO2 , where T is in kelvin and P is in kbar, was derived from available thermodynamic data. The hypothetical end-member rutile–...

The performance of complex oxide heterostructures depends primarily on the interfacial coupling of the two component structures. This interface character inherently varies with the synthesis method and conditions used since even small composition variations can alter the electronic, ferroelectric, or magnetic functional properties of the system. The focus of this article is placed on the interf...

We present in situ measurements of the unit-cell volume of a natural terrestrial ilmenite (Jagersfontein mine, South Africa) and a synthetic reduced ilmenite (FeTiO3) at simultaneous high pressure and high temperature up to 16 GPa and 1273 K. Unit-cell volumes were determined using energy-dispersive synchrotron X-ray diffraction in a multi-anvil press. Mössbauer analyses show that the synthetic...

The phase evolution mechanism and purification of titanium oxycarbide (TiCxOy) synthesized via the carbothermal reduction ilmenite are investigated. reaction process products performed analyzed by means X-ray diffraction (XRD), scanning electron microscopy-energy disperse spectroscopy (SEM-EDS), photoelectric (XPS) enthalpy, entropy heat capacity (HSC) thermodynamic software. According to shape...

Titanium dioxide (TiO2) is one of the most promising photocatalytic materials, but its practical applications are always limited since it could only be excited in UV range and has low efficiency due to wide band gap fast recombination rate. To overcome these problems, transition metals have been used as dopants improve performance titanium dioxide. However, previous investigations shown that do...