A. A. Kamenev

Epitaxial phase stabilisation phenomena in rare earth manganites

Abstract Using injection, powder-flash and band-flash MOCVD techniques, epitaxial thin films of Nd, Ho, Y, Tm, Dy and Lu manganites were prepared. The formation of high-pressure phase NdMn 7 O 12 as a thin surface layer on Pnma Nd 1− x MnO 3+δ ( x ∼0.15) in an Nd-deficient system and HoMnO 3 , YMnO 3 , TmMnO 3 and LuMnO 3 as perovskite phases (known in the bulk only as high-pressure phases) on a LaAlO 3 substrate were observed. The remarkable reduction in the pressure needed for formation of the phases in epitaxial films in comparison with bulk samples is a manifestation of the epitaxial stabilisation discussed in the paper. The details of the crystal and domain structure of the films as observed by X-ray diffraction (XRD), selected-area electron diffraction (SAED) and high-resolution electron microscopy (HREM) techniques are described.

Phase diagram and isotope effect in ( Pr 1 − y Eu y ) 0.7 Ca 0.3 CoO 3 cobaltites exhibiting spin-state transitions

We present the study of magnetization, thermal expansion, specific heat, resistivity, and ac susceptibility of

Effect of Eu doping and partial oxygen isotope substitution on magnetic phase transitions in (Pr1 − yEuy)0.7Ca0.3CoO3 cobaltites

{({\text{Pr}}_{1\ensuremath{-}y}{\text{Eu}}_{y})}_{0.7}{\text{Ca}}_{0.3}{\text{CoO}}_{3}

Chemical deposition of smooth nanocrystalline Y2O3 films from solutions of metal-organic precursors

cobaltites. The measurements were performed on ceramic samples with

Magnetotransmission and magnetoresistance in film manganite/ferrite heterostructures

y=0.12--0.26

MOCVD Buffer and Superconducting Layers on Non-Magnetic Biaxially Textured Tape for Coated Conductor Fabrication

and

Spin-State Transition, Magnetism and Local Crystal Structure in Eu1-xCaxCoO3-δ

y=1

Effect of Partial Oxygen Isotope Substitution on the Phase Diagram of (Pr1-yEuy)0.7Ca0.3CoO3 Cobaltites

. Based on these results, we construct the phase diagram, including magnetic and spin-state transitions. The transition from the low-to-intermediate spin state is observed for the samples with

Synthesis and characterization of amorphous yttrium oxide layers by metal organic chemical solution deposition

yg0.18

Epitaxial variant structures of the perovskite manganites with the high tunnel magnetoresistance

, whereas for a lower Eu-doping level, there are no spin-state transitions, but a crossover between the ferromagnetic and paramagnetic states occurs. The effect of oxygen isotope substitution along with Eu doping on the magnetic/spin state is discussed. The oxygen-isotope substitution (