We report on a study of thin (500–4000 Å) and ultrathin (100–500 yttrium–iron–garnet (YIG) films deposited onto amorphous quartz substrates by the pulsed laser deposition technique. The growth conditions well-formed polycrystalline have been determined. crystalline structure magnetic behavior are strongly influenced processes occurring film–substrate interface. Primarily, strain due to difference in thermal expansion coefficients film substrate induces uniaxial anisotropy. Another source...

We have studied the influence of stoichiometry on structural, magnetic, and magneto-optical properties bismuth iron garnet $({\text{Bi}}_{3}{\text{Fe}}_{5}{\text{O}}_{12})$ thin films grown by pulsed laser deposition. Films with different stoichiometries been obtained varying Bi/Fe ratio target oxygen pressure during Stoichiometry variations Curie temperature ${T}_{C}$ tuning (Fe)-O-[Fe] geometry: increases when lattice parameter decreases, contrary to what happens in case stoichiometric...

Abstract We performed a magneto-optical (MO) Faraday spectroscopy study of bismuth iron garnet Bi 3 Fe 5 O 12 thin single-crystalline films with thickness from to 220 nm. The rotation and ellipticity spectra were measured for photon energies ranging 1.7 4.2 eV. Using model based on two electric dipole transitions associated tetrahedral octahedral sites, we successfully reproduce the observed spectra. sign both site contributions has been used interpret complex thermal dependence ellipticity....

Using femtosecond optical pulses, we have investigated the ultrafast magnetization dynamics induced in a dielectric film of bismuth-substituted yttrium iron garnet (Bi-YIG) buried below thick Cu/Pt metallic bilayer. We show that exciting sample from Pt surface launches an acoustic strain pulse propagating into film. discovered this induces coherent precession Bi-YIG at frequency ferromagnetic resonance. The observed phenomena can be explained by strain-induced changes magnetocrystalline...

Thin magnetic layers have been prepared by pulsed-laser deposition from targets of the orthoferrites: DyFeO3, GdFeO3, SmFeO3, and YFeO3. All were deposited onto quartz substrates at a temperature 450 °C under high-vacuum conditions, i.e., in absence additional oxygen. The as-grown films show evidence following phases: RFeO3, R3Fe5O12, Fe3O4, R2O3, where R=Dy, Gd, Sm, Y. properties these investigated using superconducting quantum interference device magnetometry magneto-optic (Faraday...

We present the magnetic and calorimetric results obtained on a single ${\mathrm{Al}}_{68.7}$${\mathrm{Pd}}_{21.7}$${\mathrm{Mn}}_{9.6}$ quasicrystal grain. show that few Mn's are really carry large spin. These spins coupled by Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions yielding spin-glass transition at 1.1 K. Surprisingly, RKKY potential is found to equal of metastable Al-Mn quasicrystals crystalline Cu-Mn. In contrast with case melt-spun quasicrystals, linear T term specific heat...

Direct current (dc) electrical transport properties (resistivity and Hall) spectroscopic ellipsometric measurements have been combined to study high-quality epitaxial thin films of LaNiO3 (LNO) on SrTiO3 (001) substrates. Stoichiometry was changed by varying the oxygen partial pressure between 240 420 μbar during growth in a pulsed laser deposition setup. Structural temperature-dependent conform LaNiO3. The data, measured 350–850 nm spectral range, are adjusted with dispersion relation...

The possibility to control the magnetic properties of a material with an electric field at room temperature is highly desirable for modern applications. Moreover, coupling between and orders within single presenting wide range exceptional physical properties, such as bismuth iron garnet (BIG), may lead great advances in spintronic In particular, combination magnetoelectric (ME) low damping spin waves BIG can allow manipulation by magnonic devices. Here we report unambiguous observation...

SrVO 3 (SVO) is a model system for strongly correlated oxides and highly promising as conductive layer in heterostructures. Therefore, the control of electronic properties morphology are essential advanced applications. Here, oxygen stability during after deposition explored, SVO film expected to undergo different postdeposition thermal atmosphere treatments its integration heterostructure. Hence, influence on electrical metallic grown by pulsed laser has been investigated. Films under...

The sputter deposited NiZn ferrite thin films were studied as a function of annealing temperature. magnetization showed monotonic increase with increasing coercivity shows minimum at temperature 400 °C and value 14 Oe. Transmission electron microscopy study indicated that the grain size increases from ∼3 nm for as-deposited case to ∼15 film annealed 800 °C. observed behavior could be attributed defects present in films, change cation distribution, growth.

This article reports on the magnetism of continuous and patterned bismuth iron garnet (Bi3Fe5O12 or BIG) thin films for magnetophotonic crystal (MPC) applications. The exact knowledge magnetic properties is crucial design fully functional MPC. BIG were grown several types isostructural substrates by pulsed laser deposition. growth conditions transfer optimized to obtain good quality magneto-optically active compatible with nanostructuring process. MPC successfully fabricated from...

We demonstrate that femtosecond laser pulses allow triggering high-frequency standing spin-wave modes in nanoscale thin films of a bismuth-substituted yttrium iron garnet. By varying the strength external magnetic field, we prove two distinct branches dispersion relation are excited for all modes. This is reflected particular at very weak field (∼33 mT) by spin dynamics with frequency up to 15 GHz, which times higher than one associated ferromagnetic resonance mode. argue this phenomenon...

A series of thin and ultrathin (<500 Å thick) polycrystalline yttrium iron garnet (YIG) films has been prepared on quartz substrates by the pulsed laser deposition technique to study effects dimensional changes magnetic properties. The film thickness was varied from 100 3800 Å. Saturation magnetization decreased rapidly in with decreasing thickness. lattice cell all samples found be slightly distorted though elementary volume one a bulk crystal. Curie temperature did not differ YIG value....

The nanometric scale allows an investigation of the Verwey transition: impact varying degree oxidation Fe cations on this transition was studied by means zero-field-cooled superconducting quantum interference device measurements in highly nonstoichiometric particles pure and Ti-substituted magnetite synthesized using soft chemistry route. It is clearly shown that (i) there a shift towards higher temperatures for nanometer scaled compounds (ii) amplitude, temperature, order are only depending...

We demonstrate how controlled changes in oxygen stoichiometry tune the magnetic properties and superexchange interaction, thus providing a simple efficient method to elaborate oxides with strongly modified semiconductor properties. Structural of model system yttrium iron garnet (YIG) thin films were tuned by controlling stoichiometry. The YIG phase diagram has been explored creating cation vacancies during film growth pulsed laser deposition. Especially, unexplored thermodynamic equilibrium...

The angular dependence of the upper critical field ${H}_{c2}$ ${\mathrm{UPt}}_{3}$ in magnetic fields up to 0.85 T has been measured. In spark cut single crystals a sixfold modulation resistivity is observed at superconducting transition basal plane. This vanishes as temperature approaches ${T}^{*}$ discontinuity slope ($T$)] and reappears for $T<{T}^{*}$ but with opposite sign. results provide important new evidence on nature change order parameter its possible coupling antiferromagnetism.

The authors demonstrate herein that by lowering of a growth temperature they can obtain ZnMnO layers with homogeneous Mn distribution, which are free accumulations and inclusions foreign phases due to other oxides. These (with low content fractions) show paramagnetic phase in room magnetization measurements. Contribution high ferromagnetic is missing, the relate blocking spinodal decomposition under controlled conditions atomic layer deposition.

An in situ spectroscopic ellipsometry study has been performed to investigate $\mathrm{La}\mathrm{Ni}{\mathrm{O}}_{3\ensuremath{-}x}$ phase transition associated with oxygenation and/or reduction reversible treatments. Epitaxial thin films of $\mathrm{La}\mathrm{Ni}{\mathrm{O}}_{3}$ were deposited onto $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ (001) substrates by pulsed laser deposition. Reduction oxygen stoichiometry these under high vacuum, which leads compound the formula...