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Theory of photoacoustic effect in media with thermal memory
(Journal of Applied Physics, 2014)
This paper presents a model for indirect photoacoustic response that includes thermal memory effects. At low frequencies, the model reduces to the well-known thermal piston model of photoacoustic response given by Rosencweig ...
Growth-induced non-planar magnetic anisotropy in FeCoZr-CaF2 nanogranular films: Structural and magnetic characterization
(Journal of Applied Physics, 2014)
The relation between nanoscale structure, local atomic order and magnetic properties of (FeCoZr)(x)(CaF2)(100-x) (29 LT = x LT = 73 at. %) granular films is studied as a function of metal/insulator fraction ratio. The films ...
Investigation of surface defect states in CeO2-y nanocrystals by Scanning-tunneling microscopy/spectroscopy and ellipsometry
(Journal of Applied Physics, 2014)
Synthesis process strongly influences the nanocrystalline CeO2-y defective structure. The presence of surface defects, in the form of oxygen vacancies in different charge states (F centers), can change the electronic ...
Effect of the absorption coefficient of aluminium plates on their thermoelastic bending in photoacoustic experiments
(Journal of Applied Physics, 2015)
The open-cell photoacoustic signal measured in the transmission configuration for aluminum thin plates with thicknesses of 280 mu m, 197 mu m, and 112 mu m is experimentally and theoretically analyzed, in the 20 Hz-7 kHz ...
Influence of size distribution and field amplitude on specific loss power
(Journal of Applied Physics, 2015)
Herein we present the results of specific loss power (SLP) analysis of polydisperse water based ferrofluids, Fe3O4/PEG200 and Fe3O4/PEG6000, with average Fe3O4 particle size of 9 nm and 11 nm, respectively. Specific loss ...
Structural analysis of silicon co-implanted with carbon and high energy proton for the formation of the lasing G-centre
(Journal of Applied Physics, 2012)
We investigate a new approach for efficient generation of the lasing G-centre (carbon substitutional-silicon self-interstitial complex) which crucially is fully compatible with standard silicon ultra-large-scale integration ...
Influence of size/crystallinity effects on the cation ordering and magnetism of alpha-lithium ferrite nanoparticles
(Journal of Applied Physics, 2012)
alpha-lithium ferrite (Li0.5Fe2.5O4) nanoparticles have been prepared using two synthesis routes: citrate gel decomposition as well as the Pechini method. Analysis of HRTEM images of the particles showed that they have a ...
Luminescence thermometry below room temperature via up-conversion emission of Y2O3:Yb3+, Er3+ nanophosphors
(Journal of Applied Physics, 2014)
This study explores potential of Er3+-Yb3+ doped phosphors for up-conversion luminescence thermometry in the temperature range from 10 K to 300 K. Yttrium oxide nanopowder doped with trivalent ytterbium and erbium ions ...
Size effect of the subharmonic Shapiro steps on the interference phenomena in the Frenkel-Kontorova model with realistic substrate potentials
(Journal of Applied Physics, 2013)
Size effect of the subharmonic Shapiro steps on the behavior of harmonic ones is studied in the ac driven overdamped Frenkel-Kontorova model with different types of physically important realistic substrate potentials. The ...
Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles
(Journal of Applied Physics, 2012)
We present a study of the structural and magnetic properties of (Mn,Fe)(3-delta)O-4 nanoparticles synthesized by soft mechanochemistry using Mn(OH)(2) x 2 H2O and Fe(OH)(3) powders as starting compounds. The resulting ...