Search Results - "Mihalache, V."

Magnetic behaviors of exchange-biased Fe(FM)-FeO(AFM)-ZnO nanocomposites of different iron concentrations prepared under non-identical conditions with annealing in a reducing atmosphere by Mihalache, V.

“…[Display omitted] •Nanocomposites of FeO (AFM), Fe (FM) and ZnO by reduction of sol–gel-derived precursors.•M vs H and LT peak in the ZFC reveal a…”
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Effect of the process control agent in the ball-milled powders and SPS-consolidation temperature on the grain refinement, density and Vickers hardness of Fe14Cr ODS ferritic alloys by Mihalache, V., Mercioniu, I., Velea, A., Palade, P.

“…Fe-14Cr-0.4Ti-0.25Y2O3 ferritic steels were produced by varying the amount of residual process control agent, PCA (ethanol), in the ball-milled powders and…”
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Defect states and room temperature ferromagnetism in cerium oxide nanopowders prepared by decomposition of Ce-propionate by Mihalache, V., Secu, M., Grivel, J.C.

“…Four batches of cerium oxide powders (with nanocrystallite size of 6.9 nm–572 nm) were prepared from four precursor nanopowders by thermal decomposition of…”
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Grain growth, microstructure and surface modification of textured CeO2 thin films on Ni substrate by MIHALACHE, V, PASUK, I

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Relationship between ferromagnetism and, structure and morphology in un-doped ZnO and Fe-doped ZnO powders prepared by hydrothermal route by Mihalache, V., Cernea, M., Pasuk, I.

“…The magnetic properties, in the 5 K–350 K temperature range, were investigated in relationship with the structure and morphology of Zn1−xFexO (x = 0, 0.01,…”
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Temperature dependence and defect related structure, photoluminescence, (ferro)magnetism and ammonia sensitivity of un-doped nanocrystalline ZnO by Mihalache, V., Secu, M., Negrila, C., Bercu, V., Mercioniu, I., Leca, A.

“…[Display omitted] •ZnO prepared by decomposition of Zn-propionate and annealing at 400–970 °C show RTFM.•g = 2.0065 and g = 1.9632 EPR signals. A prominent…”
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Thermal analysis and microstructure of oxide dispersion strengthened ferritic steels produced by ball milling with different amounts of process control agent by Mihalache, V., Aldica, G., Pasuk, I., Mercioniu, I.

“…Fe–14Cr–3 W–0.4Ti–0.25Y 2 O 3 ferritic steels were produced by ball milling of initial mixture of elemental powders with various amounts of process control…”
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Effect of the supersaturation with nitrogen on the structure refinement and magnetic properties of mechanically alloyed and heated Fe14Cr ferritic alloys by Mihalache, V., Pasuk, I., Mercioniu, I.

“…Nano-nitride reinforcement of Fe–Cr alloys are under intense investigations, e.g., along with oxide-strengthened, nitride-strengthened reduced activation…”
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Defect structures and (ferro)magnetism in Zn1-xFexO nanoparticles with the iron concentration level in the dilute regime (x = 0.001 – 0.01) prepared from acetate precursors by Mihalache, V., Negrila, C., Secu, M., Mercioniu, I., Iacob, N., Kuncser, V.

“…Superexchange coupling (resembling that in the inverse spinel ZnFe2O4) between Fe3+ in defective sites – a hypothesised mechanism for RTFM in 0.1 – 1 at.%…”
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The Quality of Fe14Cr ODS Powder Alloys During Milling and Upon Heating and Its Impact on the Mechanical Properties of Consolidated Steels by Mihalache, V., Walter, M., Mercioniu, I., Ordas, N.

“…Oxide dispersion-strengthened ferritic steels (ODSFSs) are promising structural materials for applications in fusion and fission power reactors, but further…”
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B4C in ex-situ spark plasma sintered MgB2 by Burdusel, M., Aldica, G., Popa, S., Enculescu, M., Mihalache, V., Kuncser, A., Pasuk, I., Badica, P.

“…Powder mixtures of MgB2 and B4C with composition ((MgB2) + (B4C)x, x = 0.005, 0.01, 0.03) were consolidated by Spark Plasma Sintering at 1150 °C for 3 min. The…”
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pinning force density in polycrystalline Bi₁.₈Pb₀.₄Sr₂Ca₂₋ₓYₓCu₃Oy multiphase systems by Mihalache, V, Deac, I.G, Pop, A.V, Miu, L

“…ac susceptibility measurements as a function of temperature T and the ac magnetic field amplitude, Hₐc, have been performed on five superconducting…”
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Bean-Livingston surface barriers for flux penetration in Bi2Sr2CaCU2O8+δ single crystals near the transition temperature by MIHALACHE, V, DEDE, M, ORAL, A, MIU, L

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Quasi-2D characteristics in the ac susceptibility response of polycrystalline (Bi,Pb)SrCaCuO/2223 multiphase systems by Mihalache, V., Cosereanu, L., Miu, L.

“…Fundamental and third harmonic ac susceptibility measurements as a function of temperature T, ac magnetic field, and dc magnetic field have been performed on…”
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Vortex imaging with varying temperature revealed by SHPM on Bi2Sr2CaCu2O8+y by Mihalache, V., Dede, M., Oral, A., Sandu, V.

“…Scanning Hall probe microscopy with an effective spatial resolution of ∼1μm has been used to investigate the vortex structures in superconducting…”
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Grain growth, microstructure and surface modification of textured CeO 2 thin films on Ni substrate by Mihalache, V., Pasuk, I.

“…CeO 2 films were prepared from solutions of different concentrations (0.05–1.0 M) on textured Ni substrates. Homogeneous nucleation and growth of CeO 2…”
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Addition of Li-based salts into superconducting Bi1.8Pb0.4Sr1.8Ba0.2Ca2Cu3Ox ceramic by Mihalache, V, Aldica, Ghe-V, Badica, P

“…Li-based salts M such as LiF, LiCI and Lil were introduced into Bi1.8Pb0.4Sr1.8Ba0.2Ca2Cu3Ox superconducting ceramic. Samples were prepared by solid state…”
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Synthesis of Bi(Pb)-2223 from two different precursors with the same stoichiometry by Mihalache, V, Aldica, G, Badica, P

“…Samples of (Bi,Pb)2Sr2Ca2Cu3O10 (Bi(Pb)-2223) phase have been fabricated from two different oxide precursors with the same stoichiometry, synthesized by solid…”
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Superconducting properties of iodine-intercalated Bi2Sr2Ca2Cu3O10+x by MIHALACHE, V, ALDICA, G, MIU, D

“…The superconducting properties of iodine-intercalated high-temperature superconducting Bi2Sr2Ca2Cu3O10+x phase (Bi-2223) were systematically studied. It was…”
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The specifics of national regional development strategy of the republic of Moldova by Tofan, Tatiana M, Mihalache, Sveatoslav V, Frunze, Oleg B

“…The experience in the Republic of Moldova during 2010-2014 period to implement the National Strategy of Regional Development, has demonstrated the need to…”
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