Výsledky vyhledávání - "Ioana Cristina Bucur"

CO adsorption and oxidation at room temperature on graphene synthesized on atomically clean Pt(001)

Autor: Cristian M. Teodorescu, Ioana Cristina Bucur, Nicoleta G. Apostol, Cristian A. Tache, G. A. Lungu

Publikováno v: Catalysis Today. 366:155-163

Carbon monoxide is adsorbed at room temperature on graphene formed on atomically clean Pt(001)–hex by chemical vapor deposition, starting with ethylene, in ultrahigh vacuum. The graphene formation is characterized in situ by high resolution photoel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0898272508396b6f4d2db294778f327b
https://doi.org/10.1016/j.cattod.2020.02.006

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Room temperature ferromagnetism and its correlation to ferroelectricity of manganese embedded in lead zirco-titanate

Autor: Lucian Pintilie, Nicoleta G. Apostol, Cristina Chirila, Ruxandra M. Costescu, Cristian M. Teodorescu, Lucian Trupina, Ioana Cristina Bucur, Laura Elena Abramiuc, Cristian A. Tache, G. A. Lungu, Liviu Cristian Tanase

Publikováno v: Thin Solid Films. 669:440-449

Manganese is deposited at high temperature on (001) oriented ferroelectric lead zirco-titanate prepared in two different ways: sputter-annealed or just simply annealed in ultrahigh vacuum. Room temperature ferromagnetism (FM) is obtained for Mn depos

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::696c259ca98588d2763216de21a6cd28
https://doi.org/10.1016/j.tsf.2018.11.018

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Triggering surface ferroelectric order in Pb(Zr,Ti)O3(001) by deposition of platinum

Autor: Cristina Chirila, Raluca Negrea, Lucian Pintilie, Laura Elena Abramiuc, Nicoleta G. Apostol, Lucian Trupina, Cristian M. Teodorescu, Ioana Cristina Bucur, Ruxandra M. Costescu, G. A. Lungu, Liviu Cristian Tanase

Publikováno v: Applied Surface Science. 432:27-33

By platinum deposition on a 150 nm thick film of lead zirco-titanate oriented PZT(001), grown on strontium titanate (001) single crystals with a strontium ruthenate buffer layer, which did not show initial preferential out-of-plane orientation of its

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::59e4ab5a5070b7eca03d5ec24b5d47ad
https://doi.org/10.1016/j.apsusc.2017.04.238

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Long-range magnetic interaction in Mn $$_{x}$$ x Ge $$_{1-x}$$ 1 - x : structural, spectromicroscopic and magnetic investigations

Autor: Nicoleta G. Apostol, C. M. Teodorescu, Laura Elena Abramiuc, Alexey Barinov, D. Macovei, George-Adrian Lungu, Ioana Cristina Bucur, Liviu Cristian Tanase, Cristian-Alexandru Tache, Ruxandra M. Costescu

Publikováno v: Journal of Materials Science. 52:3309-3320

We report the structural, electronic and magnetic investigation using extended X-ray absorption fine structure spectroscopy (EXAFS), photoelectron microscopy, spin-resolved photoemission and magneto-optical Kerr effect on the properties of Mn $$_{x}$

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ecc53e68476d539a5c3aca1f251f5606
https://doi.org/10.1007/s10853-016-0618-9

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Growth mechanisms and band bending in Cu and Pt on Ge(001) investigated by LEED and photoelectron spectroscopy

Autor: George-Adrian Lungu, Amelia Elena Bocîrnea, Ruxandra M. Costescu, Laura Elena Abramiuc, Liviu Cristian Tanase, Andreea Bianca Şerban, Cristian M. Teodorescu, Ioana Cristina Bucur

Publikováno v: Surface Science. 653:97-106

We investigate band bending effects occurring at the interface between atomically clean Ge(001) and molecular beam epitaxy (MBE) deposited copper and platinum. Low energy electron diffraction (LEED) confirmed the crystallinity of the surface, evidenc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a72f13b9df81ba4b6e0928fba846cdab
https://doi.org/10.1016/j.susc.2016.06.006

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Mechano-chemical versus co-precipitation for the preparation of Y-modified LDHs for cyclohexene oxidation and Claisen-Schmidt condensations

Autor: Rodica Zăvoianu, Emilian Angelescu, Ioana Cristina Bucur, Octavian Dumitru Pavel, Alexandra-Elisabeta Stamate, Vasile I. Pârvulescu, Ruxandra Bîrjega

Publikováno v: Applied Catalysis A: General. 605:117797

Y-modified LDHs with atomic Mg2+/(Al3++Y3+) of 3 and Al3+/Y3+ ratios of 0.5, 1 and 1.5 were prepared following two preparation methods, i.e. the co-precipitation and mechano-chemical one. The substitution of Al by Y in the brucite-type layer was less

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d66fec48c6ccc12ecace533ef157fea3
https://doi.org/10.1016/j.apcata.2020.117797

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Polarization Orientation in Lead Zirconate Titanate (001) Thin Films Driven by the Interface with the Substrate

Autor: Ioana Cristina Bucur, Ana-Maria Trandafir, Lucian Pintilie, Cristian M. Teodorescu, Dana G. Popescu, Nicoleta G. Apostol, Iuliana Pasuk, L. Hrib, Liviu Cristian Tanase, Laura Elena Abramiuc, Lucian Trupina

Publikováno v: Physical Review Applied. 10

The orientation of polarization in ferroelectric thin films is important for applications of these materials in nonvolatile memory and field-effect transistors with ferroelectric gates, and in catalysis and photocatalysis. One means of control is to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da090933c1c6da13acdc87a8b7a28eb8
https://doi.org/10.1103/physrevapplied.10.034020

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Low-energy electron diffraction from ferroelectric surfaces: Dead layers and surface dipoles in clean Pb(Zr,Ti)O3(001)

Autor: L. Hrib, Cristian M. Teodorescu, Lucian Pintilie, Lucian Trupina, Nicoleta G. Apostol, Ioana Cristina Bucur, Liviu Cristian Tanase, Amelia Elena Bocîrnea, Ruxandra M. Costescu, G. A. Lungu

Publikováno v: Physical Review B. 96

The positions of the low energy electron diffraction (LEED) spots from ferroelectric single crystal films depend on its polarization state, due to electric fields generated outside of the sample. One may derive the surface potential energy, yielding

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::835ca90004e2c29c13b72eee63eb6d88
https://doi.org/10.1103/physrevb.96.115438

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Room Temperature Ferromagnetic Mn:Ge(001)

Autor: Florin Vasiliu, C. M. Teodorescu, Ioana Cristina Bucur, Nicoleta Răduţoiu, Laura E. Stoflea, Liviu Cristian Tanase, Ionel Mercioniu, Victor Kuncser, G. A. Lungu

Publikováno v: Materials
Volume 7
Issue 1
Pages 106-129
Materials, Vol 7, Iss 1, Pp 106-129 (2013)

We report the synthesis of a room temperature ferromagnetic Mn-Ge system obtained by simple deposition of manganese on Ge(001), heated at relatively high temperature (starting with 250 °C). The samples were characterized by low energy electron diffr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a2cec8c97eae6830782f2fbd3ec97b9
https://doi.org/10.3390/ma7010106

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