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    Wyświetlanie 1-11 z 11
    Tytuł:
    Thin Films and Heterostructures of Layered Oxides: Preparation and Properties
    Autorzy:
    Przysłupski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964241.pdf
    Data publikacji:
    1997-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.Cn
    74.72.Bk
    74.76.-w
    Opis:
    A brief overview of the deposition and properties of YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7}$ (YBCO) based heterostructures is presented. Emphasis is placed on the assessment of the deposition process and the properties of practical thin films and heterostructures of layered oxides. Besides a reference to the literature we present our recent results concerning deposition, structural and magnetic properties of YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7}$ /RE$\text{}_{1-x}$A$\text{}_{x}$MnO$\text{}_{3}$ (YBCO/REMO) heterostructures.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 1; 127-133
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetism and Superconductivity in Nd$\text{}_{0.81}$Sr$\text{}_{0.19}$MnO$\text{}_{3}$/YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7}$ Superlattices
    Autorzy:
    Komissarov, I.
    Przysłupski, P.
    Dłużewski, P.
    Sawicki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037112.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.78.Fk
    75.70.Cn
    Opis:
    We report on the growth, structural and magnetic characterization of Nd$\text{}_{0.81}$Sr$\text{}_{0.19}$MnO$\text{}_{3}$/YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7}$ (NSMO/YBCO) superlattices. The NSMO system for the doping level of x=0.19 is a ferromagnetic insulator. Multilayers with a fixed NSMO thickness of 13 unit cells and a varying YBCO layer thickness from 2 unit cells to 6 unit cells were sputtered on LaAlO$\text{}_{3}$ substrates. An onset of superconducting transition is seen starting from the multilayer with 3 unit cells of YBCO layer thickness. Hysteresis loops recorded above and below the superconducting transition show a signature of interlayer exchange coupling.
    Źródło:
    Acta Physica Polonica A; 2004, 105, 1-2; 127-132
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Superconductivity and Ferromagnetism in $La_{0.67}Sr_{0.33}MnO_3//YBa_2Cu_3O_7$ Nanosized Heterostructures
    Autorzy:
    Lochmajer, H.
    Matusiak, M.
    Urbanik, G.
    Przyslupski, P.
    Rogacki, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398624.pdf
    Data publikacji:
    2016-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.fc
    74.25.fg
    74.78.Fk
    Opis:
    In this work we present recent experimental studies of heterostructures composed of ferromagnetic $La_{0.67}Sr_{0.33}MnO_3$ (LSMO) and superconducting $YBa_2Cu_3O_7$ (YBCO) multilayers grown by dc sputtering method. The transport and magnetic properties of the large set of heterostructures were investigated in a wide temperature range from 2 to 400 K and in fields up to 12.5 T. The resistivity and the upper critical field were measured for samples with the plane active dimensions 1.5× 5 mm². The Nernst effect was studied in the mixed state revealing the characteristic temperature dependence of the Nernst signal which was correlated with variation of the upper critical field. We have observed an influence of the magnetic LSMO layer on the superconducting properties of the adjacent YBCO layer which consists in a substantial reduction of the superconducting critical temperature and a small lowering of the upper critical field.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 2; 588-592
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication and Ferroelectric Properties of BiFeO₃/BaTiO₃ Heterostructures
    Autorzy:
    Aleszkiewicz, M.
    Dybko, K.
    Dynowska, E.
    Dluzewski, P.
    Przyslupski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398586.pdf
    Data publikacji:
    2016-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.85.+t
    77.80.-e
    77.84.-s
    77.84.Bw
    Opis:
    We report on preparation and electrical characterization of the epitaxial BaTiO₃ (BTO), BiFeO₃ (BFO) thin films and BFO/BTO bi- and multilayers, grown on (001) SrTiO₃ (STO) and $(LaAlO_3)_{0.3}(Sr_2TaAlO_6)_{0.7}$ (LSAT) substrates. The ferroelectric properties were characterized using the electric force microscopy method to image and switch the electric domains. This fabrication process opens the routes towards wide study of magnetoelectric effect in complex oxide heterostructures.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 2; 511-515
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Properties of Co and CoFe Electrodes Forming a Magnetic Tunnel Junction
    Autorzy:
    Gładczuk, L.
    Pankowski, P.
    Paszkowicz, W.
    Dłużewski, P.
    Wójcik, M.
    Przysłupski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047237.pdf
    Data publikacji:
    2007-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Hi
    68.65.Ac
    61.10.Nz
    76.60.Lz
    68.37.Lp
    Opis:
    The M$\text{}_{1}$/MgO/M$\text{}_{2}$ trilayer tunnel magnetoresistance systems are studied by means of X-ray diffraction, NMR, and transmission electron microscopy techniques. As M$\text{}_{1}$ and M$\text{}_{2}$ electrodes we used Co, Fe, and CoFe layers. The growth mechanism and structural quality of both electrodes and of the epitaxial MgO barrier forming the magnetic tunnel junctions are experimentally examined. It is shown that the crystallographic coherence of magnetic tunnel junctions across the MgO barrier is significantly disturbed by imperfect crystal structure of magnetic electrodes. The NMR results indicate a difference in short-range order between bottom and top electrodes.
    Źródło:
    Acta Physica Polonica A; 2007, 111, 1; 135-140
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Superconductivity and Magnetism in Nd$\text{}_{0.5}$Sr$\text{}_{0.5}$MnO$\text{}_{3}$/YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7}$ Superlattices
    Autorzy:
    Tsarou, A.
    Paszkowicz, W.
    Minikayev, R.
    Dłużewski, P.
    Sawicki, M.
    Przysłupski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047250.pdf
    Data publikacji:
    2007-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.78.Fk
    75.70.Cn
    Opis:
    We report the synthesis and characterization of Nd$\text{}_{0.5}$Sr$\text{}_{0.5}$MnO$\text{}_{3}$/YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7}$ superlattices. X-ray diffraction studies show that the superlattices are [001] oriented. We observe that the magnetic ground state of Nd$\text{}_{0.5}$Sr$\text{}_{0.5}$MnO$\text{}_{3}$ system in a multilayered structure is strongly dependent on the substrate.
    Źródło:
    Acta Physica Polonica A; 2007, 111, 1; 179-183
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Signature of the Spin Triplet Phase in $La_{0.7}Sr_{0.3}MnO_3$/$Yba_2Cu_3O_7$/$La_{0.7}Sr_{0.3}MnO_3$ Trilayers
    Autorzy:
    Przyslupski, P.
    Dybko, K.
    Werner-Malento, K.
    Aleshkevych, P.
    Wojcik, M.
    Sawicki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1536907.pdf
    Data publikacji:
    2010-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.78.Fk
    75.70.Cn
    77.84.Bw
    Opis:
    Differential dynamical subgap transport measurements were performed on LSMO/YBCO/LSMO trilayers to probe local evolution of the Andreev bound states which are manifested as the zero bias conductance peak. Dynamical conductivity dI/dV vs. magnetic field measured in current in plane and current perpendicular to plane geometries show nonmonotonic behavior with maximum at about 500 Oe. The shape of the zero bias conductance peak measured in current in plane geometry is sharp, whereas zero bias conductance peak measured in current perpendicular to plane geometry demonstrates V shape. These shapes of the zero bias conductance peak were predicted theoretically for unconventional p-wave spin triplet phase superconductor and superconductor with d-wave symmetry of the order parameter, respectively.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 2; 313-315
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Barrier and Self-Energy Effects in Manganite Tunneling Characteristics
    Autorzy:
    Svistunov, V.
    Revenko, Y.
    Belogolovskii, M.
    Gerasimenko, A.
    Pashkevich, Y.
    Szymczak, H.
    Przyslupski, P.
    Komissarov, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037099.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Gk
    75.47.Lx
    Opis:
    Tunneling conductance spectra of point-contact junctions formed by a sharp Ag tip and two optimally doped manganites La$\text{}_{0.67}$Sr$\text{}_{0.33}$MnO$\text{}_{3}$ and Nd$\text{}_{0.67}$ Sr$\text{}_{0.33}$MnO$\text{}_{3}$ are measured and analyzed. It was found that the analytical dependence of the differential conductance on voltage strongly depends on the bias sign and dramatically changes after voltage treatments. The data obtained are explained in terms of the Glasman-Matveev model for tunneling across two localized states settled in the barrier near the manganite bulk. Effective functions of electron-boson interaction extracted from self-energy contributions to the experimental characteristics contain signs of phonon and magnon excitations, higher-energy satellites as a result of possible orbital ordering and a hallmark of localized states in the near-barrier region in the form of strong not-well reproduced peaks.
    Źródło:
    Acta Physica Polonica A; 2004, 105, 1-2; 87-92
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multifunctional $La_{0.7}Sr_{0.3}MnO_3-YBa_2Cu_3O_7$ Heterostructures
    Autorzy:
    Przyslupski, P.
    Dybko, K.
    Tsarou, A.
    Werner-Malento, K.
    Sawicki, M.
    Laviano, F.
    Gozzellino, L.
    Mezzetti, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812263.pdf
    Data publikacji:
    2008-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.78.Db
    74.72.Bk
    75.70.Cn
    Opis:
    Complex perovskite oxides exhibit a rich spectrum of functional responses such as: superconductivity, magnetism etc. Combination of different oxides in multilayered structures increases the number of physical responses. Heterogeneous oxide structures represent a new class of nanostructures. They consist of ferromagnetic $La_{0.67}Sr_{0.33}MnO_3$ (F-LSMO) manganite and superconducting $YBa_2Cu_3O_7$ (Sc-YBCO) cuprate. The interaction between the two order parameters gives rise to new physical effects. In this review we will discuss various physical effects obtained in the bilayer and trilayer heterostructures. For example, the LSMO/YBCO bilayer structures are used to study the mechanism of magnetic pinning. The other possibility is the fabrication of spin valve-like structures LSMO/YBCO/LSMO. The spin dependent transport in trilayer structure was studied taking into account crossed Andreev reflection and electron co-tunneling processes.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 1; 15-22
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magneto-Optics of Spontaneous and Field Induced Vortices in Twinned YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$/La$\text{}_{1-x}$Sr$\text{}_{x}$MnO$\text{}_{3}$ Bilayers
    Autorzy:
    Gerbaldo, R.
    Ghigo, G.
    Gozzelino, L.
    Laviano, F.
    Mezzetti, E.
    Minetti, B.
    Przysłupski, P.
    Tsarou, A.
    Wiśniewski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047210.pdf
    Data publikacji:
    2007-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.25.Qt
    74.78.Db
    74.78.Fk
    Opis:
    The electromagnetic coupling between the magnetic and the superconducting layers in perovskite heterostructures is investigated by means of the magneto-optical technique. The quantitative imaging of the magnetic field distribution allows the high-resolution reconstruction of local supercurrent density. Two phenomena arising from the coupling between manganite layer and the YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ superconducting film deposited on top are addressed, i.e., the local effects of the electronic coupling between the compounds and the interaction between the manganite magnetic moments and the vortices in the superconductor. The first issue can be quantified in terms of the local superfluid density depression/enhancement in correspondence to the underlying magnetic structure, both domains and domain walls (in dependence on the orientation and sign of the local magnetization) and of the spontaneous, macroscopic screening current loops generated by the manganite domain walls. The interaction between the local manganite magnetization and the superconducting vortices is also influenced by structural defects because they modulate the magnetic pattern of the manganite. Different channelling phenomena in correspondence to the natural twin boundaries of the substrate, but locally magnetized by pinned domain walls of the manganite on their locations, are recognized.
    Źródło:
    Acta Physica Polonica A; 2007, 111, 1; 47-55
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Magnetic Characterization οf $BiFeO_3$/$YBa_2Cu_3O_7$ Bilayers
    Autorzy:
    Werner-Malento, K.
    Tsarou, A.
    Dluzewski, P.
    Paszkowicz, W.
    Minikayev, R.
    Sawicki, M.
    van der Beek, Kees
    Konczykowski, M.
    Przyslupski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810309.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.78.Fk
    75.70.Cn
    77.84.Bw
    Opis:
    Bilayered epitaxial $BiFeO_3$/$YBa_2Cu_3O_7$ films were fabricated on (100) $[(LaAlO_3)_{0.3}(Sr_2TaAlO_6)_{0.7}]$ substrates by sputtering method. For structural comparison the bilayered $BiFeO_3$/$La_{0.67}Sr_{0.33}MnO_3$ films were also deposited on (100) $SrTiO_3$ substrates. A weak ferromagnetic moment is observed in $BiFeO_3$/$YBa_2Cu_3O_7$ films. The mechanism responsible for weak ferromagnetic moment arises presumably from the epitaxy strain induced canted antiferromagnetic structure.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 95-97
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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