ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Structure and magnetism of transition-metal–magnesium thin films with an artificially layered structure (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 4113-4122 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Transition-metal–magnesium (TM-Mg) thin films, Fe-Mg, Co-Mg, and Ni-Mg, with an artificially layered structure are formed by the magnetron sputtering method. TM and Mg grow epitaxially on the closest planes in films with a thicker Co layer than a Mg layer. Crystallographic structures of the films are the bcc with the 〈110〉 direction normal to the film plane for Fe-Mg films, the hcp with the 〈001〉 normal for Co-Mg films, and the fcc with the 〈111〉 normal for Ni-Mg films. The films, composed of a monatomic layer of Mg and then several atomic layers of TM in an alternating way, show a clearly separated spot pattern in the reflection high-energy electron diffraction analysis. The artificial superlattice structure of the films is thermally stable at temperatures up to 700 K. The films composed of a thicker TM layer than a Mg layer are ferromagnetic with an easy magnetization direction in the film plane. The magnetization of TM in all films is smaller than that of the bulk. The paramagnetism or the nonmagnetism is observed in the films composed of a thinner TM layer than a Mg layer. Small magnetization, i.e., paramagnetism or nonmagnetism, originates from decreases both in magnetization and in Curie temperature of the TM due to lattice deformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341321
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The water gas shift reaction assisted by a palladium membrane reactor (1991)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 30 (1991), S. 585-589 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00051a022
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Crystallographic structure and superconductive properties of Nb-Ti films with an artificially layered structure (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 7493-7506 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Artificially layered niobium-titanium (Nb-Ti) films with various thickness ratios (3/1–1/3) and periodicities (2–100 A(ring)) are made in an argon or in a mixed argon/nitrogen atmosphere by a dc magnetron sputtering method. Films with small periodicities (less than 30 A(ring)) have an artificial superlattice structure (ASL) with crystallographic coherence between constituent layers, where Nb and Ti grow epitaxially on the closest planes. The crystallographic structures of films are bcc with the (110) plane parallel to the film for films with the same or a thicker Nb layer than a Ti layer, and hcp with the (001) plane parallel to the film for films with a thinner Nb layer than a Ti layer. Films with large periodicities have an artificial superstructure (ASS) with only periodic stacking of constituent layers. Films deposited in the Ar/N atmosphere also have the artificially layered structures of ASL or ASS. The artificially layered structure is thermally stable at temperatures up to 500 °C. The superconducting properties of the films depend strongly on the periodicity and thickness ratio of Nb and Ti layers. The dependence of the transition temperature on the periodicity and thickness ratio is qualitatively explained by a proximity effect with a three-region model. Films with periodicities less than 20 A(ring), composed of the same or a thicker Nb layer than a Ti layer, show high transition temperatures (above 9.3 K). The highest Tc of about 13.6 K is obtained in the film composed of monatomic layers of constituents deposited in an Ar atmosphere including 30 vol % N.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345809
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Crystallographic structure and magnetism of Co-Pd and Co-Pt films with an artificially layered structure (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6424-6433 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cobalt-noble metal (Co-NM, NM; Pd and Pt) thin films deposited in an alternating multilayer structure by the magnetron dc-sputtering method have an artificial superlattice structure, where Co and NM grow epitaxially on the closest planes of them and a compositionally sharp interface is fabricated. Films with a small periodicity have either a hexagonal closed pack (hcp) structure with the c axis normal to the film plane or a face centered cubic structure (fcc) with the 〈111〉 axis normal to the film plane, depending on the thickness ratio of Co and NM layers. A long-range crystalline order is hardly maintained due to generation of the crystalline phases of Co and NM in films with a large periodicity. The artificial superlattice structure of the films is thermally stable to temperatures up to 500 °C. Many films are ferromagnetic with an easy magnetization direction in the film plane. The perpendicular magnetization hysteresis loop with the coercivities smaller than 1 kOe was obtained in both the Co-Pd films with a Co layer (less than 10 A(ring)) thinner than a Pd layer and the Co-Pt films with a Co layer (less than 15 A(ring)) thinner than a Pt layer. Pd atoms at the interface in the Co-Pd film show the ferromagnetism with an induced magnetization of about 300 G, 0.5 μB per Pd atom.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342056
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Magnetic structure of Tb-Fe films with an artificially layered structure (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5748-5750 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic structure of Tb-Fe films with an artificially layered structure has been investigated by measuring the temperature dependence of the magnetization of the films. Ferrimagnetic coupling between Tb and Fe through the interface was explicitly observed up to about 9-A(ring) Tb and 10-A(ring) Fe layers. Films with thinner Tb and Fe layers than these thicknesses are composed of only ferrimagnetically coupled Tb-Fe regions. Films with thicker layers of Tb and Fe are composed of ferrimagnetically coupled Tb-Fe, ferromagnetic Fe, ferromagnetic Tb, and/or magnetically compensated Tb regions. The Tb-Fe films exhibit various temperature dependencies of the magnetization corresponding to these magnetic structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342246
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Co-Mo thin films with an artificially layered structure (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3476-3478 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cobalt-molybdenum (Co-Mo) thin films deposited into an alternating multilayer structure by a dc-magnetron sputtering method have a compositionally modulated structure. Films with thicker Co layers than Mo layers have an artificial superlattice hcp structure with the c-axis normal to the film plane. Films with reverse thicknesses of Co and Mo have an artifical superlattice bcc structure with the 〈110〉 axis normal to the film plane. Films are ferromagnetic with an easy magnetization direction in the film plane. The Co layers in contact with Mo layer have reduced magnetization. The paramagnetism or nonmagnetism is observed in films with a small periodicity composed of thinner Co layers than Mo layers. The small magnetization is originated from both low Curie temperature and decrease in the magnetization due to lattice deformation of Co.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340771
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Amorphous rare-earth–transition-metal thin films with an artificially layered structure (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 4287-4289 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We investigated the origin of magnetic anisotropy in rare-earth–transition-metal (RE-TM) thin films with an artificially layered structure and their magnetic and crystallographic properties. The various RE-TM films such as Gd-Fe, Tb-Fe, and Dy-Fe were deposited in an alternating multilayer structure by a multisource dc-sputtering method. We made films with an anisotropic distribution of RE and TM atoms parallel to the film plane, where the monatomic layering of RE and TM was confirmed by small angle x-ray diffraction analysis. The films were thermally stable to temperature up to 400 °C. The films composed of monatomic layer of RE and several atomic layers of TM show a large perpendicular uniaxial anisotropy and a large magnetization over a wide range of RE composition. It is concluded that the anisotropic distribution of RE-TM pairs is the most important origin of the magnetic anisotropy in amorphous RE-TM films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338447
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Magnetic properties of amorphous Tb-Fe thin films with an artificially layered structure (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 2514-2520 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An alternating terbium-iron (Tb-Fe) multilayer structure artificially made in amorphous Tb-Fe thin films gives rise to excellent magnetic properties of large perpendicular uniaxial anisotropy, large saturation magnetization, and large coercivity over a wide range of Tb composition in the films. The films are superior to amorphous Tb-Fe alloy thin films, especially when they are piled up with a monatomic layer of Tb and several atomic layers of Fe in an alternating fashion. Small-angle x-ray diffraction analysis confirmed the layering of monatomic layers of Tb and Fe, where the periodicity of the layers was found to be about 5.9 A(ring). Direct evidence for an artificially layered structure was obtained by transmission electron microscopic and Auger electron spectroscopic observations. Together with magnetic measurements of hysteresis loops and torque curves, it has been concluded that the most important origin of the large magnetic uniaxial anisotropy can be attributed to the Tb-Fe pairs aligned perpendicular to the films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336999
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Fe-Co films with an artificially layered structure (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 4462-4464 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Fe-Co films deposited in an alternating multilayer structure by a magnetron dc-sputtering method have an artificial superlattice structure with crystallographic coherence between constituent layers. The films are bcc with (110) planes parallel to the film surface. The lattice constant of films is smaller than for bulk Fe and decreases linearly to about 2.81 A(ring) with increasing Co layer thickness. The films are ferromagnetic with an easy magnetization direction in the film plane. The magnetization of multilayer films in comparison with that of Fe-Co alloy films with similar compositions is smaller for films with a thicker Fe than Co layer, and larger for films with a thinner Fe than Co layer. The large magnetization of Fe-Co films is attributed to the large magnetization of bcc-Co in comparison with that of bulk hcp Co.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344905
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Co-W films with an artificially layered structure (abstract) (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 4916-4916 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic and crystallographic properties of Co-W films, deposited in an alternating multilayer structure by a magnetron dc-sputtering method, have been investigated as a function of CO composition and Co layer thickness. Regular periodic stacking without interdiffusion of Co and W atoms is made on all films with various periodicities (5–100 A(ring)) and thickness ratios (8/1–1/4). Films with small periodicities (less than 30 A(ring)) composed of large thickness ratios have an artificial superlattice structure with crystallographic coherence between Co and W layers, where they grow epitaxially on the closest planes.1 The crystallographic structures of films are hcp with the (001) plane parallel to the film for films with a Co layer thicker than the W layer, and bcc with the (110) plane parallel to the film for films with a Co layer thinner than the W layer. Films with small periodicities composed of small thickness ratios have an artificial superstructure with periodic stacking of constituent layers of an amorphous phase. Films with large periodicities have an artificial superstructure wih periodic stacking of constituent layers of a crystalline phase. Films are ferromagnetic with an easy magnetization direction in the film plane. The magnetization of Co in Co-W films is smaller than that of bulk Co. The paramagnetism or ferromagnetism of films with an extremely small magnetization are observed in films with small periodicities, especially composed of a Co layer thinner than the W layer. The small magnetization of Co is attributed to decreases in both the magnetization and the Curie temperature of Co due to lattice deformation. Films with a bcc structure exhibit a Curie temperature of about 600 K. The magnetization of Co in films with a bcc structure seems to be larger than that in films with a hcp structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344730
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...