Library

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
    Thermodynamic Study of Annealing Process of Si-Implanted GaAs (1991)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 65-66 (Jan. 1991), p. 421-426 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/20/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.65-66.421.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Two spin-freezing behavior in concentrated amorphous ferrite oxides : 35th annual conference on magnetism and magnetic materials San Diego, California (USA) 29 Oct − 1 Nov 1990 (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5072-5074 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Amorphous CoFe2O4 with metal ions coordinated in a manner similar to the spinal crystal was prepared by the ion-beam sputter deposition method. The study of magnetic properties was carried out by dc- and ac-susceptibility measurements and Mössbauer spectroscopy. The strong spin-freezing behavior was observed in 80-Hz, 1-Oe ac susceptibility at two spin-freezing temperatures: 284 K (Tf1), which is considered to be caused by a random anisotropy of Co ions coordinated in distorted octahedral sites, and 86 K (Tf2), which might be caused by the frustration of antiferromagnetic interactions due to the amorphous structure. The dc susceptibility showed irreversibility below Tf1 which decreased with increasing applied field. However, a distinct change was not observed at Tf2. The Mössbauer spectrum revealed that some of the paramagnetic Fe ions were frozen below Tf1, with relaxation phenomena, and that the residual paramagnetic ions were frozen at Tf2. The time decay of the thermoremanent magnetization observed below Tf1 showed different behavior compared to that above and below Tf2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348126
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Acceleration of desipramine-induced changes on the dopamine receptor-coupled adenylate cyclase system by pertussis toxin (1994)
    Springer
    Journal of neural transmission 98 (1994), S. 133-142 
    Details
    ISSN: 1435-1463
    Keywords: Striatum ; dopamine receptor ; desipramine ; adaptive change ; pertussis toxin ; ADP-ribosylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The response of adenylate cyclase to GTP and to dopamine (DA) was investigated in striatal membranes from desipramine (DMI)-treated rats (10mg/kg, b.i.d., for 5 days). GPT exerted the same biphasic effect on basal and DA-stimulated enzyme activity in membranes from DMI-treated rats as on saline-treated rats. Rats were injected intraventricularly once with islet activating protein (IAP), pertussis toxin, and given extended treatment with DMI in order to study the effects on the inhibitory GTP-binding protein (Gi). Gi loses its function as a signal transducer on being ADP-ribosylated selectively by the IAP. D2 inhibition of adenylate cyclase by DA was attenuated by the IAP treatment in both DMI- and saline-treated rats; peak levels of DA plus GTP stimulation shifted from 1 μM to 100 μM GTP. D1 stimulation of adenylate cyclase by DA was also attenuated by the IAP in the DMI-treated rats. Since long-term treatment with DMI (15mg/kg, once a day, for 3 weeks) resulted in suppression of D1 stimulation similar to that seen in the present findings, uncoupling between D2 receptors and Gi due to IAP treatment might accelerate DMI-induced adaptive changes of dual control of adenylate cyclase system by DA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01277016
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Dynamics of phase-separated fluids under external fields (1994)
    Springer
    International journal of thermophysics 15 (1994), S. 1135-1143 
    Details
    ISSN: 1572-9567
    Keywords: binary fluid ; dielectric constant ; domain rheology ; electric field ; normal stress difference ; phase separation ; shear flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Phase separation in external fields has attracted much attention recently. The reason is twofold. Since kinetics of phase separation and morphology of growing domains can be controlled by external fields, it is of technological importance. The other is that existence of mesoscale domains causes curious dynamical properties in fields, which provides us with a fundamental statistical dynamic problem. One example is a phase separation of binary fluids under shear flow. Phase-separated domains are deformed under the field, which causes burst, fusion, and reconnection of domains so that extra energy dissipation occurs in these processes. Because of this large deformation of domains, the system exhibits quite unusual rheological behavior. The kinetics of phase separation of binary fluids is also influenced by an external electric field when the new phases have different dielectric constants. Deformation and interaction of domains in an electric field are investigated by means of an interfacial approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01458822
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Studies on spin-glass freezing and antiferromagnetic long-range order in an Ising spin-glass system Fe x Mn1−x TiO3 (1990)
    Springer
    Hyperfine interactions 54 (1990), S. 567-570 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A Mössbauer time window has been positively used for studying the behavior of spins in Fe x Mn1−x TiO3 withx=0.50, 0.60 and 0.65 which are of typical Ising spin-glass systems. Spin dynamics aboveT SG andT N (RSG) (definition is given in the text) are discussed. In the RSG samples, the existence of contributions of the transverse spin component to the hyperfine fields is pointed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396091
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Mössbauer study on Fe-sitting site and origin of magnetic order in YBa2(Cu0.95Fe0.05)3O7−δ (1990)
    Springer
    Hyperfine interactions 55 (1990), S. 1393-1397 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fe-sitting sites and the origin of magnetic order in YBa2(Cu0.95Fe0.05)3O7−δ have been studied by comparing the Mössbauer spectra observed before and after heat-treatments at 300°C in vacuum. Both of the major quadrupole doublets D-1 and D-2 are assigned to originate from Fe’s replacing Cu1’s. It is also suggested that fluctuations of Cu2 spins play an important role for inducing the magnetic order.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397176
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Cluster phase transition in insulating spin glass Fe2TiO5 (1990)
    Springer
    Hyperfine interactions 54 (1990), S. 717-722 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mössbauer measurements, in conjunction with magnetisation and susceptibility studies, show that in Fe2TiO5, and other insulating spin glasses, spin freezing occurs via cluster formation where spin glass phase diagram transitions occur not for individual spins but for groups of correlated spins (clusters) whose effective spins' longitudinal and transverse (or vice versa) components successively freeze.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396118
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Magnetic states of Cu1 sublattice in YBa2Cu3Oy high Tc compounds at different oxygen content (1994)
    Springer
    Hyperfine interactions 93 (1994), S. 1677-1682 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Magnetic states of Cu1 sublattice in YBa2Cu3O y : 1%57Fe compounds with 6.09 ≤y≤6.98 were investigated by57Fe Mössbauer spectroscopy at 1.68≤T≤300 K. It has been found that, upon reducingy, the magnetic transition temperatureT ml changes from 3.3 to 12 K aroundy≃6.4 where the superconductivity disappears. The magnetic phase diagram for the Cu1 sublattice is plotted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02072927
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    μ+SR study of Ising spin-glass Fe0.5Mn0.5TiO3 (1994)
    Springer
    Hyperfine interactions 84 (1994), S. 105-108 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A typical Ising spin-glass Fe0.5Mn0.5TiO3 has been investigated by μ+ spin relaxation measurements. It is found that the local magnetic fields at the μ+ stopping sites appear at a temperature twice as high asT SG. The directional distribution of the local magnetic fields is nearly isotropic, indicating the existence of the transverse spin components. It is clearly demonstrated that the spins fluctuate belowT SG and even at ∼4 K. Taking into account the results obtained by other methods, the main part of the fluctuations is inferred to be due to the transverse spin components and the fluctuation limes at ∼4 K are driven into a range between ∼10−5 and ∼10−7 s.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02060648
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Mössbauer study of paramagnetic-like behavior below the Néel temperature in a random mixture Fe x Mn1−x TiO3 withx〈0.3 (1994)
    Springer
    Hyperfine interactions 84 (1994), S. 183-186 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract As a part of studies of the microscopic behavior of spins in a mixed compound with competing exchange interactions Fe x Mn1−x TiO3, the Mössbauer technique has been applied to the samples withx=0.05, 0.10 and 0.20 which establish the antiferromagnetic long-range order at the respectiveT N's and do not show reentrant transitions at lower temperatures. We have found that in each of the three samples, the paramagnetic doublet superimposes on the magnetically split spectrum belowT N. The peak intensity of the paramagnetic doublet decreases with decreasing temperature and the paramagnetic doublet becomes undetected as sharp peaks at a temperature aroundT N/2. However, the spectra observed at temperatures lower thanT N/2 suggest that the paramagnetic doublet still exists, though it is highly broadened. This is interpreted as that short-range clusters of spins fluctuating rather slowly with time coexist with the spins forming the antiferromagnetic long-range order. We consider that these short-range clusters are responsible for the existence of the paramagnetic component contributing to the magnetization versus temperature curve.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02060661
    Library Location Call Number Volume/Issue/Year 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...