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  • 1
    Electronic Resource
    Electronic Resource
    Strong magnetic fluctuations in transition metal oxides (invited) : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5023-5028 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Most magnets have long-range magnetic order when the thermal energy is less than the local magnetic exchange energy (T〈||aitch-thetaCW||). Effects such as reduced dimensionality and frustration, however, can suppress the ordering transition and lead to unusual cooperative paramagnetic phases at low temperatures. We review neutron scattering experiments exploring such short-range-ordered phases in insulating transition metal oxides. We discuss (V1−xCrx)2O3, in which orbital fluctuations appear to limit spin correlations to within small "molecular'' clusters, SrCr9pGa12−9pO19, in which geometrical frustration allows local anitferromagnetic constraints to be fulfilled without long-ranged order, and Y2BaNiO5, in which magnetic interactions occur only within chains of spins which are unable to order because of the Haldane effect. Emphasis is placed on the common features of exchange interactions in these oxides and the important role which magnetic neutron scattering has played in understanding the unusual magnetic phenomena. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361564
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetoresistance from quantum interference effects in ferromagnets (2000)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 404 (2000), S. 581-584 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The desire to maximize the sensitivity of read/write heads (and thus the information density) of magnetic storage devices has stimulated interest in the discovery and design of new magnetic materials exhibiting magnetoresistance. Recent discoveries include the ‘colossal’ ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35007030
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  • 3
    Electronic Resource
    Electronic Resource
    Quantum transport in ultrathin CoSi2 epitaxial films (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 452-454 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetotransport measurements have been performed in thin cobalt disilicide films epitaxially grown on Si(111) wafers. Films of thickness between 4.0 and 20.0 nm were studied in order to ascertain the important electron scattering rates. A temperature independent contribution to the phase breaking scattering rate was determined and attributed to spin–spin scattering of the conduction electrons which increases as the film thickness is decreased. The origin of this scattering and its importance to the low-temperature electron transport are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103663
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  • 4
    Electronic Resource
    Electronic Resource
    Electron heating experiments below the spin glass resistance maximum (1993)
    Springer
    Journal of low temperature physics 93 (1993), S. 7-14 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report electron heating measurements below the resistance maximum associated with the spin-glass freezing transition. The differential resistance showed features under the application of a dc electric field which cannot be readily interpreted in a simple electron heating picture. We demonstrate that these anomalies are resolved after computation of the resistance by integration of the differential results at various currents. An experiment was designed and carried out to test this procedure through the use of an applied magnetic field. The integration process is applicable to transport measurements carried out under combinations of ac and dc electric fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00682278
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