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Evidence of recent volcanic activity on the ultraslow-spreading Gakkel ridge (2001)

Kurras, G. J. ; Tolstoy, M. ; Bohnenstiehl, D. R. ; [et al.]

[s.l.] : Macmillian Magazines Ltd.

Nature 409 (2001), S. 808-812

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ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] Seafloor spreading is accommodated by volcanic and tectonic processes along the global mid-ocean ridge system. As spreading rate decreases the influence of volcanism also decreases, and it is unknown whether significant volcanism occurs at all at ultraslow spreading rates ...

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1038/35057258

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Exchange coupling through spin density wave Cr(001) using Fe whisker substrates (2000)

Heinrich, B. ; Cochran, J. F. ; Monchesky, T. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 87 (2000), S. 5449-5451

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Exchange coupling through spin density wave in Fe whisker/Cr/Fe(001) structures was studied by Brillouin light scattering (BLS) and longitudinal magneto-optical Kerr effect (MOKE) techniques. It will be shown that interface alloying at the Fe whisker/Cr interface profoundly affects the behavior of short wavelength oscillations. The first crossover to antiferromagnetic coupling occurs at 5 monolayers (ML), the phase of short-wavelength oscillations is reversed compared to that expected for the spin density wave in Cr(001), and the strength of coupling is significantly decreased from that obtained from first principle calculations. Using Cu and Ag atomic layers between the Cr(001) and Fe(001) films, heterogeneous interfaces showed that the exchange coupling in Cr(001) is strongly affected by electron multiple scattering. It appears that electron quantum well states in the Fe film play no important role in the strength of the exchange coupling when the Fe film is bounded on one side by Au, but they become important when the Fe film is bounded by Cr on both sides. © 2000 American Institute of Physics.