The dynamics of ultrafast demagnetisation in 3$d$ magnets is complicated by the presence both spin ${\v S}$ and orbital L}$ angular momentum, with microscopic mechanism which magnetic moment redistributed to lattice, at what time scales, yet be resolved. Employing state-of-the-art dependent density function theory we disentangle these two momenta. Utilising ultra short (5~fs) pulses that separa...

We show that a ferromagnetic (F) slab with the in-plane magnetization sandwiched between two superconducting (S) films experiences strong demagnetization effect due to Meissner screening of stray magnetic field by superconductors. In extreme case transition S from normal state can switch factor 0 1 which is in sharp contrast S/F bilayers where such affects inside F film only slightly. The giant...

Pump-probe experiments and polarizing microscopy are applied to examine temperature and heat flow in metallic magnetic superlattices on glass substrates. A model of heat diffusion in thin layers for cylindrical symmetry, equivalent to the Green’s function method, gives a good description of the results. The frequency dependence of temperature modulation shows that a glass layer should be added ...

We significantly reduce the critical current Ic0 for the onset of spin torque switching of the free layer in nanometer-scale in-plane magnetized spin valves by partially canceling its demagnetization field (Hd) through the utilization of Co/Ni multilayer free layers. A zero-thermal-fluctuation critical current density Jc0 ~ 2 × 106 A/cm2 is determined through both current ramp rate and nanoseco...

Rights: © 2005 American Physical Society (APS). This is the accepted version of the following article: Alava, Mikko J. & Basso, Vittorio & Colaiori, Francesca & Dante, Lorenzo & Durin, Gianfranco & Magni, Alessandro & Zapperi, Stefano. 2005. Ground-state optimization and hysteretic demagnetization: The random-field Ising model. Physical Review B. Volume 71, Issue 6. 064423/1-12. ISSN 1550-235X ...