Magnetic coupling of surface adlayers: Gd on Fe(100)

Efficiency of ultrafast laser-induced demagnetization in GdxFe100−x−yCoMedapalli1, Razdolski2, Savoini3 et al. 2012Phys. Rev. B333265View full textAdd to dashboardCite

“…Similar experiments at room temperature have also been carried out on Gd 22 FeCo, Gd 24 FeCo, and Gd 30 FeCo samples [see Fig. 5(b)].…”

“…23 The ferrimagnetic properties of GdFeCo alloys are essentially determined by the fact that the Gd spin moments (4f and 5d) are aligned oppositely to the spin moments of Fe (3d) and Co. 24 Because of different temperature dependencies of the magnetization of the sublattices, these alloys possess a magnetization compensation temperature T M in a certain range of Gd concentrations, where the magnetizations of the two sublattices exactly compensate each other. The samples studied are thin multilayer films of AlTi (10 nm)/SiN (5 nm)/Gd x Fe 100−x−y Co y (20 nm)/SiN (60 nm), grown by magnetron sputtering on glass substrates.…”

“…The magnetic properties of GdFeCo, such as coercive field (H C ), saturation magnetization (M S ), magnetic anisotropy, and magnetization compensation temperature (T M ), and also structural properties like crystallinity or amorphousness, all depend on Gd concentration x (in percent). 25,26 Magneto-optical studies using 800-nm light showed that Gd 18 Figure 2(a) shows the hysteresis loops measured for Gd 24 Fe 66.5 Co 9.5 films at two different temperatures, 220 and 320 K. Since the magneto-optical susceptibility in the spectral range of the probe pulse (800 nm) is defined by the Fe sublattice, the reversal of the hysteresis loop indicates crossing of the compensation point T M . In Fig.…”

“…Figure 8(a) shows the dynamics of the magneto-optical Faraday rotation measured in Gd 24 FeCo at different temperatures at a pump fluence of 10.7 mJ/cm 2 . If the temperature of the sample is below the compensation point, a pump pulse of fluence 10.7 mJ/cm 2 causes 100% demagnetization of the alloy [see Fig.…”

Thermal stability of atomic Ag/Au and Au/Ag interfaces on A Ru(001) substrate

“…the magnetic moment of e.g. thin Gd films deposited on Fe is found to couple antiparallel to that of the substrate [3]. These magnetic properties together with the advantages of thin films like miniaturization and low material consumption make these structures potentially useful for magnetic storage devices.…”