Growth and magnetic order of Mn films onFe(001)−p(1×1)Ostudied by spin-polarized scanning tunneling

Self-organized nano-structuring of CoO islands on Fe(001)

“…The Co growth was performed at RT by means of MBE through an e-beam evaporator in UHV (base pressure in the 10 −9 Pa range), then the sample was heated at 470 K for about 5 minutes. As in other similar cases [32,[37][38][39][40], the oxygen segregates to the sample surface and this procedure results in a Co(001)-p(1 × 1)O surface, as testified by Low-Energy Electron Diffraction (LEED) and STM [36]. Cobalt oxide is then grown at 470 K by reactive deposition of metallic Co in a pure O 2 atmosphere, with partial pressure p O 2 = 1 · 10 −4 Pa, with thicknesses up to about 32 ML (1 ML of CoO is nominally equal to 0.213 nm).…”

Layered antiferromagnetic spin structures of expanded face-centered-tetragonal Mn(001) as an origin of exchange bias coupling to the magnetic Co layer

“…However, in order to experimentally verify the proposed c(2 × 2) compensated-spin structure of e-fct Mn(001), the direct, advanced spin-mapping technique of spin-polarized scanning-tunneling microscopy (SP-STM) [14][15][16][17] is required. 11 In contrast to the previous studies on body-centeredtetragonal (bct) Mn/Fe(001), [17][18][19] the e-fct-Mn/Co/Cu(001) system represents the important coercivity enhancement and prominent exchange-bias behavior due to interfacial coupling in the traditional AFM/FM ultrathin films, which is not observed in the bct-Mn/Fe(001) system. In order to answer the open question on the surface-spin structures of a few monolayers of e-fct Mn coupled to Co/Cu(001) and also have a general understanding of the physical origin of the exchange-bias field, a comprehensive study providing information on the connection to microscopic exchange-bias coupling and macroscopic magnetic behavior is significantly essential.…”

Elementary Excitations at Magnetic Surfaces and Their Spin Dependence

“…We demonstrate that the spin degree of freedom of the incoming beam can be used for clarifying the nature of different types of excitations observed at the surface despite the fact that phonons show a significant spin dependence in the scattering of electrons. As an example we show the results of a high quality oxygen passivated Fe(100) surface [4,5] [see Fig. 1(a)].…”