Interface magnetic anisotropy in epitaxial superlattices

Abstract

We have studied the uniaxial magnetic anisotropy of Co/Pd superlattices grown under identical conditions by molecular-beam epitaxy along the three crystal axes: [001], [110], and [111]. Our measurements unambiguously demonstrate that the large systematic variations of the anisotropy energy with crystal orientation result solely from differences in the volume contribution to the anisotropy. We find the perpendicular interface anisotropy to be independent of the epitaxial orientation (0.63 ± 0.05 erg/cm 2 ), and hence to be an intrinsic property of the Co/Pd interface.

Origin of magnetic switching field distribution in bit patterned media based on pre-patterned substrates

“…Subsequently generated inverse FFTs show the island regions with in-plane (200) lattice spacing, i.e., grains that are significantly misaligned from the FCC [111] out-of-plane crystal orientation, which is the origin of the second source of perpendicular anisotropy. 10 In agreement with Ref. 7 we identified (200) grains in every easy switcher.…”

“…Furthermore the Ta/Pd seed layers provide an outof-plane FCC [111] preferred grain crystal orientation in the Pd-rich multilayer with an x-ray rocking curve full width at half maximum of 7 -8 that creates an additional second source of perpendicular anisotropy. 10 The patterned areas are (6 Â 6) lm 2 in size and consist of a periodic array of cuboidal pillars of size (80 Â 80 Â 40) nm 3 produced by e-beam lithography using polymethyl methacrylate resist and a CrMo (20 nm) alloy etch mask. The membrane window was generated by a potassium hydroxide silicon wet etch to remove the bulk of the silicon from underneath the membrane.…”

Magnetic anisotropy in epitaxial Mn5Ge3films

“…2. The expected linear behavior 19 is directly related to the intrinsic 035211-2 magnetization of Mn 5 Ge 3 that has been determined to be M = 1200 ± 150 emu/cm 3 . This value is very close to the bulk quoted value of 1070 emu/cm 3 obtained experimentally 20 and theoretically.…”

Spin injection at remanence into III-V spin light-emitting diodes using (Co/Pt) ferromagnetic injectors

“…40) compounds, or in 3d/4d or 3d/5d superlattices as in the cases of Co/Pd (Refs. [41][42][43][44] or Co/Pt systems. 43,[45][46][47] With spin LEDs integrating out-of-plane magnetic media, Sinsarp et al 48 obtained 1.5% as a lower estimate of the helicity of the light emitted at remanence at room temperature with an FePt/MgO spin injector.…”