Fine tuning of ferromagnet/antiferromagnet interface magnetic anisotropy for field-free switching of antiferromagnetic spins

Abstract

We show that in a uniform thickness NiO(111)/Fe(110) epitaxial bilayer system, at given temperature near 300 K, two magnetic states with orthogonal spin orientations can be stabilized in antiferromagnetic NiO.

Readout of an antiferromagnetic spintronics system by strong exchange coupling of Mn2Au and Permalloy

“…The coupling of the magnetization vector M F of the FM and of N results in the perfect imprinting of the AFM domain pattern of the Mn 2 Au film on the FM domain pattern of the soft Py layer. Similar imprinting was only reported for insulating AFM/ metallic FM bilayers such as 1.2 nm of Co on 40 nm of LaFeO 3 27 or Fe(5 nm) on NiO (15 nm) 28 . However, in these cases, it was associated with a coercive field of only ≃100 Oe.…”

SOLARIS National Synchrotron Radiation Centre in Krakow, Poland

“…The direction of the incoming X-rays is parallel to the sample normal and its linear polarization is parallel either to the Fe [1][2][3][4][5][6][7][8][9][10] or to Fe[001] in-plane direction including material science, surface physics, magnetism, and biological systems. The most successful projects were focused on charge storage materials related to Li-or Na-based batteries [6], superconductors [7], and magnetism of the multilayer systems [8][9][10][11][12][13]. In Fig.…”

“…For NiO/Fe bilayers, the AFM spins are rotatable and always follow the reorientation of Fe magnetization, which can be controlled by an external magnetic field or via the temperature and thickness-driven spin reorientation transition of Fe(110). In a NiO(111)/Fe(110) system of uniform thickness, two magnetic states with orthogonal spin orientations can be stabilized in NiO AFM and field-free, reversible switching between these two AFM states was demonstrated [10,11]. The URANOS beamline (Ultra Resolved ANgular phOtoelectron Spectroscopy beamline) is dedicated to material sciences and enables measurements in the energy range from 8 to 170 eV for ARPES measurements and up to 500 eV for XPS measurements.…”

Tunable magnetic anisotropy of antiferromagnetic NiO in (Fe)/NiO/MgO/Cr/MgO(001) epitaxial multilayers

“…magnetic, optical, electrical and strain manipulation 6 . Magnetic methods include the application of relatively large external magnetic fields to align magnetic moments of AFMs 7 , 8 and indirect control of the AFM spin structure via interfacial exchange coupling with a ferromagnet (FM) in FM/AFM bilayer systems, where a relatively small magnetic field is needed 9 – 13 .…”