High frequency performance of laminated soft magnetic films (NiFe, FeAlN, and amorphous CoFeBSi) in external fields

Abstract

Magnetization reversal and magnetoresistance behavior of perpendicularly magnetized [Co/Pd]4/Au/[Co/Pd]2 nanowires J. Appl. Phys. 112, 073902 (2012) Electric-field control of CoFeB/IrMn exchange bias system J. Appl. Phys. 112, 064120 (2012) Critical effect of spin-dependent transport in a tunnel barrier on enhanced Hanle-type signals observed in threeterminal geometry Appl. Phys. Lett. 101, 132411 (2012) Giant tunneling magnetoresistance in epitaxial Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions by halfmetallicity of Co2MnSi and coherent tunneling Appl. Phys. Lett. 101, 132418 (2012) Interface mediated ferromagnetism in bulk CuO/Cu2O composites Appl.Thin film multilayers of different compositions ͑NiFe, FeAlN, and amorphous CoFeSiB͒ were prepared by sputter deposition. The ultrahigh frequency performance was studied using rf fields perpendicular to the in-plane easy axis. By applying external bias fields either along or perpendicular to the easy axis ͑perpendicular to the rf field excitation͒, the cutoff frequency of the different alloys can be shifted significantly to higher frequencies ͑Ͼ1 GHz͒ according to theory. On the other hand, it is possible from these measurements to identify different phenomenological damping of the material systems due to structural effects. Although FeAlN exhibits the highest saturation magnetization compared to NiFe and CoFeBSi, it shows a higher damping which is explained by nonideal structure.

High Frequency Soft Magnetic Performance on Magnetically Isotropic Co-Al-N Films in External Bias Field

“…4(b). A similar increase of with (perpendicular to ) in films with uniaxial magnetic anisotropy has been reported previously [6], [7].…”

Growth and magnetism of metallic thin films and multilayers by pulsed-laser deposition

“…Due to the complicated composition and structure of the amorphous magnetic materials, a congruent deposition technique has to be used. While both sputter deposition and PLD are suitable techniques, sputter deposition rarely produces thin films that fully retain the magnetic properties of commercial amorphous Fe-Co-Si-B ribbons or wires [123,124]. In contrast, PLD has shown enough versatility to allow the growth of high-quality thin films [125] of amorphous Fe-Co-Ni-Si-B on both Si and glass substrates.…”

Correlation between iron self-diffusion and thermal stability in doped iron nitride thin films

“…Among various additives Zr, Ta, Ti, and Al have been most popular. 14,15,[18][19][20][21][22][23][24][25][26][27] Although they show some degree of structural stability, only very few attempts have been made to study the magnetic stability which is deterministic for magnetic applications. Moreover, the choice of additives looks rather arbitrary.…”