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Spin-polarized scanning tunneling microscopy and spectroscopy (SP-STM/STS) opens up new real atomic scale magnetism. Interlayer exchange coupling of ultrathin Fe(001) films grown on the antiferromagnetically stacked bct-Mn(001) layers have been studied. The ordered c(2x2)-MnAu(001) surface alloy films were studied and found a high magnetic moment for Mn spins (>4 Bohr magneton), an antiferromagnetic...
In this paper, the antiferromagnetic (AF) NiMn exchange coupled-CoFe films exhibit excellent soft magnetic behaviors with very strong anisotropy at 90deg of the pinning direction is discussed. This led to very high ferromagnetic resonance frequency (FMR) up to 10 GHz with high permeability. These antiferromagnetic exchange coupled multilayers offer new and promising issues for magnetic microwave applications.
A systematic study of parallel and perpendicular exchange bias as well as magnetic anisotropy in [FePt/FeMn]10 multilayers is performed. The dependence of exchange bias (HE) and the unidirectional anisotropy constant (JK) on the thickness of FePt layer is investigated. The dependence of blocking temperature (TB) and exchange bias on the FeMn thickness is also investigated.
In this study, the formation of L12-Mn3Rh and L12-Mn3Ru phases were examined, in accordance with the recipe of L12-phase formation for Mn-Ir. The exchange biasing properties of the bilayers with these L12 phases were investigated.
In this study, the growth of epitaxial (001) Co50Fe50/IrMn bilayers by using the epitaxial Cu underlayers on Si substrates, instead of the previously reported MgO substrates is demonstrated using dc magnetron sputtering. The highly conductive Cu underlayers can be used as bottom leads in magnetic tunneling junctions (MTJs). In addition, the anisotropy constants and the magnetization reversal mechanism...
In this work we represent a comprehensive study of indirect exchange coupling between ferromagnetic (F) and antiferromagnetic (AF) layers carried out on NiFe(5 nm)/Cu(d)/IrMn(10 nm) thin film structure. NiFe/Cu/IrMn films were fabricated by magnetron sputtering with a seed and a capping layers of Ta(5nm). The thickness d of the Cu spacer was varied from 0.2 nm to 2 nm. The Cu spacer thickness was...
In this paper, the characteristics of the osmium (Os) in textured CoFe/IrMn magnetic film multilayer structure system is investigated and the characteristics of buffer layer and diffusion barrier is also reported. To examine the magnetic behavior, magneto-optical Kerr effect (MOKE) and vibrating sample magnetometer (VSM) are used and XRD is used to examine the crystal structure. As a result, a textured...
The authors study the effect of the interface on the coercivity Hc and the exchange field Hex in CoFe/IrMn systems by comparing the contribution of the interfacial area and the ferromagnetic layer thickness. It is shown that the exchange field only depends on the intrinsic coupling at the interface and thermal effects. By increasing activation temperature TACT, the amount of antiferromagnetic material...
In this paper, the authors examined the ferromagnetic resonance (FMR) characteristics of CoFe/PtMn/CoFe trilayer thin films to determine mechanisms behind the intermediate drop in linewidth observed, and investigate the exchange bias fields (Hex) at DC versus at X-band (9.5 GHz). Results showed that the FMR linewidth did not drop monotonically with the increase of FM thickness in the exchange coupled...
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