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In this paper the ferromagnetic properties of Co-doped SnO2 system under room temperature conditions are investigated using X-ray diffraction and vibrating sample magnetometers. The effects of substrates on the magnetic properties of doped films are also studied.
Here we studied the two systems Fe/GaAs(100) and the closely related Fe/InAs(100)to determine the Fe magnetic moment as a function of thickness.Ultra-thin (0.4 -23 nm) Fe layers were epitaxially grown at RT in a UHV MBE chamber on GaAs(100) and InAs(100) substrates.The structural characterisation was performed ex-situ by high-resolution X-ray diffraction and reflectometry (XRR).Magnetic characterisation...
Thick NdFeB films have been prepared by triode sputtering with a deposition rate of 20 mum/hour. Films were deposited on either "cool" substrates or onto substrates heated in the range 300-500degC and then annealed at 750degC for 10 minutes. Magnetic characterisation was carried out at room temperature with an extraction magnetometer in fields of up to 10 T. Microstructures were observed...
In this work, magnetic properties and structure of granular type tilted media of (FePt-Fe3Pt )/MgO are investigated. The reason for choosing Fe3Pt is because the ordered Fe3Pt alloy thin films are found to exhibit large magnetic anisotropy (Kl and K2 are -4x106 erg/cc and 2x107 erg/cc) at room temperature, respectively, and thus a composite grain of FePt and Fe3Pt is expected to tilt the easy axis,...
Magnetite (Fe3O4) films were grown directly on thin layers of two organic semiconductors (p-conjugated oligomers), 8-hydroxyquinoline aluminium (Alq3) and sexitiophene (T6) by pulsed electron beam deposition, also called channel spark ablation (CSA), for which spin injection effects have been demonstrated at low and room temperatures. The room temperature ferromagnetism for both kind of films found...
In this work, the effects of post-annealing of CoCrPt-SiO2/Ru perpendicular magnetic recording media on magnetic properties and microstructure have been studied. CoCrPt-SiO2/Ru/Ta thin films were deposited on Si substrate by a dc magnetron sputtering method at room temperature and followed by post-annealing for 30 minutes in the range of 100 ~ 240degC. Magnetic properties such as magnetization, coercivity...
In this report, we will demonstrate that by simply using a bilayer capping layer of Ru/Ta instead of usually used Ta, the switching field, as well as distribution of switching fields, of magnetic tunnel junctions (MTJ) can be considerably reduced. Two samples with the same MTJ stack of Ta/PtMn/SAF-pinned/AlOx/CoFeB(2 nm) (bottom to top) but capped by different metal layers of Ta and Ru/Ta, correspondingly,...
CoFeB layer with amorphous structure has attracted much attention due to its soft magnetic properties and the realization of large tunnel magnetoresistance (TMR) ratio at room temperature when used as the free layer in ferromagnet/insulator/ferromagnet magnetic tunnel junctions. Two types of multilayer films were prepared in this study. Type I is a full stack of MTJs to evaluate the transport properties,...
This study presents the structural, magnetic and transport properties of a series of Ni81Fe19-Al2O3 granular multilayer films. The multilayers were prepared by sequential deposition of Ni81Fe19 (Permalloy, Py) and Al2O3 on thermally oxidized Si(001) substrates by DC and RF sputtering, respectively. The thickness t of the Al2O3 layers was kept constant at 16 , while the nominal thickness of the Py...
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