Control of magnetic anisotropy and magnetic patterning of perpendicular Co/Pt multilayers by laser irradiation
نویسندگان
چکیده
We report an approach to altering the magnetic properties of 111 textured Co/Pt multilayer films grown on sapphire 0001 substrates in a controlled way using single-pulse laser irradiation. The as-grown films reveal a strong perpendicular magnetic anisotropy induced by interfacial anisotropy. We show that laser irradiation can chemically mix the multilayer structure particularly at the interfaces, hence reducing the perpendicular magnetic anisotropy and coercivity in a controlled manner depending on laser fluence. As a result, perpendicular films can also be magnetically patterned into hard and soft magnetic regions using a regular two-dimensional lattice of polystyrene particles acting as an array of microlenses. © 2006 American Institute of Physics. DOI: 10.1063/1.2161811
منابع مشابه
Formation of an anisotropy lattice in Co/Pt multilayers by direct laser interference patterning
Formation of an anisotropy lattice in Co/ Pt multilayers by direct laser interference patterning" (2006). Roger Kirby Publications. 2. We report on the use of direct laser interference patterning to form an " anisotropy " lattice in Co/ Pt thin film multilayers. Co/ Pt multilayers have been extensively studied and, for the compositions studied here, are characterized by strong perpendicular mag...
متن کاملMagnetic reversal of ion beam patterned Co/Pt multilayers
The characteristics of the reversal processes of magnetic arrays fabricated by ion-irradiation of Co/Pt multilayers with perpendicular magnetic anisotropy are reported. Magnetic patterns with periodicities from 1 lm to 100 nm were patterned. A correlation between the pattern size, magnetic reversal and grain size is presented. 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rig...
متن کاملEffect of nitrogen irradiation on Co / Pd multilayers with perpendicular anisotropy
Developing new media for magnetic storage exhibiting perpendicular anisotropy, instead of the current longitudinal media, is a matter of the utmost importance [1]. The final goal is to produce a nanopatterned media able to overcome the superparamagnetic limit (information is lost due to thermal fluctuations) at room temperature. In this work, it is shown that nitrogen irradiation of thin films ...
متن کاملMagnetic properties and short-range structure analysis of granular cobalt silicon nitride multilayers
Related Articles Effects of spacer thickness on perpendicular anisotropy L10-FePt/TiN/L10-FePt pseudo spin valves J. Appl. Phys. 111, 083909 (2012) Co/Au multilayers with graded magnetic anisotropy for magnetic field sensing Appl. Phys. Lett. 100, 162402 (2012) Design and micromagnetic simulation of the L10-FePt/Fe multilayer graded film J. Appl. Phys. 111, 073910 (2012) Precession frequency an...
متن کاملTemperature and ion irradiation dependence of magnetic domains and microstructure in CoÕPt multilayers
Microstructure and magnetic properties of Co/Pt multilayers with perpendicular anisotropy were studied as a function of growth temperature (TG) and ion irradiation. With increased TG , larger columnar grain size and an improved ^111& texture were observed. Up to a critical temperature (Tcrit) , a monotonic increase in coercivity (HC) with TG was measured, followed by a decrease in HC with furth...
متن کامل