Yazar "Karaağac, Öznur" için listeleme
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A facile method to synthesize nickel ferrite nanoparticles: parameter effect
Karaağac, Öznur; Atmaca, Şüheda; Köçkar, Hakan (Springer, 2017)Nickel ferrite nanoparticles were synthesized by co-precipitation/hydrothermal synthesis. The synthesis temperature of the co-precipitation of the precursor was studied. At this stage, proper reaction temperature to ... -
Improvement of saturation magnetization of sputtered Fe/Al multilayer thin films using Taguchi Method supported by ANOVA, response surface methodology and regression analysis
Köçkar, Hakan; Kaplan, Nadir; Karpuz, Ali; Karaağac, Öznur (Polska Akademia Nauk, 2023)Taguchi method has been conducted to improve the saturation magnetisation, M-s, of Fe/Al multilayer thin films deposited using a dual-target magnetron sputtering. The M-s values were obtained from the magnetic hysteresis ... -
Martensitic ternary FeCrMn thin films sputtered from austenitic AISI 202 stainless steel target: Phase transition and corresponding magnetic properties under the influence of deposition rate
Köçkar, Hakan; Kaplan, Nadir; Karaağac, Öznur (Elsevier, 2023)The nanostructured materials exhibit quite different properties from their bulk counterparts. Therefore, in this work, phase transition from a commercial austenitic AISI 202 (Bulk FeCrMn) stainless steel to martensitic ... -
Optimisation of saturation magnetisation of iron nanoparticles synthesized by hydrogen reduction: Taguchi technique, response surface method, and multiple linear and quadratic regression analyses
Karaağac, Öznur; Köçkar, Hakan (Elsevier Science BV, 2019)In this study, Taguchi method, response surface methodology and regression analyses have been applied to assess the effects of synthesis parameters on saturation magnetisation, M-s of iron nanoparticles produced by hydrogen ... -
Properties of electrodeposited CoFeNi/Cu superlattices: The effect of CoFeNi and Cu layers thicknesses
Kalsen, Sonser; Alper, Mürsel; Köçkar, Hakan; Hacıismailoğlu, Mürşide; Karaağac, Öznur; Kuru, Hilal (Springer, 2013)CoFeNi/Cu superlattices were grown on Ti substrate by electrodeposition as a function of the ferromagnetic and non-magnetic layer thicknesses. In order to examine the effect of the Cu layer thickness on the film properties, ... -
Substrate type and their rotation speed controlled magnetic anisotropy of iron films evaporated by a newly designed vacuum coating system
Köçkar, Hakan; Karpuz, Ali; Karaağac, Öznur; Hilal,Kuru; Hacıismailoğlu, Mürşide; Mürsel,Alper (Natl Inst Optoelectronics, 2014)A newly designed Vacuum Coating System (VCS) system has been used for the first time to prepare magnetic iron thin films on plastic kapton and rigid glass substrates at different rotation speeds (0 rpm, 30 rpm, 60 rpm, and ...
