Browsing by Author "Köçkar, Hakan"
Now showing items 1-20 of 153
-
2D magnetic texture analysis of co-cu films
Bayırlı, Mehmet; Karaağaç, Öznur; Köçkar, Hakan; Alper, Mürsel (Walter De Gruyter GMBH, 2017)The magnetic textures for the produced magnetic materials are important concepts in accordance with technical applications. Therefore, the aim of this article is to determine 2D magnetic textures of electrodeposited Co-Cu ... -
Biriktirme oranı ve döner alt tabaka hızının, püskürtme metoduyla üretilen FeCrNiCd alaşım ince filmlerinin yapısal ve manyetik özellikleri üzerine etkilerinin incelenmesi
Şentürk, Özgür (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2019)Bu çalışmada, FeNiCrCd ince filmler DC magnetron püskürtme tekniği ile esnek polimer asetat alt tabaka üzerine biriktirildi. İnce filmler farklı biriktirme oranlarında (0.02, 0.04, 0.06 ve 0.08 nm/s) ve alt tabakanın farklı ... -
Change in planar hall effect ratio of Ni-Co films produced by electrodeposition
Karpuz, Ali; Köçkar, Hakan; Alper, Mürsel (Elsevier Science Bv, 2015)Ni-Co Films were produced by the electrodeposition technique and their magnetotransport properties were studied. The anisotropic magnetoresistance (AMR) and the planar Hall effect (PRE) ratios were Found using the van der ... -
Characterisation of evaporated and laser-ablated 3% silicon-iron
Köçkar, Hakan; Meydan, Turgut (Elsevier Science Bv, 2002)A novel rotating cryostat vacuum system originally designed to fabricate organic layers has been used for the first time to evaporate 3% silicon-iron magnetic materials. Results of all films deposited on glass and silicon ... -
Characterisations of cocu films electrodeposited at different cathode potentials
Karaağaç, Öznur; Alper, Mürsel; Köçkar, Hakan (Elsevier Science Bv, 2010)Structural and magnetic properties of CoCu films electrodeposited on polycrystalline Cu substrates were investigated as a function of cathode potential used for their deposition. The compositional analysis, performed by ... -
Characterisations of CoFeCu films: Influence of Fe concentration
Köçkar, Hakan; Özergin, Ercüment; Karaagaç, Öznur; Alper, Mürsel (Elsevier Science Sa,, 2014)The properties of electrodeposited CoFeCu films were studied with respect to Fe ion concentration in the electrolyte due to their interesting magnetic properties like high saturation magnetisation and low coercivity. The ... -
Characterizations of binary fecr (AISI 430) thin films deposited from a single magnetron sputtering under easy controllable deposition parameters
Köçkar, Hakan; Kaplan, Nadir; Karpuz, Ali; Kuru, Hilal; Kaya, Birol (Springer, 2019)A series of 50-nm binary FeCr martensitic thin films were sputtered from a single source made of commercial AISI 430 ferritic stainless steel under the deposition rates gradually increased from 0.03 to 0.11nm/s with 0.02nm/s ... -
Characterizations of electrodeposited nicofe ternary alloys: Influence of deposition potential
Kuru, Hilal; Köçkar, Hakan; Demirbaş, Özen; Alper, Mürsel (Springer, 2015)Microstructural, magnetoresistance and magnetic properties of electrodeposited NiCoFe ternary alloys were investigated in terms of deposition potentials changing from -1.8 to -3.0 V with respect to saturated calomel ... -
Characterizations of FeCl/Cu superlattices sputtered at low and high deposition rates of ferromagnetic layer
Karpuz, Ali; Köçkar, Hakan; Uçkun, Mehmet; Eşiyok, Mesut (Elsevier Science Bv, 2015)FeCl/Cu superlattices was grown using a dc magnetron sputtering at low (0.02 nm/s) and high (0.08 nm/s) deposition rates of ferromagnetic layer, and the properties of the superlattices were investigated. Structural ... -
Characterizations of NiCu/Cu multilayers: Dependence of nonmagnetic layer thickness
Kuru, Hilal; Köçkar, Hakan; Alper, Mürsel (Springer, 2013)A series of NiCu/Cu multilayers were grown on (110) textured polycrystalline Cu substrates from a single electrolyte under potentiostatic deposition conditions. Microstructure, magnetoresistance and magnetic properties of ... -
Co-Fe films: Effect of Fe content on their properties
Köçkar, Hakan; Alper, Mürsel; Şahin, Turgut; Haciismailoğlu, Mürside Şafak (Amer Scientific Publishers, 2010)The characterizations of Co-Fe films electrodeposited on Ti substrates under potentiostatic conditions were investigated as a function of the Fe content in the films. The compositional analysis was carried out by energy ... -
CoCu alaşım filmlerin elektrodepozisyonu, yapısal ve manyetik özellikleri üzerine depozisyon paremetrelerin etkisinin incelenmesi
Karaağaç, Öznur (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2007)Bu çalışmada, elektrodepozisyon tekniğiyle polikristal bakır (Cu) alttabaka üzerine büyütülen Co ve CoCu filmlerin kimyasal bileşimi, yapısal ve manyetik özellikleri araştırılmıştır. Filmlerin özellikleri depozisyon ... -
Comparison of Ni-Cu alloy films electrodeposited at low and high pH levels
Alper, Mürsel; Köçkar, Hakan; Şafak, Mürşide; Baykul, M. Celalettin (Elsevier Science Sa, 2008)Ni-Cu alloy films were potentiostatically electrodeposited from the electrolytes with low pH (2.0) and high pH (3.3) levels. The structural analysis of the films was carried out using the X-ray diffraction (XRD) and scanning ... -
Composition dependence of structural and magnetic properties of electrodeposited Co-Cu films
Karaağaç, Öznur; Köçkar, Hakan; Alper, Mürsel (Ieee-Inst Electrical Electronics Engineers Inc, 2010)The structural and magnetic properties of Co-Cu films were studied in terms of Co content in the films. The surface morphology of the films showed that the film with the lowest Co content (3 wt. %) had dendritic structures, ... -
Contribution of electrolyte pH and deposition potentials to the magnetic anisotropy of electrodeposited nickel films
Köçkar, Hakan; Alper, Mürsel; Karaağaç, Öznur; Nakiboğlu, Nuri; Baykul, M. Celalettin (Elsevier Science Bv, 2010)The influence of electrolyte pH and cathode potential on the magnetic properties of single layer Nickel films electrodeposited on polycrystalline titanium substrates was studied. The films were deposited at the electrolyte ... -
Dependence of magnetoresistance in electrodeposited CoNiCu/Cu multilayers on Ni composition
Hacıismailoğlu, Mürşide Şafak; Alper, Mürsel; Köçkar, Hakan (Electrochemical Soc Inc, 2010)A series of CoNiCu/Cu multilayers was potentiostatically electrodeposited on strong (100) textured Cu substrates from the electrolytes with different Ni concentrations. The x-ray diffraction (XRD) data showed that all ... -
Determination of texture orientation related magnetic properties of nickel-cobalt films
Bayırlı, Mehmet; Köçkar, Hakan; Alper, Mürsel; Çöktüren, Emrah (Verlag Z Naturforsch, 2010)The determination of texture effects in nickel-cobalt (Ni-Co) films with different thickness, which were obtained by electrodeposition, has been investigated by the measurement of hysteresis loops at different angles. ... -
Development and characterization of superparamagnetic nanomaterial to determine its potential application in removing the bitterness of table olives
Savaş, Elif; Karaağaç, Öznur; Köçkar, Hakan; Kaya, Mihrap Yaşar; Türkoğlu, Sümeyye Aydoğan; Köçkar, Feray (MYU, 2020)The aim of this study is to develop stable superparamagnetic iron oxide nanoparticles (SPIONs) for the immobilization of beta-glucosidase. The goal is to figure out the possibility of applying immobilization techniques in ... -
Development of electrodeposited multilayer coatings: A review of fabrication, microstructure, properties and applications
Aliofkhazraei, M.; Walsh, Frank C.; Zangari, Giovanni; Köçkar, Hakan; Alper, Mürsel; Rizal, Conrad; Magagnin, Luca; Protsenko, Vyacheslav (Elsevier, 2021)The demand for robust engineering materials demonstrating good tribological performance under arduous service conditions has forged the development of novel coating materials and techniques. In the field of surface ... -
Development of hydrogen reduction method for La-Fe-Si materials from oxalate precursors
Ateş, Semih; Karaağaç, Öznur; Köçkar, Hakan; Gürmen, Sebahattin (Taylor & Francis Ltd, 2023)Hydrogen reduction was used to synthesise LaFeSi-based materials from lanthanum, cerium, iron oxalates, and silicon dioxide. The process involved the pre-reduction of the precursor powder mixture at 650 & DEG;C under N-2 ...
