A5086048236- Magnetic properties of thin films
- ZnO doping and properties
- Magnetic Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Copper-based nanomaterials and applications
- Magnetic Field Sensors Techniques
- Electronic and Structural Properties of Oxides
- Magnetic Properties and Synthesis of Ferrites
- Multiferroics and related materials
- Theoretical and Computational Physics
- Magneto-Optical Properties and Applications
- Advanced Memory and Neural Computing
- Advanced Sensor and Energy Harvesting Materials
- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Characterization and Applications of Magnetic Nanoparticles
- Ion-surface interactions and analysis
- Advanced Welding Techniques Analysis
- Magnetic Properties of Alloys
- Heusler alloys: electronic and magnetic properties
- Optical Coatings and Gratings
- Quantum and electron transport phenomena
- Surface Modification and Superhydrophobicity
- Laser-induced spectroscopy and plasma
- Copper Interconnects and Reliability
Gebze Technical University
2011-2022
Boğaziçi University
2021
Ruhr University Bochum
2005-2009
Superhydrophobic (SH) polylactic acid (PLA) surfaces were previously produced by various methods and used especially in biomedical applications oil/water separation processes after 2008. However, the wettability of SH-PLA patterns containing micropillars has not been investigated before. In this study, PLA having regular microstructured pillars with 12 different pillar diameters pillar-to-pillar distances prepared hot pressing pre-flattened sheets onto preformed polydimethylsiloxane (PDMS)...
We report on structural, magnetic and electronic properties of Co-implanted TiO2 rutile single crystals for different implantation doses. Strong ferromagnetism at room temperature above is observed in plates after cobalt ion implantation, with parameters depending the dose. While structural data indicate presence metallic clusters, multiplet structure Co L3 edge XAS spectra gives clear evidence a substitutional 2+ state. The detailed analysis indicates that there are two phases plates. One...
We have studied the structural, magnetic, and electronic properties of Co-implanted ZnO(0001) films grown on Al2O3 (112¯0) substrates for different implantation doses over a wide temperature range. Strong room ferromagnetism is observed with magnetic parameters depending cobalt dose. A detailed analysis structural indicates that there are two phases in ZnO films. One ferromagnetic phase due to formation long range ordering between implanted ions layer second one superparamagnetic phase,...
The benefits conferred by the thermal stability, very low detection limit, and high sensitivity of planar Hall effect (PHE) sensors have supported up-to-date diversity applications like nT magnetometer, current sensing, or magnetic moments in lab-on-a-chip devices. Herein, we demonstrate this review implications linked to sensors, initiating from backbone PHE its evolution throughout recent few decades. Key parameters affecting sensors' performance such as noise different sources,...
We report on the structural and magnetic properties of a cobalt-implanted ZnO film grown sapphire substrate. X-ray diffraction transmission electron microscopy reveal presence ( )-oriented hexagonal Co phase in Al2O3 substrate, but not film. clusters, with diameter about 5–6 nm, form rich layer substrate close to ZnO/Al2O3 interface. Magnetization measurements indicate that there exist two different phases implanted region. One originates from clusters Al2O3, other one belongs homogeneous...
In this study, the exchange bias properties of four polycrystalline multilayer stack samples antiferromagnetic (AF) CoO and ferromagnetic (FM) Co in form [CoO/Co]n with n = 1, 2, 3, 5 are reported. The were grown on top Si (001) substrates by using magnetron sputtering method. X-ray photoelectron spectroscopy (XPS) transmission electron microscopy (TEM) used to determine structural samples. XPS measurements cobalt oxide layer revealed coexistence different phases as Co3O4, latter which...
Magnetic anisotropy of cobalt implanted single-crystalline rutile has been studied by means magneto-optical Kerr effect (MOKE) and superconducting quantum interference device (SQUID) techniques. We observed for the first time strong angular dependence remanent magnetization coercive field in plane surface: twofold (100)-substrate fourfold (001)-substrate samples. The observation opens up new possibilities to tailor magnetic anisotropies material. Possible origins ferromagnetism dielectric...
Of central interest in the research of dilute magnetic semiconductors is coupling mechanism leading to a ferromagnetic ground state. Using x-ray resonant scattering, we have analyzed element specific hysteresis curves Co, Ti, and oxygen Co-doped TiO2 synthesized by ion implantation. Magnetic dichroism was observed at Co L2,3 edges, as well O K edge, indicative spin polarization atoms host matrix. The hysteretic shapes coercive field values measured L3 edges are identical (1.9kOe 30K).
A shapeable planar Hall sensor has been fabricated by lift-off a bilayer structure of NiFe(10 nm)/IrMn (8 nm) grown on Kapton/PDMS substrate without using buffer layer. The exhibits magnetic field sensitivity 0.74 $\mu$V/Oe.mA and provides stable response under repetitive ON/OFF experiments. concave convex bending measurements indicate that the AMR voltage is very sensitive to stress strain. However, independent from them with linear region unchanged peak positions in axis. This type...
Magnetic anisotropies of Co-implanted ZnO (0001) films grown on single-crystalline Al2O3 (112¯0) substrates have been studied by ferromagnetic resonance (FMR) technique for different cobalt implantation doses. The FMR data show that the easy and hard axes a periodicity 60° in film plane, agreement with hexagonal structure films. This six-fold in-plane magnetic anisotropy, which is observed first time ZnO-based diluted semiconductors, attributed to substitution Zn sites structure, clear...
Barium hexaferrite samples were prepared by mechanical alloying using the stoichiometric amounts of BaCO3 and Fe2O3 precursors followed heat treatment applied in temperature range 7001150 • C. It was found that high energy ball mill with a milling rate enabled to obtain powders ner particles at reduced time initial linked formation barium phase.The exothermic reaction peaks corresponding BaFe12O19 phase shift from 928 C 793 for increased up 6 h.This resulted improved magnetic properties Ms...