Dynamic magnetic and hysteretic properties of the different type core/shell nanostructures: the effect of geometry of wire shape

In the present study, we examine by comparison the dynamic magnetic and hysteretic properties of nanostructures with different magnetic core/shell particles confined within a shape structure of the wire. The model of nanostructures with core=spin-1 and shell=spin-3/2, namely cylindrical, cubic and hexagonal nanowire, is proposed for studying the effect of the geometry of wire shape on the magnetic and hysteretic properties. The results were obtained by mean-field theory as well as Glauber-type stochastic dynamics, and focused the response to thermal and hysteretic behaviours of systems. All results display dynamic magnetic properties of the nanostructure strongly dependent on the geometry of wire shape. Moreover, temperature and crystal field are proposed as the important factors affecting the dynamic properties of wire systems

The effects of lithographic residues and humidity on graphene field effect devices

WOS: 000397003200029Recently, unknown-manner changes in charge neutrality point (CNP) positioning were ascribed to humidity at graphene field effect transistors (GFETs). While the exact means of humidity interacting with hydrophobic graphene remains unknown, this work examines pristine and lithographic-process-applied graphene surfaces with surface enhanced Raman spectra (SERS). SERS analysis shows that the lithographic-process-applied graphene does not have the same properties as those of pristine graphene. Furthermore, this study has experimentally investigated the effect of humidity on the transfer characteristics of GFET and proposed a model to explain the formation of asymmetric IDS-Vbg branches in accordance with the SERS results and humidity responses.Scientific and Technical Research Council of Turkey (TUBITAK) [108T930]We will never forget Asli SIMSEK, who was a master student at our group, and we would like to thank her for valuable contributions. We would like to thank ARGESAN for contribution in fabricating a mask aligner. This work was supported by the Scientific and Technical Research Council of Turkey (TUBITAK) under Grant no. 108T930