Introduction

1. 2 9 5 12 7 11 3 4 1 6 10 2 8 Magnetic Characterization of Plasma Arc Evaporated Fe Nanoparticles O. Tozkoparan1, O. Yıldırım1, E. Yuzuak1, D.Terin2, S.Venig2, S. Akturk3, E. Duman2, I. Dincer2, Y. Elerman1* 1Ankara University, Faculty of Engineering, Department of Engineering Physics, 06100 Besevler, Ankara, Turkey 2University of Saratov State, Department of Nano- and Biomedical Technology, 410012, Saratov, Russia 3MuglaUniversity, Faculty of Science, Department of Physics 48000, Kotekli, Mugla Introduction The structural and magnetic characterization of plasma arc evaporated Fe nanoparticles with different specific surface areas have been investigated by measurements of AFM, MFM, TEM, SEM, VSM. Particle sizes and shapes were observedby AFM, SEM and TEM measurements. Magneticproperties were foundby MFM measurementsandfielddependentmagnetizationmeasurementswith VSM. Experimental The Fe nanoparticles have been of great importance due to their interesting magnetic properties. Sincethe magnetic nanoparticles are being used for various applications, such as ferro-fluids, magnetic recording components, bio-medical drug delivery systems, fuel catalysts, etc. The tunable magnetic properties of iron nanoparticles with the changing of specific surface area very important advantages to improve technological applications. b) a) Topography MFM Phase 0 Oe d) c) Topography MFM Phase 0 Oe 1 – compressor, 2 – receivers, 3 – gas ramp, 4 –feeder materials, 5 –plasmareactor, 6 –gas condenser, 7 –whirle, 8 –unloading bunker, 9 –catching filter, 10, 11, 12 – packet module e) Figure 1. ArcPlasmaEvoprotionSystem Topography MFM Phase 0 Oe Fıgure 3. AFM images of samples a), c), e), MFM images of samples b), d), f) f) Conclusions: Particle size characterization are performed by TEM, SEM and AFM measurements. To eliminate agglomeration, we preparedthe samples by using ODCB (orthodichlorobenzene) for AFM and MFM measurements. ODCB preparation helpedus to see better nanoparticles for AFM and MFM measurements. From magnetic field dependent magnetization measurement, we foundHc, Ms values. The Ms values of these nanoparticlesincreasedwith decreasing average particle size at room temperature. However, we observedthe single domain structure for all nanoparticles from MFM measurements. TEM Image of sample #1 SEM Image of sample #1 a) b) SEM Image of sample #2 TEM Image of sample #2 Fıgure 4. a) MagneicFielddependentmagnetizationgraphic, b) is avaregeparticle size dependentMsgraphic References • [1]V. Singhet al. Journal of AppliedPhysics10907B506 (2011) • [2]G. Agarwalet al.SmallJournal4 270-278 (2008). • [3] A. Hendyrchet al.. Modern ResearchEducationalTopics in Microscopy. 805-811 (2007). • Correspondingauthor: elerman@ankara.edu.tr • Acknowledgement: • Wewouldliketothankto TUBİTAK forsupporting(project no: 209T054) SEM Image of sample #2 TEM Image of sample #2 Figure 2. TEM and SEM images of Nickel nanoparticles

2. Magnetic Characterization of Plasma Arc Evaporated Fe Nanoparticles O. Tozkoparan1, O. Yıldırım1, E. Yuzuak1, D.Terin2, S.Venig2, E. Duman2, I. Dincer2, Y. Elerman1* 1Ankara University, Faculty of Engineering, Department of Engineering Physics, 06100 Besevler, Ankara, Turkey 2University of Saratov State, Department of Nano- and Biomedical Technology, 410012, Saratov, Russia Introduction The structural and magnetic characterization of plasma arc evaporated Fe nanoparticles with different specific surface areas have been investigated by measurements of AFM, MFM, TEM, SEM, VSM. Particle sizes and shapes were observedby AFM, SEM and TEM measurements. Magneticproperties were foundby MFM measurementsandfielddependentmagnetizationmeasurementswith VSM The Fe nanoparticles have been of great importance due to their interesting magnetic properties. since the magnetic nanoparticles are being used for various applications, such as ferro-fluids, magnetic recording components, bio-medical drug delivery systems, fuel catalysts, etc. The tunable magnetic properties of iron nanoparticles with the changing of specific surface area very important advantages to improve technological applications.

3. 2 9 5 12 7 11 3 4 1 6 10 2 8 Magnetic Characterization of Plasma Arc Evaporated Fe Nanoparticles O. Tozkoparan1, O. Yıldırım1, E. Yuzuak1, D.Terin2, S.Venig2, E. Duman2, I. Dincer2, Y. Elerman1* 1Ankara University, Faculty of Engineering, Department of Engineering Physics, 06100 Besevler, Ankara, Turkey 2University of Saratov State, Department of Nano- and Biomedical Technology, 410012, Saratov, Russia Introduction The structural and magnetic characterization of plasma arc evaporated Fe nanoparticles with different specific surface areas have been investigated by measurements of AFM, MFM, TEM, SEM, VSM. Particle sizes and shapes were observedby AFM, SEM and TEM measurements. Magneticproperties were foundby MFM measurementsandfielddependentmagnetizationmeasurementswith VSM. Experimental The Fe nanoparticles have been of great importance due to their interesting magnetic properties. since the magnetic nanoparticles are being used for various applications, such as ferro-fluids, magnetic recording components, bio-medical drug delivery systems, fuel catalysts, etc. The tunable magnetic properties of iron nanoparticles with the changing of specific surface area very important advantages to improve technological applications. Topography MFM Phase 0 Oe Topography MFM Phase 0 Oe 1 – compressor, 2 – receivers, 3 – gas ramp, 4 –feeder materials, 5 –plasmareactor, 6 –gas condenser, 7 –whirle, 8 –unloading bunker, 9 –catching filter, 10, 11, 12 – packet module Figure 1. ArcPlasmaEvoprotionSystem MFM Phase 0 Oe Topography Figure 3. MFM measurements of sample #3 Conclusion SEM Image of sample #1 TEM Image of sample #1 SEM Image of sample #2 TEM Image of sample #2 SEM Image of sample #2 TEM Image of sample #2 Figure 2. TEM and SEM images of Nickel nanoparticles