Research & Reviews: Journal of Physics

(RRJoPHY) Jan - April 2014

ISSN 2347-9973

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(ISSN: 2347-9973)

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ahniman

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I take the privilege to present the hard copy compilation for the [Volume 3 Issue (1)] of Research &

Reviews: Journal of Physics (RRJoPHY). The intension of RRJoPHY is to create an atmosphere that

stimulates creativeness, research and growth in the area of Physics.

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I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.

Dr. Archana Mehrotra

Director

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Director's Desk

STM JOURNALS

1. Field Dependence of Third Order Perturbed Energy of Cobalt Ferrite Thick Films P. Samarasekara 1

2. Optical Properties of SiO Nanoparticles Doped PEO-LiClO Nanocomposite Polymer Electrolyte Films 2 4

S. U. Patil, S. S. Yawale, S. P. Yawale 8

3. Spectral Analysis and Estimation of Depths to Magnetic Rocks below the Katsina Area, Northern Nigerian Basement Complex S. B. Muhammad, E. E. Udensi, M. Momoh, Y. A. Sanusi, T. Suleiman, O. Ajana 13

4. Structural Properties and DC Conductivity Study of Barium Hexaferrite Powder Reshma Nandotaria, Atashi Ajmera, Rajshree Jotania 24

ContentsResearch & Reviews : Journal of Physics

RRJoPHY(2014© STM Journals 2014. All Rights Reserved

Research & Reviews: Journal of Physics ISSN: 2347-9973

Volume 3, Issue 1

www.stmjournals.com

Field Dependence of Third Order Perturbed Energy

of Cobalt Ferrite Thick Films

P. Samarasekara* Department of Physics, University of Peradeniya, Peradeniya, Sri Lanka

Abstract Third order perturbed classical Heisenberg Hamiltonian was modified to describe the variation of magnetic properties and easy axis orientation of cobalt ferrite films with

applied magnetic field and number of layers of the film. According to our theoretical

studies explained in this manuscript, the magnetically easy and hard directions of cobalt ferrite films solely depend on in plane and out of plane magnetic fields. According to 3-D

and 2-D plots, there are many easy and hard directions at one particular value of in plane or out of plane magnetic field. The magnetic properties were investigated for

cobalt ferrite films with thickness up to 10,000 unit cells. The total magnetic energy was

calculated for a unit spin of cobalt.

Keywords: Heisenberg hamiltonian, Cobalt ferrite, Perturbation

RRJoPHY(2014)© STM Journals 2014. All Rights Reserved

Research & Reviews: Journal of Physics ISSN: 2347-9973

Volume 3, Issue 1

www.stmjournals.com

Optical Properties of SiO2 Nanoparticles Doped PEO-

LiClO4 Nanocomposite Polymer Electrolyte Films

S. U. Patil1*, S. S. Yawale

2 and S. P. Yawale

3

1Department of Applied Physics, Govt. College of Engineering, Chandrapur, India

2Pre Indian Administrative Services Training Institute, Nagpur, India

3Department of Physics, Govt. Vidarbha Institute of Science and Humanities, Amravati, India

Abstract The optical transmission and absorption spectra were recorded in the wavelength range

200-800 nm for optimized high conducting concentrations of SiO2 nanoparticles in PEO-

LiClO4 -m wt% SiO2 polymer matrix. Values of absorption coefficient, direct band gap energy, measure of extent of band trailing or Urbach energy, absorption edge and

constant, B, have been investigated by optical characterization method. Effect of

concentration of SiO2 nanoparticles in the polymer matrix on these parameters has been discussed. It has been observed that addition of SiO2 nanoparticles increases structural

disorder and fluctuations of the internal fields associated with it. Small change in the

concentration of SiO2 nanoparticles changes optical properties of nanocomposite polymer matrix. It was also found that direct band gap fits in the lower energy region of

fundamental absorption edge.

Keywords: Absorption coefficient, optical energy gap, optical properties, absorption

edge, Urbach energy, bang trailing, nanocomposite polymer matrix

RRJoPHY(2014)© STM Journals 2014. All Rights Reserved

Research & Reviews: Journal of Physics ISSN: 2347-9973

Volume 3, Issue 1

www.stmjournals.com

Spectral Analysis and Estimation of Depths to Magnetic

Rocks below the Katsina Area, Northern Nigerian

Basement Complex

S. B. Muhammad1*, E. E. Udensi

2, M. Momoh

1, Y. A. Sanusi

1, T. Suleiman

3 and O. Ajana

1

1Department of Physics, Usmanu Danfodiyo University, Sokoto

2Department of Physics, Federal University of Techonology, Minna

Abstract Airborne magnetic data over the Katsina area of the Northern Nigerian Basement

Complex were analyzed and interpreted in this study. The study area covers parts of the

Northern Nigerian Basement Complex, bounded by longitudes 7000’

and 8

0 30’; and

latitudes 12030’ and 13

030’. Regional-Residual Separation was carried out using Least

Square Method. The resulting regional map revealed a regional trend in the NE-SW

direction. The magnetic residual values ranged from -329.74 nT to 202.91 nT. Method of spectral analysis was applied to the residual data. The result revealed two distinct layers.

The first layer which occupies the high frequency tail is due to the effects of shallower ensembles of magnetic sources and noise in the data. The first layer depth ranges from

0.04 km to 0.74 km. The second layer is associated with the intermediate frequencies and

lies between the depths of 0.1 km and 0.80 km. The lowest depth of 0.1 km occurred.

Keywords: Spectral analysis, katsina area, basement complex

RRJoPHY(2014) © STM Journals 2014. All Rights Reserved

Research & Reviews: Journal of Physics ISSN: 2347-9973

Volume 3, Issue 1

www.stmjournals.com

Structural Properties and DC Conductivity Study of

Barium Hexaferrite Powder

Reshma Nandotaria1, Atashi Ajmera

2, Rajshree Jotania

3*

Department of Physics, University School of Sciences, Gujarat University, Ahmedabad, India

Abstract M-type barium hexaferrite powder with chemical composition BaFe12O19 has been

synthesized using Co-precipitation method. High purity Nitrates, Oxides and Carbonates of Iron (III), Barium (II) and Ammonium Hydroxide were used as starting materials. The

prepared precursors calcined at temperature 950 °C for 4 h in a furnace and

characterized by FTIR, SEM, XRD, TGA and DC conductivity measurements. Microstructure of prepared samples was observed via SEM. X-ray diffraction studies

confirm the presence of a single phase with the theoretical space group P63/mmc barium hexaferrite (BaM), which crystallizes in the hexagonal system and has a uniaxial

magnetoplumbite structure, displays good chemical stability and structural properties.

Keywords: Barium hexaferrite, XRD, SEM, TGA