Cover Page April-2012-Advanced Materials Letters

Advanced Materials Letters

Volume 3, Issue 2, Pages 126-129, April 2012
About Cover


Fe Clusters As Origin Of Ferromagnetism In Hydrogenated Zn1-xFexO (x= 0.02 & 0.05) Samples

V. K. Sharma1, 2*, G.D. Varma2

1Department of Physics, University of Petroleum & Energy Studies, Dehradun 248007, India

2Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India

Adv. Mater. Lett., 2012, 3 (2), pp 126-129

DOI: 10.5185/amlett.2011.7283

Publication Date (Web): Apr 14, 2012

E-mail: vks80dph@gmail.com

Abstract

Bulk samples of Zn1-xFexO (x=0.02 and 0.05) were synthesized via solid state reaction route by sintering in air at 800o C. Some sintered samples were annealed in Ar/H2 at 800o C for ~ 5 hrs. X-ray diffraction results reveal that the basic crystal structure of the as sintered and hydrogenated (Ar/H2) samples corresponds to ZnO wurtzite structure together with some traces of ZnFe2O4 in the as sintered and Fe metal in the hydrogenated samples. The as sintered samples of both compositions show paramagnetic behaviour and after hydrogenation they exhibit ferromagnetic interactions at room temperature. Increase in the electrical conductivity has also been observed in the hydrogenated samples. The presence of small Fe clusters in the hydrogenated samples are expected to be responsible for the observed room temperature ferromagnetism.

Keywords

Annealing, magnetization, hydrogenation, ferromagnetism.

Current Issue

Cloud Medicine set to Revolutionize Doorstep Personalized Healthcare


Various surfactants for 0 – 3 dimensional nanocarbons: Separation, exfoliation and solubilization


Polypyrrole based biofunctional composite layer for bioelectrocatalytic device system


Innovative Graphene-PDMS sensors for aerospace applications 


Effect of hot drawing process and carbonization temperature in electrochemical behavior of electrospun carbon nanofibers


Chemical Reactivity and Electronical Properties of Graphene and Reduced Graphene Oxide on Different Substrates


Laser Raman micro-spectroscopy as an effective non-destructive method of detection and identification of various sp2 carbon modifications in industry and in nature


Electrochemical promotion of ammonia synthesis with proton-conducting solid oxide fuel cells


Biomimetic surfaces with hierarchical structure using microsized texture and nanosized Cu particles for superhydrophobicity


Enhancement the properties of high and low-density polyethylene membranes by radiation grafting process


Synthesis of 9-Aminoacridine and its Application as an Anode Material for Aqueous Rechargeable Lithium–ion Batteries


Facile synthesis of novel tough and highly flexible biodegradable membranes for water microfiltration


Investigating the possibility of using acetic acid in place of HF in chromium-benzenedicarboxylates (MIL-53 and MIL-101) synthesis applicable for CO2 adsorption


Previous issues

Smart Healthcare pulls up Clouds for Virtual Medicine

Selecting the correct electromagnetic inspection technology 

Influence of railway-track grinding on the track material condition and tribological behaviour

Micromechanical Fatigue Modelling of the Size Effect in Micro-Scale 316L Stainless Steel Specimens

Functionalization of Graphene and Reduced Graphene Oxide in Different Matrices

Effect of parasitic polytypes on ballistic electron transport in chemical vapor deposition grown 6H-SiC epitaxial layers

Photomemristive heterostructures based on two-dimensional crystals

Architecture - behaviour - properties relationship in Star-shaped MPA-PMMA and MPA-PS hyper-branched copolymers

Graphene and doped graphene: A comparative DFT study

Ag2CO3 / Magnetic reduced graphene oxide nanocomposite as advanced visible light photocatalytic hybrid materials for efficient degradation of azo dye

Optimization of acid hydrolysis process for the preparation cellulose nanofibrils

Alginate/k-carrageenan and alginate/gelatin composite hydrogel beads for controlled drug release of curcumin

Study of microstructure and mechanical properties of friction stir welded ferrite-martensite DP700 steel

Upcoming Congress

Knowledge Experience at Sea TM