M. Ramesh Babu

Bio: M. Ramesh Babu is an academic researcher from Anna University. The author has contributed to research in topics: Irradiation & Laser therapy. The author has an hindex of 3, co-authored 8 publications receiving 72 citations. Previous affiliations of M. Ramesh Babu include University of Wyoming & Chinese Academy of Sciences.

Preparation and characterization of ZnO nanofibers by electrospinning

Abstract: Electrospun ZnO nanofibers were obtained by calcinating PVA/Zinc Acetate composite fibers at various temperatures. Atomic Force Microscopy (AFM) revealed that the ZnO fibers have diameters in the range of 100-200 nm. The fibers were characterized by FT- IR, TGA-DTA, and XRD studies. The XRD results showed that the crystal structure and the morphology of the fibers were largely dependent on the calcination temperature (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Tunneling magnetoresistance in (Ga,Mn)As/Al-O/CoFeB hybrid structures

Abstract: Tunneling magnetoresistance (TMR) in Ga(09)2Mn(008)As/Al-O/Co40Fe40B20 trilayer hybrid structure as a function of temperature from 10 to 50 K with magnetic field vertical bar H vertical bar <= 2000 Oe has been studied TMR ratio of 16% at low fields at 10 K was achieved with the applied current of 1 mu A The behavior of junction resistance was well explained by the tunneling resistance across the barrier Strong bias dependences of magnetoresistance and junction resistance were presented (C) 2009 American Institute of Physics [DOI: 101063/13068418]

Physical properties and characterization of RuSr2GdCu2O8 (Ru-1212) grown by top seeded melt textured technique

Abstract: Efforts have been made in optimizing growth conditions for bulk textured growth of RuSr 2 GdCu 2 O 8 (Ru-1212) employing top seeded growth technique (TSG). Thermal stability and peritectic temperature ( T p ) have been determined by TG–DTA analysis. The study facilitates appropriate thermal treatments to yield good quality sample. The structural study of the as grown sample has been carried out by X-ray diffraction technique. Morphological study by polarized optical microscope (PLOM) and scanning electron microscope (SEM) reveals the growth mechanism. Subsequently, the stoichiometry has been confirmed by energy dispersive X-ray analysis (EDAX). The observed characterization results show the influence of superconducting property on growth technique and allow one to correlate between the physical properties and experimental technique.

ZnO based advanced functional nanostructures: synthesis, properties and applications

Abstract: ZnO nanostructures, due to their novel properties, are promising components in a wide range of nanoscale devices for future applications. This article provides a comprehensive review of the current research activities that focus on the synthesis, characterization and applications of ZnO based nanostructures. We briefly describe the most commonly applied methodologies for the synthesis of ZnO nanostructures. A range of remarkable characteristics is then presented, organized into sections describing the optical, electrical and mechanical properties. Finally, we include a brief analysis of the possible future trends for the application of this interesting semiconductor oxide for hydrogen storage and biosensors. These studies constitute the basis for developing versatile applications of ZnO nanostructures.

Electrospinning of Fe/SiC Hybrid Fibers for Highly Efficient Microwave Absorption

Abstract: Fe/SiC hybrid fibers have been fabricated by electrospinning and subsequent high-temperature (1300 °C) pyrolysis in Ar atmosphere using polycarbosilane (PCS) and Fe3O4 precursors. It is found that the introduction of Fe has had a dramatic impact on the morphology, crystallization temperature, and microwave electromagnetic properties of the hybrid fibers. In addition, the Fe particles have acted as catalyst sites to facilitate the growth of SiCO nanowires on the surface of the hybrid fibers. As a result, the permittivity and permeability have been enhanced effectively, and the high reflection loss (RL) has been achieved at a low frequency band with a thin absorber thickness. At an optimal PCS/Fe ratio of 3:0.5, the hybrid fiber/silicone resin composite (35 wt %) with a 2.25 mm absorber thickness exhibits a minimal RL of about −46.3 dB at 6.4 GHz. The wide frequency band (4–9.6 GHz) and thin absorber thickness (1.5–3.5 mm) for effective absorption (<−20 dB) prove that the Fe/SiC hybrid fiber is a promising ...