Strategies to Improve Physical Properties in Eco-Friendly Materials through Cation Engineering

Bulk ferro/piezoelectric ceramics are the backbone for several components utilized in communication systems, industrial automation, medical diagnostics, information-technology, energy storage and harvesting. From the application point of view, ferro/piezoelectric materials should have high piezoelectric coefficients, high remnant polarization (Pr), low coercive field (EC), wide temperature stability and good mechanical strength [1]. In most of the high performance piezoelectric applications, the material of choice is ultimately based upon lead based materials such as PZT (i.e., Pb(Zr, Ti)O3). Even though PZT has excellent piezoelectric properties suitable for device applications, the prime concern is about lead (Pb) which is highly toxic and hazardous in nature. Hence, it has become a serious threat for environmental protection during the waste disposal and also it indirectly induces health related issues. In this regard, worldwide environmental considerations are demanding the elimination of lead-based materials from all consumer items [2]

Strategies to Improve Physical Properties in Eco-Friendly Materials through Cation Engineering

Bulk ferro/piezoelectric ceramics are the backbone for several components utilized in communication systems, industrial automation, medical diagnostics, information-technology, energy storage and harvesting. From the application point of view, ferro/piezoelectric materials should have high piezoelectric coefficients, high remnant polarization (Pr), low coercive field (EC), wide temperature stability and good mechanical strength [1]. In most of the high performance piezoelectric applications, the material of choice is ultimately based upon lead based materials such as PZT (i.e., Pb(Zr, Ti)O3). Even though PZT has excellent piezoelectric properties suitable for device applications, the prime concern is about lead (Pb) which is highly toxic and hazardous in nature. Hence, it has become a serious threat for environmental protection during the waste disposal and also it indirectly induces health related issues. In this regard, worldwide environmental considerations are demanding the elimination of lead-based materials from all consumer items [2]

IIT Hyderabad working on tech to detect early malfunctioning implants

Researchers at Indian Institute of Technology, Hyderabad are developing new technologies for bio-compatible implants that will enable early detection of malfunctions through non-invasive monitoring and diagnosi

IIT Hyderabad Researchers Developing New Eco-Friendly Technologies

Researchers at Indian Institute of Technology, Hyderabad are developing new technologies for bio-compatible implants that will enable early detection of malfunctions through non-invasive monitoring and diagnosi

IIT-Hyderabad working on early detection of malfunctioning implants

The Indian Institute of Technology Hyderabad (IIT-Hyd) is working on developing new technologies for bio-compatible implants that will enable early detection of malfunctions through non-invasive monitoring and diagnosis

IIT-Hyderabad researchers make a mark

Researchers at Indian Institute of Technology, Hyderabad are developing new technologies for bio-compatible implants that will enable early detection of malfunctions through non-invasive monitoring and diagnosi

Electrical switching to probe complex phases in a frustrated manganite

Electrical switching was used to investigate complex phases induced by Cr-substitution in (Pr1/3Sm2/3)2/3Sr 1/3MnO3. This system was expected to transform from a Type I (Mn4+/Mn3+≈3/7) to Type II (Mn4+/Mn 3+≈1) manganite at critical Cr content, satisfying a virtual Mn4+/Mn3+ ratio close to unity. The phase diagram of (Pr1/3Sm2/3)2/3Sr1/3Mn 0.8Cr0.2O3 including charge/spin ordered/disordered phases was probed by electrical switching. The ferromagnetic insulating phase at <~100 K, located next to the charge-ordered antiferromagnetic phase, exhibited a sudden rise in conductivity upon electric-field biasing. This resulted from the melting of charge ordering, and demonstrated the presence of a crossover regime of two coexisting magnetic orderings

RAIITH: Institutional Repository at IIT Hyderabad and its impact in scientific community

The digital content produced now a days is enormous and in this connection libraries role at various level is crucial. Higher educational institutions generate and make available a quantum of digital academic and scholarly content. The crossover from print to electronic databases in the libraries is playing prominent role to collect, archive, maintain and publish the content. In this context, the establishment of institutional repository is an important step towards enhancing the visibility of the educational institute across the globe. Research Archive of Indian Institute of Technology, Hyderabad (RAIITH) is built and managed by using open source software (Eprints). Also it discusses about the methods used to collect, collate and publish scholarly content in RAIITH. The challenges come across during the implementation and the testing phase were well addressed. In addition, to complement the traditional citation-based metrics, the latest metric tool viz. Altmetric is structured for its influence in the scientific community. The importance of open access model for scholarly communications has been discussed in details to improve the overall visibility of scientific and technological outcome

Investigation of structural, magnetic and optical properties of rare earth substituted bismuth ferrite

Polycrystalline BiFeO3 and rare earth substituted Bi 0.9R0.1FeO3 (BRFO, R=Y, Ho and Er) compounds were prepared by rapid solid state sintering technique. Structural phase analysis indicated that all the compounds stabilized in rhombohedral structure (R3c space group) and a small orthorhombic phase fraction was observed in BRFO compounds. From the Raman spectra results, the changes in the phonon frequencies (A1) and line widths suggested lattice distortion in the BRFO compounds as was evidenced in the XRD analysis. Compared to the linear variation of magnetization with magnetic field (M-H) shown by BFO, an obvious M-H loop was observed in BRFO compounds which could be due to the suppression of space modulated spin structure and was explained on the basis of weak ferromagnetism and field induced spin reorientation. UV-Vis spectroscopy evidenced a change in local FeO6 environment due to shift in the 6A 1g→4T2g energy transition band. BRFO compounds with improved remnant magnetization and coercive field are applicable for magnetoelectric devices