Tag Archives: IIT Roorkee

New memory device to boost miniaturization of digital gizmos 

Sunderarajan Padmanabhan

New Delhi: Scientists at Indian Institute of Technology, Roorkee, have developed a high density memory device that promises to provide high speed data reading and writing even while requiring extraordinarily low power to operate it.

The new type of memory could potentially be used in future memory chips for digital devices like smartphones and tablets, as well as for large data storage. It may also find applications in memory-intensive computing tasks like video and multi¬media signal processing, pattern recognition, virtual reality, and machine learning.

Prof. Davinder Kaur and research student Kirandeep Singh at their laboratory

In order to move towards further miniaturization of digital devices, scientists have been looking for new materials and processes including quantum mechanical phenomenon. Novel materials and material combinations are needed to fabricate what are called tunnel junctions with improved functionalities. One such potential contender is the Multiferroic Tunnel Junction (MFTJ)—a device made up of two ferromagnetic metal layers set apart by an ultrathin ferroelectric barrier. The aim is to obtain multiple logic states or precisely what is called ‘four logic levels’.

Researchers in the past have been able to achieve the four logic states, but these logic states have to be distinguishable and separable.  The team at IIT, Roorkee, has achieved this. It has developed Ferromagnetic Shape Memory Alloy (FSMA)-based MFTJ nonvolatile memory device. “Our memory device has shown tremendous improvement of near 140 per cent in the memory function,” Prof. Davinder Kaur, who has developed the device along with her research student Kirandeep Singh, told India Science Wire.

One of the key features of the device is that it shows a ‘four logic state’ resistance at room temperature that can be tuned both by electric as well as magnetic field. Further, it utilizes voltage instead of large electric current to switch the magnetic bits and write data into memory. Hence it is more energy efficient and dense and can bring down the cost per bit. The researchers have published their findings in journal Applied Physics Letters. (India Science Wire)


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Hope of a new treatment for knee pain

Jyoti Singh

New Delhi: Researchers at the Indian Institute of Technology Roorkeehave tested a new method for treating problems relating to knee joints using a novel nanomaterial, and found it effective in initial studies.

Scientists used a specific ferrite nanomaterial, embedding it with Poly vinylidene fluoride (PVDF) to make a magnetic-dielectric composite. This material, researchers say, can be used to provide thermo-regulated treatment for osteoarthritis. It is also biocompatible.

The effectiveness of the new composite has been tested using a computer model of knee patella and preliminary bio-compatibility studies have also undertaken to study its biosafety. The results of the study have been published in Journal for Materials Science – Biomaterials.
Researchers said that it may be possible to implant the nanomaterial around affected regions and then use heat therapy to ‘activate’ nanoparticles which can then keep heating the affected region. “Since polymer-based nanoparticles can be injected around knee joints, they will be able to provide long term heat therapydue to their thermal properties,” pointed out and Prof. K.L. Yadav, who led the research team.

Prof.Yadav told India Science Wire that it would be possible to implant the new material into knee joints once a liquid formulation was developed. “The heat generated by nanoparticles, when heat treatmentis given, will spread over the afflicted area for a long duration without affecting nearby cells or tissues. This will help us in getting a focused treatment only in the area where the therapy is required,” he added.

Osteoarthritis is a degenerative joint disease which leads to loss of bone cartilage and eventual inflammation of bone and joints.The present line of treatment for of Osteoarthritis involves anti-inflammatory drugs and steroids, which critical side effects. Other techniques like knee replacement costly. “We wanted to develop a low cost, affordable, safe and simple therapeutic technique to inhibit the progression of the disease and enable the patient to recover faster,” he added. The team is also planning to carry forward the research with human clinical trials in collaboration with hospitals.

The research team included S. Mohapatra, R. Mishra, P.Roy, S. Satapathi along with K.L. Yadav. (India Science Wire)


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