| A Stable CrO2 Nanoparticles and a Process for its Manufacture | |
| अन्वेषक | Mr. Somnath Biswas Dr. S. Ram |
| Patent | 198130 |
| A stable granular GMR materials of CrO2 nano-particles especially for use in magnetic memory devices and more particularly in a magnetic random access memory for writing information with a reduced write-current and other applications. Also disclosed is the process for preparing stabilized single phase CrO2 in form of a finely divided loose power suitable for fabrication small devices and components in a specific shape of size. The stable CrO2 nano-particles have a value of the saturation magnetization of Ms of 35 to 48 preferably 45.8 emu/g, coercivity Hc of 200 to 300 Oe at room temperature, the GMR properties with a value of MR 20% to 50% preferably 40% at liquid helium temperature. Importantly, the above GMR properties appear in a peculiar microstructure with as small crystallites as a few nanometers in size. Such small particles have many distinct features because of a rather large fraction of atoms present in the grain surface or boundaries. The finely divided loose CrO2 nano-powders are advantageously of a narrow size distribution. |
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| प्रभारी प्राध्यापक, IPR & IR प्रायोजित शोध एवं औद्योगिक सलाहकारिता भारतीय प्रौद्योगिकी संस्था खड़गपुर 721302 भारत ई-मेल: ipr @ sric.iitkgp.ernet.in |
संकायाध्यक्ष प्रायोजित शोध एवं औद्योगिक सलाहकारिता भारतीय प्रौद्योगिकी संस्था खड़गपुर 721302 भारत ई-मेल: deansr @ hijli.iitkgp.ernet.in |