Magnetocaloric and magnetoresistance properties in Co-based (Co0.402Fe0.201Ni0.067B0.227Si0.053Nb0.05)(100-x)Cu-x (x=0-1) glassy alloys
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Date
2016-08-17
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Taylor & Francis
Abstract
The magnetocaloric and magnetoresistance properties of amorphous Co-based (Co0.402Fe0.201Ni0.067B0.227Si0.053Nb0.05)(100-x)Cu-x (x=0, 0.5, 0.75 and 1) ribbons were investigated. Cu additions changed the crystallisation temperature (T-x) and the Curie temperature (T-C). The saturation magnetisation (M-s) and coercivity (H-c) for alloys were in the range of 65.51-38.49 emu/g and 1.99-6.84 A/m, respectively. Under an applied magnetic field change of 2.2 T, the (-S-M)(max) for (Co0.402Fe0.201Ni0.067B0.227Si0.053Nb0.05)(100-x)Cu-x with x=0, 0.5, 0.75 and 1 are 0.77, 0.71, 0.89 and 0.67 Jkg(-1)K(-1), respectively. The values of refrigeration capacity (RC) for the as-spun glassy alloys are comparable with those of previously studied Fe-based metallic glasses such as Fe80B10Zr9Cu1, (Fe0.76B0.24)(96)Nb-4 and Fe82Ni2Zr6B10. In addition, the maximum magnetoresistance (MR) values for (Co0.402Fe0.201Ni0.067B0.227Si0.053Nb0.05)(100-x)Cu-x with x=0, 0.5, 0.75 and 1 are found to be 110, 38, 23 and 1% around the Curie temperatures under an applied magnetic field change of 1 T, respectively. With good RC, negligible hysteresis due to very low coercivity values and large magnetoresistance, these Co-based amorphous alloys can be used as the high temperature magnetic refrigerants and multifunctional applications working in the temperature range of 450-600K.
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Materials science, Metallurgy & metallurgical engineering, Physics, Metallic glasses, Magnetocaloric effect, Magnetic entropy change, Magnetoresistance, Bulk metallic glasses, Soft-magnetic properties, Forming ability, Room-temperature, Amorphous-alloys, Fe, Ni, Refrigeration, Enhancement, TB, Amorphous alloys, Amorphous silicon, Coercive force, Curie temperature, Galvanomagnetic effects, Glass, High temperature applications, Magnetic fields, Magnetism, Magnetocaloric effects, Magnetoresistance, Metallic glass, Nickel, Silicon, Applied magnetic fields, Co-based amorphous alloys, Fe-based metallic glass, Magnetic entropy change, Magnetic refrigerants, Magnetoresistance properties, Refrigeration capacity, Temperature range, Iron alloys
Citation
Küçük, İ. vd. (2016). "Magnetocaloric and magnetoresistance properties in Co-based (Co0.402Fe0.201Ni0.067B0.227Si0.053Nb0.05)(100-x)Cu-x (x=0-1) glassy alloys". Philosophical Magazine, 96(30), Part A, 3120-3130.