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Master's Thesis Sharmistha.pdf (1.98 MB)

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The Effect of Partial Substitution of Ni by Co and Cu on the Magnetic and Magnetocaloric Properties of the Intermetallic System Mn0.5Fe0.5Ni1-x(CuCo)xSi0.94Al0.06

Bhattacharjee, Sharmistha
http://orcid.org/0009-0008-3278-2365
http://rave.ohiolink.edu/etdc/view?acc_num=miami1690323735506094

Abstract Details

2023, Master of Science, Miami University, Physics.
The magnetocaloric effect is a measure of the thermal change that magnetic materials experience when placed in an external magnetic field. Materials that exhibit large magnetocaloric effects can be used in magnetic refrigeration technology, which is significantly more energy efficient than the existing gas-based cooling technologies. Ongoing research in this field is focused on the development of magnetocaloric materials that are highly efficient, viable, and non-hazardous. In this thesis research, the structural, magnetic, and magnetocaloric properties of the Co and Cu doped intermetallic system, Mn0.5Fe0.5Ni1−x(CuCo)xSi0.94Al0.06 have been investigated. The materials were prepared by arc melting and annealing techniques, and their structural properties were studied by x-ray diffraction measurements. The diffraction patterns confirmed that all samples exhibited the single-phase hexagonal crystal structure. The phase purity and actual compositions of the alloys were confirmed by SEM micrographs. All the samples exhibited first-order phase transitions that were accompanied by thermal hysteresis. For a magnetic field change of 50 kOe peak entropy changes of up to -42.4 J kg -1 K-1 near 356 K was measured. For the corresponding material, a refrigeration capacity (RC) of 201 J/kg was calculated. The experimental data and a detailed discussion of the experimental results are presented in this thesis.
Mahmud Khan (Advisor)
Samir Bali (Committee Member)
Perry Corbett (Committee Member)
71 p.
Physics
Magnetocaloric Effect, Magnetic Materials, Magnetic Refrigeration

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Citations

  • Bhattacharjee, S. (2023). The Effect of Partial Substitution of Ni by Co and Cu on the Magnetic and Magnetocaloric Properties of the Intermetallic System Mn0.5Fe0.5Ni1-x(CuCo)xSi0.94Al0.06 [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1690323735506094

    APA Style (7th edition)

  • Bhattacharjee, Sharmistha. The Effect of Partial Substitution of Ni by Co and Cu on the Magnetic and Magnetocaloric Properties of the Intermetallic System Mn0.5Fe0.5Ni1-x(CuCo)xSi0.94Al0.06 . 2023. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1690323735506094.

    MLA Style (8th edition)

  • Bhattacharjee, Sharmistha. "The Effect of Partial Substitution of Ni by Co and Cu on the Magnetic and Magnetocaloric Properties of the Intermetallic System Mn0.5Fe0.5Ni1-x(CuCo)xSi0.94Al0.06 ." Master's thesis, Miami University, 2023. http://rave.ohiolink.edu/etdc/view?acc_num=miami1690323735506094

    Chicago Manual of Style (17th edition)

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This open access ETD is published by Miami University and OhioLINK.