Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


Thesis_Babajide Akintunde.pdf (3.06 MB)

ETD Abstract Container

Abstract Header

A study on the effect of Fe-Ni variation on the magnetocaloric properties of Mn0.5Fe0.5+xNi1-xSi0.94Al0.06 and Mn0.5Fe0.5-xNi1+xSi0.94Al0.06 systems

Akintunde, Babajide O
http://orcid.org/0000-0003-1379-5319
http://rave.ohiolink.edu/etdc/view?acc_num=miami16267284137581

Abstract Details

2021, Master of Science, Miami University, Physics.
Coupled first-order magneto-structural transition (MST) accounts for the giant magnetocaloric effect observed in numerous magnetocaloric materials. Through stoichiometric tuning, MST and associated large magnetocaloric effect (MCE) may be induced in selected intermetallic compounds. In this work, we present an experimental study on the effects of Fe-Ni variation on the structural, magnetic, and magnetocaloric properties of a series of Mn-based Mn0.5Fe0.5+xNi1-xSi0.94Al0.06 and Mn0.5Fe0.5-xNi1+xSi0.94Al0.06 (0 ≤ x ≤ 0.10) compounds. We have prepared the two systems using a standard arc-melting technique followed by a heat treatment at 800 °C for 7 days. All samples undergo MST from low-temperature ferromagnetic orthorhombic phase to high-temperature paramagnetic hexagonal phase. Maximum magnetic entropy changes of |𝛥𝑆𝑀| = 22 and 57 Jkg -1K -1 for ΔH = 2 and 5 T, respectively, have been realized for n0.5Fe0.4Ni1.1Si0.94Al0.06 around 322 K. The large MCEs coupled with the material being composed exclusively of cheap and non-toxic elements make this alloy a potential candidate for application as a magnetic refrigerant.
Mahmud Khan, PhD (Advisor)
Herbert Jaeger, PhD (Committee Member)
Imran Mirza, PhD (Committee Member)
80 p.
Materials Science; Physics; Solid State Physics
Giant magnetocaloric effect; magnetic entropy change; Magnetostructural transition; Magnetic refrigeration

Recommended Citations

Citations

  • Akintunde, B. O. (2021). A study on the effect of Fe-Ni variation on the magnetocaloric properties of Mn0.5Fe0.5+xNi1-xSi0.94Al0.06 and Mn0.5Fe0.5-xNi1+xSi0.94Al0.06 systems [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami16267284137581

    APA Style (7th edition)

  • Akintunde, Babajide. A study on the effect of Fe-Ni variation on the magnetocaloric properties of Mn0.5Fe0.5+xNi1-xSi0.94Al0.06 and Mn0.5Fe0.5-xNi1+xSi0.94Al0.06 systems. 2021. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami16267284137581.

    MLA Style (8th edition)

  • Akintunde, Babajide. "A study on the effect of Fe-Ni variation on the magnetocaloric properties of Mn0.5Fe0.5+xNi1-xSi0.94Al0.06 and Mn0.5Fe0.5-xNi1+xSi0.94Al0.06 systems." Master's thesis, Miami University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami16267284137581

    Chicago Manual of Style (17th edition)

miami16267284137581
368
© 2021, some rights reserved.Creative Commons License A study on the effect of Fe-Ni variation on the magnetocaloric properties of Mn0.5Fe0.5+xNi1-xSi0.94Al0.06 and Mn0.5Fe0.5-xNi1+xSi0.94Al0.06 systems by Babajide O Akintunde is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Miami University and OhioLINK.