In this section
@article{Datta:2024:10.1016/j.jmmm.2024.171743,
author = {Datta, A and Mazumdar, D and Banerjee, S and Das, I},
doi = {10.1016/j.jmmm.2024.171743},
journal = {Journal of Magnetism and Magnetic Materials},
title = {Magnetic, magnetocaloric and critical behavior studies in Heusler compounds Co<inf>2-x</inf>Cr<inf>1+x</inf>Al},
url = {http://dx.doi.org/10.1016/j.jmmm.2024.171743},
volume = {591},
year = {2024}
}
TY - JOUR
AB - The polycrystalline Co2-xCr1+xAl (x = 0, 0.2, 0.4, 0.6, 0.8) compounds have been prepared successfully using the arc-melting technique. Room temperature XRD patterns indicate that all compounds have Heusler compound-like fcc structure along with B2 disorder. With the increasing Cr concentration within the compounds, the value of the lattice parameter increases. All compounds undergo a second-order paramagnetic (PM) to ferromagnetic (FM) transition and the value of PM-FM transition temperature (TC) decreases from 328 K to 134 K with increasing Cr concentration. For all compounds, the experimentally obtained value of MS is quite lower than the value of MS calculated from the well-known Slater-Pauling rule and the values of MS also decrease with increasing Cr concentration within the compounds. The magnetic entropy changes (ΔSM) and relative cooling power (RCP) for the Co2-xCr1+xAl (x = 0, 0.2, 0.4, 0.6) compounds have been calculated. The maximum magnetic entropy change (-ΔSMmax) and RCP both decrease with increasing the Cr concentration within the compounds. The values of critical exponents β, γ, δ associated with the magnetic phase transition have been estimated using the various well-established methods such as modified Arrott plot, power-law, Kouvel-Fisher methods and critical isotherm analysis for the Co2-xCr1+xAl (x = 0, 0.2, 0.4, 0.6) compounds. The obtained values of critical exponents, β and γ, for all compounds, do not follow any conventional universality class. Except for Co2CrAl (x = 0), the obtained β values for the other compounds (Cr-doped compounds) are quite higher than the highest β value among all theoretical models (the highest β value is 0.5 which belongs to the mean-field model). The high value of β occurs due to the Cr doping on the Co site in the system which creates disorder in the system. β>0.5 for all compounds, which indicates the long-range ordering below TC. The obtained
AU - Datta,A
AU - Mazumdar,D
AU - Banerjee,S
AU - Das,I
DO - 10.1016/j.jmmm.2024.171743
PY - 2024///
SN - 0304-8853
TI - Magnetic, magnetocaloric and critical behavior studies in Heusler compounds Co<inf>2-x</inf>Cr<inf>1+x</inf>Al
T2 - Journal of Magnetism and Magnetic Materials
UR - http://dx.doi.org/10.1016/j.jmmm.2024.171743
VL - 591
ER -