Phase Transitions and Magnetocaloric Properties in MnCo 1−x Zr x Ge Compounds

Aryal, Anil; Quetz, Abdiel; Pandey, Sudip; Dubenko, Igor; Stadler, Shane; Ali, Naushad

doi:10.1155/2017/2683789

Title: Phase Transitions and Magnetocaloric Properties in MnCo _1−x Zr _x Ge Compounds

Journal Article · Tue Jun 13 00:00:00 EDT 2017 · Advances in Condensed Matter Physics

DOI:https://doi.org/10.1155/2017/2683789· OSTI ID:1363725

^[1]; Quetz, Abdiel ^[1];

^[1]; Dubenko, Igor ^[1]; Stadler, Shane ^[2]; Ali, Naushad ^[1]

Southern Illinois Univ., Carbondale, IL (United States). Dept. of Physics
Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy

The structural, magnetic, and magnetocaloric properties of $MnC o_{1 - x} Z r_{x} Ge$ ( $0.01 \leq x \leq 0.04$ ) have been studied through X-ray diffraction, differential scanning calorimetry, and magnetization measurements. Results indicate that the partial substitution of Zr for Co in $MnC o_{1 - x} Z r_{x} Ge$ decreases the martensitic transition temperature ( $T_{M}$ ). For $x$ = 0.02, $T_{M}$ was found to coincide with the ferromagnetic transition temperature ( $T_{C}$ ) resulting in a first-order magnetostructural transition (MST). A further increase in zirconium concentration ( $x$ = 0.04) showed a single transition at $T_{C}$ . The MST from the paramagnetic to ferromagnetic state results in magnetic entropy changes ( $- Δ S_{M}$ ) of 7.2 J/kgK for $Δ H$ = 5 T at 274 K for $x$ = 0.02. The corresponding value of the relative cooling power (RCP) was found to be 266 J/kg for $Δ H$ = 5 T. Thus, the observed large value of MCE and RCP makes this system a promising material for magnetic cooling applications.

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Research Organization:: Southern Illinois Univ., Carbondale, IL (United States); Louisiana State Univ., Baton Rouge, LA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-06ER46291; FG02-13ER46946

OSTI ID:: 1363725

Alternate ID(s):: OSTI ID: 1430123

Journal Information:: Advances in Condensed Matter Physics, Journal Name: Advances in Condensed Matter Physics Vol. 2017; ISSN 1687-8108

Publisher:: HindawiCopyright Statement

Country of Publication:: Egypt

Language:: English

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Cited by: 8 works

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References (13)

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