Magnetostriction and Magnetocaloric Effect in Mn1 – xFexAs Alloys

• Published in: Physics of metals and metallography Vol. 124; no. 11; pp. 1162 - 1166
• Main Authors: Gadzhiev, A. B., Gamzatov, A. G., Khanov, L. N., Mityuk, V. I., Govor, G. A., Aliev, A. M.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-11-2023; Springer Nature B.V
• Subjects: Chemistry and Materials Science; Electrical and Magnetic Properties; Iron; Magnetostriction; Materials Science; Metallic Materials; Phase transitions; Temperature dependence; Thermal expansion; Transition temperature; magnetocaloric effect; magnetostriction
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X23601956

Some results of studying the temperature dependence of the magnetocaloric effect Δ
Т
ad
, thermal expansion, and magnetostriction in the Mn
1 – 
х
Fe
x
As system (
х
= 0.003, 0.006) in magnetic fields up to 8 T are presented. It has been shown that an increase in the iron concentration in the Mn
1 – 
х
Fe
x
As system leads to the shift of the phase transition temperature towards lower values by 15 K. In a field of 8 T, Δ
Т
ad
 = 8.3 K for Mn
0.997
Fe
0.003
As at an initial temperature
T
0
= 318 K, and Δ
Т
ad
= 7.7 K for Mn
0.994
Fe
0.006
As at
T
0
 = 307 K. The thermal expansion and magnetostriction data show that the magnetostriction decreases with increasing iron concentration, which also leads to a decrease in the magnetocaloric effect.