Influence of replacement of Mn by Cr on magnetocaloric properties of quenched NiMn1–xCrxGe alloys

Автор(и)

  • E. Zubov G.V. Kurdyumov Institute for Metal Physics, NASU, 36 Acad. Vernadsky Boulevard, Kyiv 03680, Ukraine
  • A. Szytuła Institute of Physics, Jagiellonian University, 4 Reymonta, Kraków 30-059, Poland
  • V. Dyakonov Institute of Physics, PAS, 32/46 Al. Lotników, Warsaw 02-668, Poland
  • A. Ślawska-Waniewska Institute of Physics, PAS, 32/46 Al. Lotników, Warsaw 02-668, Poland
  • W. Bażela Institute of Physics, Krakow University of Technology, 1 Podchorążych, Kraków 30-084, Poland
  • V. Valkov О.О. Galkin Donetsk Institute of Physics and Engineering, 46 Nauki Ave., Kyiv 03680, Ukraine
  • M. Marzec Institute of Physics, Jagiellonian University, 4 Reymonta, Kraków 30-059, Poland
  • Yu. Tyvanchuk Faculty of Chemistry, Ivan Franko National University of Lviv, 6 Kyryla i Mephodia Str., Lviv 79005, Ukraine
  • K. Dyakonov Ioffe Physico-Technical Institute RAS, St.-Petersburg 194021, Russia
  • A. Sivachenko О.О. Galkin Donetsk Institute of Physics and Engineering, 46 Nauki Ave., Kyiv 03680, Ukraine
  • N. Nedelko Institute of Physics, PAS, 32/46 Al. Lotników, Warsaw 02-668, Poland
  • H. Szymczak Institute of Physics, PAS, 32/46 Al. Lotników, Warsaw 02-668, Poland

DOI:

https://doi.org/10.1063/1.5049157

Ключові слова:

intermetallic alloys NiMn1–xCrxGe, magnetization, magnetic phase transition, magnetic entropy, magnetocaloric effect.

Анотація

In this paper, the crystallographic, magnetic, thermomagnetic, and magnetocaloric properties of the quenched NiMn1–xCrxGe (x = 0.04, 0.18 and 0.25) half-Heusler alloys have been studied by x-ray diffraction, differential scanning calorimetry and magnetization measurements. An influence of partial substitution of Cr for Mn and quenching of the samples on the character of structural and magnetic phase transitions is presented. Quenching of the alloys results in the formation of two phase (orthorhombic and hexagonal) crystal structure. The magnetic properties were investigated by means of magnetization measurements over a wide temperature (5–400 K) and magnetic field (up to 60 kOe) ranges. The experimental data indicate that at quenching and with increasing Cr content the magnetic order changes from antiferromagnetic to ferromagnetic. Hardened compounds exhibit a thermal hysteresis in the vicinity of the magnetic phase transition, what is characteristic for a first-order magnetic phase transition. The magnetic phase transition temperatures are decreased as a result of quenching of the samples. The magnetic entropy changes were calculated using the field dependences of isothermal magnetization in terms of the thermodynamic Maxwell relation. The magnetic entropy changes, |ΔSMmax|, obtained for the hardened alloys with x = 0.25 have the maximum value equal to 23 J/(kg·K) near the magnetic phase transition for a field change of ΔH = 0–60 kOe.

Завантаження

Дані завантаження ще не доступні.

Downloads

Опубліковано

2018-10-02

Як цитувати

(1)
Zubov, E.; Szytuła, A.; Dyakonov, V.; Ślawska-Waniewska, A.; Bażela, W.; Valkov, V.; Marzec, M.; Tyvanchuk, Y.; Dyakonov, K.; Sivachenko, A.; Nedelko, N.; Szymczak, H. Influence of Replacement of Mn by Cr on Magnetocaloric Properties of Quenched NiMn1–xCrxGe Alloys. Fiz. Nizk. Temp. 2018, 44, 989-995.

Номер

Розділ

Низькотемпературний магнетизм

Статті цього автора (авторів), які найбільше читають

1 2 3 4 5 > >>