Peculiarities of the magnetocaloric properties in Ni-Mn-Sn ferromagnetic shape memory alloys

V. V. Khovaylo; K. P. Skokov; O. Gutfleisch; H. Miki; T. Takagi; T. Kanomata; V. V. Koledov; V. G. Shavrov; G. Wang; E. Palacios; J. Bartolomé; R. Burriel

doi:10.1103/PhysRevB.81.214406

Peculiarities of the magnetocaloric properties in Ni-Mn-Sn ferromagnetic shape memory alloys

V. V. Khovaylo, K. P. Skokov, O. Gutfleisch, H. Miki, T. Takagi, T. Kanomata, V. V. Koledov, V. G. Shavrov, G. Wang, E. Palacios, J. Bartolomé, R. Burriel

Research output: Contribution to journal › Article

77 Citations (Scopus)

Abstract

Magnetocaloric properties of a Ni₅₀Mn₃₆Co ₁Sn₁₃ ferromagnetic shape memory alloy have been studied experimentally in the vicinity of a first-order magnetostructural phase-transition low-temperature paramagnetic martensite high-temperature ferromagnetic austenite. The magnetic entropy change Δ Sm calculated from the magnetization M (T) data measured upon cooling is higher than that estimated from M (T) measured upon heating. Contrary to Δ Sm, the adiabatic temperature change Δ Tad measured upon cooling is significantly smaller than that measured upon heating. The apparent discrepancy between Δ Sm and Δ Tad (larger Δ Sm, smaller Δ Tad upon cooling, and smaller Δ Sm, larger Δ Tad upon heating) is caused by the hysteretical behavior of this magnetostructural transition, a feature common for all the alloys in the family of Ni₅₀Mn_25+xZ_25-x (Z=In,Sn,Sb) ferromagnetic shape memory Heusler compounds. The hysteresis causes the magnetocaloric parameters to depend strongly on the temperature and field history of the experimental processes.

Original language	English
Article number	214406
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.81.214406
Publication status	Published - 2010 Jun 7

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Khovaylo, V. V., Skokov, K. P., Gutfleisch, O., Miki, H., Takagi, T., Kanomata, T., Koledov, V. V., Shavrov, V. G., Wang, G., Palacios, E., Bartolomé, J., & Burriel, R. (2010). Peculiarities of the magnetocaloric properties in Ni-Mn-Sn ferromagnetic shape memory alloys. Physical Review B - Condensed Matter and Materials Physics, 81(21), [214406]. https://doi.org/10.1103/PhysRevB.81.214406

Peculiarities of the magnetocaloric properties in Ni-Mn-Sn ferromagnetic shape memory alloys. / Khovaylo, V. V.; Skokov, K. P.; Gutfleisch, O.; Miki, H.; Takagi, T.; Kanomata, T.; Koledov, V. V.; Shavrov, V. G.; Wang, G.; Palacios, E.; Bartolomé, J.; Burriel, R.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 21, 214406, 07.06.2010.

Research output: Contribution to journal › Article

Khovaylo, VV, Skokov, KP, Gutfleisch, O, Miki, H , Takagi, T, Kanomata, T, Koledov, VV, Shavrov, VG, Wang, G, Palacios, E, Bartolomé, J & Burriel, R 2010, 'Peculiarities of the magnetocaloric properties in Ni-Mn-Sn ferromagnetic shape memory alloys', Physical Review B - Condensed Matter and Materials Physics, vol. 81, no. 21, 214406. https://doi.org/10.1103/PhysRevB.81.214406

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abstract = "Magnetocaloric properties of a Ni50Mn36Co 1Sn13 ferromagnetic shape memory alloy have been studied experimentally in the vicinity of a first-order magnetostructural phase-transition low-temperature paramagnetic martensite high-temperature ferromagnetic austenite. The magnetic entropy change Δ Sm calculated from the magnetization M (T) data measured upon cooling is higher than that estimated from M (T) measured upon heating. Contrary to Δ Sm, the adiabatic temperature change Δ Tad measured upon cooling is significantly smaller than that measured upon heating. The apparent discrepancy between Δ Sm and Δ Tad (larger Δ Sm, smaller Δ Tad upon cooling, and smaller Δ Sm, larger Δ Tad upon heating) is caused by the hysteretical behavior of this magnetostructural transition, a feature common for all the alloys in the family of Ni50Mn25+xZ25-x (Z=In,Sn,Sb) ferromagnetic shape memory Heusler compounds. The hysteresis causes the magnetocaloric parameters to depend strongly on the temperature and field history of the experimental processes.",

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