TY - JOUR
T1 - Peculiarities of the magnetocaloric properties in Ni-Mn-Sn ferromagnetic shape memory alloys
AU - Khovaylo, V. V.
AU - Skokov, K. P.
AU - Gutfleisch, O.
AU - Miki, H.
AU - Takagi, T.
AU - Kanomata, T.
AU - Koledov, V. V.
AU - Shavrov, V. G.
AU - Wang, G.
AU - Palacios, E.
AU - Bartolomé, J.
AU - Burriel, R.
PY - 2010/6/7
Y1 - 2010/6/7
N2 - 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.
AB - 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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U2 - 10.1103/PhysRevB.81.214406
DO - 10.1103/PhysRevB.81.214406
M3 - Article
AN - SCOPUS:77955740723
VL - 81
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 21
M1 - 214406
ER -