Table 1 Martensite transformation temperatures (A s DSC, A f DSC, M s DSC, M f DSC), Curie point (T C A), transformation enthalpy change (ΔH endo and ΔH exo ) and transformation entropy change (ΔS tr endo and ΔS tr exo) during heating/cooling process obtained by DSC curves of Ni47−xMn43Sn10Cox (x = 0, 6, 11) alloys.

From: Enhanced magnetocaloric effect in Ni-Mn-Sn-Co alloys with two successive magnetostructural transformations

Alloys

Transformation temperatures, K

ΔH endo , J/g

ΔS tr endo, J/kg·K

ΔH exo , J/g

ΔS tr exo, J/kg·K

A s DSC

A f DSC

M s DSC

M f DSC

T C A

Co01*

336

344

334

327

—

16.5 ± 0.2

48.5 ± 0.5

16.9 ± 0.1

51.1 ± 0.3

Co62*

314

326

310

304

387

10.8 ± 0.06

33.7 ± 0.2

9.9 ± 0.06

32.2 ± 0.2

Co113*

307

323

289

271

476

5.5 ± 0.2

17.7 ± 0.6

4.7 ± 0.2

16.9 ± 0.6

  1. 1*Co0 - Ni45.6±0.2Mn43.6±0.1Sn10.8±0.1, 2*Co6 - Ni40.6±0.1Mn43.3±0.1Sn10.0±0.04Co6.1±0.04, 3*Co11 - Ni35.7±0.2Mn44.1±0.2Sn9.2±0.06Co11.0±0.1 (data indicate atomic percent, at. %).
Back to article page