Direct Measurement of the Magnetocaloric Effect in La (Fe ,Si ,Co )13 Compounds in Pulsed Magnetic Fields
Abstract
We report on magnetization, magnetostriction, and magnetocaloric-effect measurements of polycrystalline LaFe11.74Co0.13 Si1.13 and LaFe11.21Co0.65 Si1.11 performed in both pulsed and static magnetic fields. Although the two compounds behave rather differently at low fields (∼5 T ), they show quite similar values of the magnetocaloric effect, namely a temperature increases of about 20 K at high fields (50-60 T). The magnetostriction and magnetization also reach very similar values here. We are able to quantify the magnetoelastic coupling and, based on that, apply the Bean-Rodbell criterion distinguishing first- and second-order transitions.
- Publication:
-
Physical Review Applied
- Pub Date:
- July 2017
- DOI:
- 10.1103/PhysRevApplied.8.014037
- Bibcode:
- 2017PhRvP...8a4037Z