We investigate the chemical, electronic, and magnetic structure of the magnetocaloric LaFeCoSi compound with bulk and surface sensitive techniques. We put in evidence that the surface retains a soft ferromagnetic behavior at temperatures higher than the Curie temperature of the bulk due to the presence of Fe clusters at the surface only. This peculiar magnetic surface effect is attributed to the exchange interaction between the ferromagnetic Fe clusters located at the surface and the bulk magnetocaloric alloy, and it is used here to monitor the magnetic properties of the alloy itself.
Chemical, electronic, and magnetic structure of LaFeCoSi alloy: Surface and bulk properties / Lollobrigida, V; Basso, Vittorio; Borgatti, F; Torelli, P; Kuepferling, Michaela; Coisson, Marco; Olivetti, ELENA SONIA; Celegato, F; Tortora, L; Stefani, G; Panaccione, G; Offi, F.. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 115:20(2014). [10.1063/1.4879195]
Chemical, electronic, and magnetic structure of LaFeCoSi alloy: Surface and bulk properties
BASSO, VITTORIO;KUEPFERLING, MICHAELA;COISSON, MARCO;OLIVETTI, ELENA SONIA;Celegato F;
2014
Abstract
We investigate the chemical, electronic, and magnetic structure of the magnetocaloric LaFeCoSi compound with bulk and surface sensitive techniques. We put in evidence that the surface retains a soft ferromagnetic behavior at temperatures higher than the Curie temperature of the bulk due to the presence of Fe clusters at the surface only. This peculiar magnetic surface effect is attributed to the exchange interaction between the ferromagnetic Fe clusters located at the surface and the bulk magnetocaloric alloy, and it is used here to monitor the magnetic properties of the alloy itself.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
