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Title: Chemical, electronic, and magnetic structure of LaFeCoSi alloy: Surface and bulk properties

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.

Authors:
 [1]; ; ; ; ;  [2];  [3]; ;  [4];  [5]; ;  [1]
  1. Dipartimento di Scienze, Università Roma Tre, I-00146 Rome (Italy)
  2. Istituto Nazionale di Ricerca Metrologica (INRIM), I-10135 Torino (Italy)
  3. CNR, Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), I-40129 Bologna (Italy)
  4. CNR, Istituto Officina dei Materiali (IOM), Lab. TASC, I-34149 Trieste (Italy)
  5. Laboratorio di Analisi di Superficie, Dipartimento di Matematica e Fisica, Università Roma Tre, I-00146 Rome (Italy)
Publication Date:
OSTI Identifier:
22304371
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 115; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CHEMICAL PROPERTIES; COBALT COMPOUNDS; CURIE POINT; ELECTRICAL PROPERTIES; ELECTRONIC STRUCTURE; EXCHANGE INTERACTIONS; IRON COMPOUNDS; LANTHANUM COMPOUNDS; MAGNETIC PROPERTIES; MAGNETIC SURFACES; QUATERNARY ALLOY SYSTEMS; SILICON COMPOUNDS; SURFACES

Citation Formats

Lollobrigida, V., Dipartimento di Matematica e Fisica, Università Roma Tre, I-00146 Rome, Basso, V., Kuepferling, M., Coïsson, M., Olivetti, E. S., Celegato, F., Borgatti, F., Torelli, P., Panaccione, G., Tortora, L., Dipartimento di Ingegneria Meccanica, Università Tor Vergata, I-00133 Rome, Stefani, G., and Offi, F. Chemical, electronic, and magnetic structure of LaFeCoSi alloy: Surface and bulk properties. United States: N. p., 2014. Web. doi:10.1063/1.4879195.
Lollobrigida, V., Dipartimento di Matematica e Fisica, Università Roma Tre, I-00146 Rome, Basso, V., Kuepferling, M., Coïsson, M., Olivetti, E. S., Celegato, F., Borgatti, F., Torelli, P., Panaccione, G., Tortora, L., Dipartimento di Ingegneria Meccanica, Università Tor Vergata, I-00133 Rome, Stefani, G., & Offi, F. Chemical, electronic, and magnetic structure of LaFeCoSi alloy: Surface and bulk properties. United States. https://doi.org/10.1063/1.4879195
Lollobrigida, V., Dipartimento di Matematica e Fisica, Università Roma Tre, I-00146 Rome, Basso, V., Kuepferling, M., Coïsson, M., Olivetti, E. S., Celegato, F., Borgatti, F., Torelli, P., Panaccione, G., Tortora, L., Dipartimento di Ingegneria Meccanica, Università Tor Vergata, I-00133 Rome, Stefani, G., and Offi, F. 2014. "Chemical, electronic, and magnetic structure of LaFeCoSi alloy: Surface and bulk properties". United States. https://doi.org/10.1063/1.4879195.
@article{osti_22304371,
title = {Chemical, electronic, and magnetic structure of LaFeCoSi alloy: Surface and bulk properties},
author = {Lollobrigida, V. and Dipartimento di Matematica e Fisica, Università Roma Tre, I-00146 Rome and Basso, V. and Kuepferling, M. and Coïsson, M. and Olivetti, E. S. and Celegato, F. and Borgatti, F. and Torelli, P. and Panaccione, G. and Tortora, L. and Dipartimento di Ingegneria Meccanica, Università Tor Vergata, I-00133 Rome and Stefani, G. and Offi, F.},
abstractNote = {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.},
doi = {10.1063/1.4879195},
url = {https://www.osti.gov/biblio/22304371}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 20,
volume = 115,
place = {United States},
year = {Wed May 28 00:00:00 EDT 2014},
month = {Wed May 28 00:00:00 EDT 2014}
}