Element Selective Probe of the Ultra-Fast Magnetic Response to an Element Selective Excitation in Fe-Ni Compounds Using a Two-Color FEL Source

Ferrari, Eugenio; Spezzani, Carlo; Fortuna, Franck; Delaunay, Renaud; Vidal, Franck; Nikolov, Ivaylo; Cinquegrana, Paolo; Diviacco, Bruno; Gauthier, David; Penco, Giuseppe; Ribič, Primož Rebernik; Roussel, Eléonore; Trovò, Mauro; Moussy, Jean-Baptiste; Pincelli, Tommaso; Lounis, Lounès; Svetina, Cristian; Zangrando, Marco; Mahne, Nicola; Raimondi, Lorenzo; Manfredda, Michele; Pedersoli, Emanuele; Capotondi, Flavio; Demidovich, Alexander; Giannessi, Luca; Kiskinova, Maya; De Ninno, Giovanni; Danailov, Miltcho Boyanov; Allaria, Enrico; Sacchi, Maurizio

doi:10.3390/photonics4010006

Volume 4, Issue 1

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Element Selective Probe of the Ultra-Fast Magnetic Response to an Element Selective Excitation in Fe-Ni Compounds Using a Two-Color FEL Source

Eugenio Ferrari^1,2,†, Carlo Spezzani^1,3, Franck Fortuna⁴, Renaud Delaunay⁵, Franck Vidal⁶, Ivaylo Nikolov¹, Paolo Cinquegrana¹, Bruno Diviacco¹, David Gauthier¹, Giuseppe Penco¹

, Primož Rebernik Ribič¹, Eléonore Roussel¹

, Mauro Trovò¹, Jean-Baptiste Moussy⁷, Tommaso Pincelli⁸, Lounès Lounis^6,9, Cristian Svetina^1,10, Marco Zangrando^1,11

, Nicola Mahne¹, Lorenzo Raimondi¹, Michele Manfredda¹, Emanuele Pedersoli¹

, Flavio Capotondi¹, Alexander Demidovich¹, Luca Giannessi^1,12, Maya Kiskinova¹, Giovanni De Ninno^1,13, Miltcho Boyanov Danailov¹, Enrico Allaria^1,* and Maurizio Sacchi^6,14,*

ELETTRA—Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy

Dipartimento di Fisica, Università degli Studi di Trieste, 34127 Trieste, Italy

Laboratoire de Physique des Solides, Université Paris-Sud, CNRS-UMR 8502, Bât. 510, 91405 Orsay, France

⁴

Centre de Sciences Nucléaires et de Sciences de la Matière, Université Paris-Sud, CNRS UMR 8609, Bât. 104-108, 91405 Orsay, France

⁵

Laboratoire de Chimie Physique Matière et Rayonnement, Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7614, 75005 Paris, France

⁶

Institut des NanoSciences de Paris, Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7588, 75005 Paris, France

⁷

Service de Physique de l’Etat Condensé, DSM/IRAMIS/SPEC, CNRS UMR 3680, CEA Saclay, 91191 Gif-sur-Yvette, France

⁸

Dipartimento di Fisica, Università degli Studi di Milano, 20133 Milano, Italy

⁹

Ecole Normale Supérieure, PSL Research University, 75231 Paris, France

¹⁰

Graduate School of Nanotechnology, Università degli Studi di Trieste, 34127 Trieste, Italy

¹¹

Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy

¹²

ENEA, Centro Ricerche Frascati, Via E. Fermi 45, 00044 Frascati, Italy

¹³

Laboratory of Quantum Optics, University of Nova Gorica, 5001 Nova Gorica, Slovenia

¹⁴

Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, B.P. 48, 91192 Gif-sur-Yvette, France

Authors to whom correspondence should be addressed.

^†

Current Address: Particle Accelerator Physics Laboratory, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.

Photonics 2017, 4(1), 6; https://doi.org/10.3390/photonics4010006

Received: 18 December 2016 / Revised: 18 January 2017 / Accepted: 20 January 2017 / Published: 26 January 2017

(This article belongs to the Special Issue Extreme UV Lasers: Technologies and Applications)

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Abstract

The potential of the two-color mode implemented at the FERMI free-electron laser (FEL) source for pumping and probing selectively different atomic species has been demonstrated by time-resolved scattering experiments with permalloy (FeNi alloy) and NiFe₂O₄ samples. We monitored the ultra-fast demagnetization of Ni induced by the pump FEL pulse, by tuning the linearly-polarized FEL probe pulse to the Ni-3p resonance and measuring the scattered intensity in the transverse magneto-optical Kerr effect geometry. The measurements were performed by varying the intensity of the FEL pump pulse, tuning its wavelength to and off of the Fe-3p resonance, and by spanning the FEL probe pulse delays across the 300–900 fs range. The obtained results have evidenced that for the case of NiFe₂O₄, there is a sensible difference in the magnetic response at the Ni site when the pump pulse causes electronic excitations at the Fe site. View Full-Text

Keywords: free electron laser; two-color source; ultra-fast dynamics

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Ferrari, E.; Spezzani, C.; Fortuna, F.; Delaunay, R.; Vidal, F.; Nikolov, I.; Cinquegrana, P.; Diviacco, B.; Gauthier, D.; Penco, G.; Ribič, P.R.; Roussel, E.; Trovò, M.; Moussy, J.-B.; Pincelli, T.; Lounis, L.; Svetina, C.; Zangrando, M.; Mahne, N.; Raimondi, L.; Manfredda, M.; Pedersoli, E.; Capotondi, F.; Demidovich, A.; Giannessi, L.; Kiskinova, M.; De Ninno, G.; Danailov, M.B.; Allaria, E.; Sacchi, M. Element Selective Probe of the Ultra-Fast Magnetic Response to an Element Selective Excitation in Fe-Ni Compounds Using a Two-Color FEL Source. Photonics 2017, 4, 6.