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Effect of swift heavy ion irradiation on sputter deposited SiO2/Co/Pt/SiO2 multilayers
Walia R., Pivin J.C., Jain R., Jayaganthan R., Pippel E. et al
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 280 (2012) 123-130 - http://hal.in2p3.fr/in2p3-00684592
Physique/Matière Condensée/Science des matériaux
Effect of swift heavy ion irradiation on sputter deposited SiO2/Co/Pt/SiO2 multilayers
R. Walia, J.C. Pivin1, R. Jain, R. Jayaganthan, E. Pippel, F. Singh, R. Chandra
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
http://www-csnsm.in2p3.fr/
CNRS : UMR8609 – IN2P3 – Université Paris XI - Paris Sud
batiments 104 et 108 - 91405 Orsay Campus
France
CSNSM PCI
The present paper reports the structural and magnetic properties of sputter deposited (SiO2/Co/Pt/SiO2) n multilayers deposited by magnetron sputtering on quartz substrates as a function of the number of layers (n=1, 2, 3, 4) and the effect of swift heavy ions (120 MeV Ag+9) irradiation on them. The deposition of multilayers was performed under high vacuum on substrates held at 7800 C. All the deposited films were found to contain stoichiometric (Co50 Pt50) particles with L10 ordered structure and their coercivity increases with the increasing number of layers. The formation of L10 ordered structure was evidenced by the presence of (001), (110) super lattice peaks in XRD patterns and from selected area electron diffraction pattern images in TEM. The coercivity of these films was measured using SQUID magnetometer. Irradiation of these films induced an increase in coercivity together with a loss of chemical ordering in the metal phase. However, the easy axis of magnetization remained in the film plane contrary to the case of FePt particles in silica matrix as previously reported.

Articles dans des revues avec comité de lecture
2012
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (Nucl. Instr. & Meth. Phys. B)
Publisher Elsevier
ISSN 0168-583X 
280
123-130

CSNSM PCI
Magnetron Sputtering – Multilayers – Magnetic storage – Magnetic Measurement