High electronic excitations and ion beam mixing effects in high energy ion irradiated Fe/Si multilayers
- 1 January 1997
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 81 (1) , 116-125
- https://doi.org/10.1063/1.363996
Abstract
Mössbauer spectroscopy (57Fe) shows evidence for mixing effects induced by electronic energy deposition in nanoscale Fe/Si multilayers irradiated with swift heavy ions. A decrease in the mixing efficiency with electronic stopping power is reported; a threshold is found, under which iron environment modifications no longer occur. The kinetics of Fe–Si phase formation after irradiation suggests the existence of three regimes: (i) for high excitation levels, a magnetic amorphous phase is formed directly in the wake of the incoming ion and an almost complete mixing is reached at low fluence (1013 U/cm2); (ii) for low excitation levels, a paramagnetic Si-rich amorphous phase is favored at the interface while crystalline iron subsists at high fluences; (iii) for intermediate excitation levels, saturation effects are observed and the formation rate of both magnetic and paramagnetic phases points to direct mixing in the ion wake but with a reduced track length in comparison to U irradiation. The measured interfacial mixing cross section induced by electronic energy deposition suggests that a thermal diffusion process is mainly involved in addition to damage creation.This publication has 21 references indexed in Scilit:
- Effects induced by high electronic excitations in pure metals: A detailed study in ironNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1994
- α→ω phase transformation induced in titanium during ion irradiations in the electronic slowing-down regimePhilosophical Magazine Letters, 1993
- Ion Beam Mixing Effects Induced in the Latent Tracks of Swift Heavy Ions in a Fe/Si MultilayerEurophysics Letters, 1993
- Latent Tracks Do Exist in Metallic MaterialsEurophysics Letters, 1991
- Evidence for amorphization of a metallic alloy by ion electronic energy lossPhysical Review Letters, 1990
- High electronic excitations and damage production in GeV-ion-irradiated metalsNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1990
- Damage production in iron during high-energy ion irradiation: Experimental and theoretical determinationsNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1989
- Anomalous reduction of stage-I recovery in nickel irradiated with heavy ions in the energy range100–120MeVPhysical Review Letters, 1987
- High-Energy Heavy-Ion Irradiations of Fe 85 B 15 Amorphous Alloy: Evidence for Electronic Energy Loss EffectEurophysics Letters, 1987
- Coulomb Explosions in a Metallic Glass Due to the Passage of Fast Heavy Ions?Physical Review Letters, 1986