Ion irradiation effects on bcc Fe/Tb multilayers

Teillet, J.; Richomme, F.; Fnidiki, A.; Toulemonde, M.

doi:10.1103/physrevb.55.11560

Cited by 37 publications

(20 citation statements)

References 21 publications

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“…Ability to control thin film growth, layer-by-layer, has advanced our understandings of physics and physical phenomena like Giant Magneto Resistance (GMR) in two-dimensional systems. This is reported for magnetic metallic combinations like Fe/Cr, Co/Cu, Fe/ Mo, W/Fe [1][2][3][4][5][6], which found a tremendous impact in GMR and magnetic data storage. However, in these systems interface quality plays a decisive role to achieve optimum performance of GMR applications [7,8].…”

Section: Introductionmentioning

confidence: 90%

Effect of swift heavy ion irradiation in Fe/W multilayer structures

Bagchi

Anwar

Lalla

2009

Applied Surface Science

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Section: Introductionmentioning

confidence: 90%

Effect of swift heavy ion irradiation in Fe/W multilayer structures

Bagchi

Anwar

Lalla

2009

Applied Surface Science

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Section: Pacsmentioning

confidence: 99%

“…The other is solid-state reaction, which was first introduced by Schwarz and Johnson who reported the formation of amorphous alloy films just by thermal annealing the polycrystalline Au−La multilayers [4]. From then on, many studies have been carried out on the amorphization induced by ion-beam mixing and thermal annealing in the binary metallic multilayered films [5,6].One common characteristic of ion-mixing (IM) and solidstate reaction (SSR) methods is that they both start with multilayered films. It is obvious that the multilayered films consist of a certain number of interfaces, and the detailed structure of the interfaces, for example, texture and smoothness, should play some roles in influencing the amorphization behavior.…”

mentioning

confidence: 99%

Different alloying behaviors of Co-Mo multilayered films upon ion irradiation and thermal annealing

Cheng

Yang

Liu

2000

Applied Physics A: Materials Science & Processing

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The Co−Mo system is characterized by a small negative heat of formation being −7 kJ/mol, which provides a small driving force for alloying. In the case of the initial multilayered films with closest-packed semi-coherent interfaces, solid-state interfacial reaction is frustrated upon thermal annealing even at a temperature up to 600 • C. However, amorphization through interfacial reaction was achieved upon ion irradiation as the intensive ion irradiation can elevate the initial energetic state by the irradiation energy as well as destroy the semi-coherent interfaces and thus drive atomic mixing in the films eventually becoming disordered. PACS: 64.70.Kb; 61.82.Bg; 68.65.+g Amorphous alloys have various inviting properties and have attracted much research effort since the 1950s [1], when the first amorphous films were synthesized by quenching a vapor mixture of two constituent metals onto a cryogenically cooled substrate. However, the films so obtained were very unstable and they even recrystallized at room temperature. In the following years a variety of techniques have been developed to form amorphous phase. In the early 1960s, the liquid melt quenching method was reported by Duwez et al. to fabricate Au−Si amorphous alloys [2]. In the 1980s, two other effective glass-producing techniques were proposed. One is ion mixing of multilayered films, which features a high effective cooling speed of 10 13 -10 14 K/s and has produced a great number of amorphous alloy phases including those recognized previously as non-glass-forming ones upon liquid melt quenching [3]. The other is solid-state reaction, which was first introduced by Schwarz and Johnson who reported the formation of amorphous alloy films just by thermal annealing the polycrystalline Au−La multilayers [4]. From then on, many studies have been carried out on the amorphization induced by ion-beam mixing and thermal annealing in the binary metallic multilayered films [5,6].One common characteristic of ion-mixing (IM) and solidstate reaction (SSR) methods is that they both start with multilayered films. It is obvious that the multilayered films consist of a certain number of interfaces, and the detailed structure of the interfaces, for example, texture and smoothness, should play some roles in influencing the amorphization behavior. Previous studies show that in the binary metal system with a large negative heat of formation, the interfacial structures have various influences on the solid-state reaction, i.e. the disordered interfaces can act as the nucleation sites for the amorphous phase [7], and the semi-coherent interfaces work as a nucleation and kinetic barrier to amorphization [8].In this study, the Co−Mo system with a small negative heat of formation (−7 kJ/mol) was selected for a comparative study to investigate the effect of semi-coherent interfaces on the alloying behavior when Co−Mo multilayered films are subjected to ion irradiation and thermal annealing.

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“…Swift heavy ions (SHI) lose their energy in the target mainly via inelastic collisions, leading to the excitation of the target electrons. Subsequently, the electronic energy loss (S e ) creates various modifications in the target material, which include the creation of point defects, latent track formation (2), sputtering (3)(4)(5)(6)(7), intermixing across the interfaces (8)(9)(10)(11)(12)(13)(14)(15)(16)(17) and recrystallization (18). The materials which undergo significant modifications under SHI irradiation are known as *Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Role of melting temperature in intermixing of miscible metal/metal bilayers induced by swift heavy ions

Gupta

Chauhan

Agarwal

et al. 2011

Radiation Effects and Defects in Solids

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Som (2011) Role of melting temperature in intermixing of miscible metal/metal bilayers induced by swift heavy ions, Radiation Effects and DefectsIn the present work, we have investigated the role of melting temperature in miscible metallic systems, where one component is sensitive and the other component is insensitive to electronic energy deposition. The metal/metal bilayer system (W/Ti) was prepared by thermal evaporation and the samples were irradiated by 120 MeV Au ions at different fluences ranging from 3 × 10 13 to 1 × 10 14 ions/cm 2 . Rutherford backscattering spectrometry measurements of the pristine and the irradiated samples show that there is no interface mixing due to swift heavy ion (SHI) irradiation. The role of melting temperature in intermixing miscible metal/metal bilayers induced by SHIs has been successfully explained using equations based on calorimetric principle and thermal spike calculations.

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Ion irradiation effects on bcc Fe/Tb multilayers

Cited by 37 publications

References 21 publications

Effect of swift heavy ion irradiation in Fe/W multilayer structures

Effect of swift heavy ion irradiation in Fe/W multilayer structures

Different alloying behaviors of Co-Mo multilayered films upon ion irradiation and thermal annealing

Role of melting temperature in intermixing of miscible metal/metal bilayers induced by swift heavy ions

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