82 citations · 151 across the 14 of their papers we have counts for
9 papers · 1 filter
Influence of oxygen ion implantation on magnetic microstructure in Pt/Co/Pt multilayers with perpendicular magnetic anisotropy
Anmol Sharma, Mukul Gupta, Prasanta Karmakar +7
The interaction of oxygen with cobalt and cobalt-based alloys has been a very important topic in the field of spintronics as it leads to enhanced orbital anisotropy and interfacial…
Evolution of magnetic anisotropy in cobalt film on nanopatterned silicon substrate studied in situ using MOKE
Khushboo Bukharia, Prasanta Karmakar, Dileep Kumar +1
Evolution of magnetization behaviour of cobalt film on nano patterned silicon substrate, with film thickness, has been studied. In situ magneto-optical Kerr effect measurements dur…
Impurity in low energy Ar+ ion beam is the cause of pattern formation on Si
Dipak Bhowmik, Manabendra Mukherjee, Prasanta Karmakar
We report the decisive role of reactive ion impurities in low energy Ar+ ion beam on surface nanopattern formation. The source of experimental inconsistency in pattern formation by…
Nanopattern on Carbon and by Carbon
S. Bhattacharjee, P. Karmakar, V. Naik +2
We have reported nanopattern formation on carbon thin film and Si(100) surfaces by low energy inert and carbon ion beams. It is interesting to observe the role of carbon as target…
Key factors of ion induced nanopatterning
S. Bhattacharjee, P. Karmakar, A. Chakrabarti
We have reported the dependence of projectile mass, chemical reactivity and effect of molecular beams on the ion induced nano structure formation, when 8 keV He1+, N1+, O1+, Ar1+ a…
Coulomb explosion sputtering of selectively oxidized Si
P. Karmakar, S. Bhattacharjee, V. Naik +2
We have studied multiply charged Arq+ ion induced potential sputtering of a unique system comprising of coexisting Silicon and Silicon oxide surfaces. Such surfaces are produced by…
Ion beam sputtering induced ripple formation in thin metal films
P. Karmakar, D. Ghose
We have observed the formation of ripples in a number of thin metal films, e.g. Au, Pt, Ag, Cu and Co under Ar^{+} ion beam sputtering at grazing incidence. The structures are foun…
Low energy Ar ion beam induced kinetic roughening of thin Pt films on a Si substrate
P. Karmakar, D. Ghose
A 30 nm Pt thin film evaporated onto a Si wafer was sputtered by 8 keV Ar ions at various ion doses. The evolution of the modified sputtered films was monitored by atomic for…
Evidence of potential sputtering of ultra-thin Pt films due to impact of multi-charged Ar ions
D. Ghose, P. Karmakar
The phenomenon of potential sputtering of ultra-thin Pt films due to impact of 20 keV highly charged (q = 3 - 8) ions has been investigated. The results show enhanced ero…