Nonmagnetic to magnetic nanostructures via ion irradiation

Dev, B. N. ; Bera, S. ; Satpati, B. ; Goswami, D. K. ; Bhattacharjee, K. ; Satyam, P. V. ; Yamashita, K. ; Liedke, O. M. ; Potzger, K. ; Fassbender, J. ; Eichhorn, F. ; Gröetzschel, R. (2006) Nonmagnetic to magnetic nanostructures via ion irradiation Microelectronic Engineering, 83 (4-9). pp. 1721-1725. ISSN 0167-9317

Full text not available from this repository.

Official URL:

Related URL:


A Pt/C multilayer stack (15 layer-pairs) with Fe impurities was prepared on a glass substrate by the ion sputtering technique. Ion irradiation effects on this multilayer were studied following irradiation with 2 MeV Au ions at fluences from 1 × 1014 to 1 × 1015 ions/cm2. Irradiation induced atomic displacements in such multilayers have been earlier analyzed by a combined X-ray standing wave (XSW) and X-ray reflectivity (XRR) technique with a depth resolution better than 0.2 nm [S.K. Ghose, B.N. Dev, Phys. Rev. B 63 (2001) 245409; S.K. Ghose, D.K. Goswami, B. Rout, B.N. Dev, G. Kuri, G. Materlik, Appl. Phys. Lett. 79 (2001) 467]. Using the combined XSW-XRR technique ion beam induced preferential movement of Fe from C- to Pt-layers has been detected. At the highest ion fluence Pt layers (containing Fe) break into nanoparticles apparently surrounded by C. Grazing incidence X-ray diffraction (GIXRD) measurements indicate the formation of FePt particles in the irradiated multilayer samples. Results of magnetic force microscopy (MFM) and magneto-optical Kerr effect (MOKE) measurements reveal that while the virgin sample hardly shows any magnetism, the irradiated samples show a soft ferromagnetism with an increasing coercive field with increasing ion fluence. Use of focused ion beam to fabricate ferromagnetic nanodots and their possible uses in spin electronics are discussed.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Multilayers; Ion Irradiation; Ferromagnetism
ID Code:10119
Deposited On:02 Nov 2010 10:21
Last Modified:30 May 2011 05:43

Repository Staff Only: item control page