Nanopatterning of a thin ferromagnetic CoFe film by focused-ion-beam irradiation

McGrouther, D.; Chapman, J. N.
July 2005
Applied Physics Letters;7/11/2005, Vol. 87 Issue 2, p022507
Academic Journal
High-resolution magnetic patterning of a thin CoFe layer has been performed by irradiation using a focused-ion-beam system. Features <50 nm wide were formed reproducibly. The irradiated pattern comprised sets of alternating 3.0- and 1.0-μm-long magnetic wires, 100 nm wide. During magnetization reversal, the longer wires reversed at a lower field resulting in the formation of an ordered array of domains with density 10 μm-1 supporting antiparallel magnetization. The ability to create domains at predefined locations is important both for fundamental studies and technological applications.


Related Articles

  • Effect of precursor on overcoat properties in ion beam carbon process. Pirzada, Shahid; Liu, Jia J.; Li, Fred; Demczyk, Brian; Spaulding, Dave // Journal of Applied Physics;5/15/2002 Part 1, 2 & 3, Vol. 91 Issue 10, p7562 

    Overcoat thickness is continuously being decreased to achieve higher areal density in magnetic media. The mechanical integrity of thin carbon films (∼30 Å) must be robust enough to act as an effective protection against wear and corrosion. Presently, technologies such as ion beam...

  • Effect of ion bombardment on the surface magnetism of Fe3O4. Aeschlimann, M.; Bona, G. L.; Meier, F.; Stampanoni, M.; Zampieri, G.; Siegmann, H. C. // Applied Physics Letters;9/29/1986, Vol. 49 Issue 13, p824 

    We have found that ion bombardment produces dramatic changes in the surface magnetism of Fe3O4. The surface layer with irregular magnetic behavior is more than 50 Ã… thick. These findings are of importance for current studies of ferritelike sputtered thin films as well as magnetic alloys in...

  • Magnetic coercivity of focused ion beam irradiated lines in a Pt/Co(1.4 nm)/Pt film. Jaworowicz, J.; Zablotskii, V.; Jamet, J.-P.; Ferré, J.; Vernier, N.; Chauleau, J.-Y.; Kisielewski, M.; Sveklo, I.; Maziewski, A.; Gierak, J.; Bourhis, E. // Journal of Applied Physics;May2011, Vol. 109 Issue 9, p093919 

    Regular sets of ultranarrow lines have been patterned on a Pt/Co(1.4 nm)/Pt ultrathin magnetic film by focusing a Ga+ ion beam (FIB) at different fluences. Ga+ ion irradiation is known to soften magnetic properties in such films. Even at low Ga+ ion fluence, and as proved by atomic force...

  • Secondary ion bombardment effects on the magnetic properties and microstructures of ion-beam-deposited TbFe thin films. Yatsuya, S.; Hintz, M. B. // Journal of Applied Physics;5/15/1994, Vol. 75 Issue 10, p7084 

    Presents information on a study that compared the magnetic properties and microstructures of ion-beam-deposited TbFe films made with and without secondary ion bombardment. Experimental procedure; Results and discussion.

  • Effect of Ga+ ion irradiation on the structural and magnetic properties of CoFe/IrMn exchange biased bilayers. McGrouther, D.; Chapman, J. N.; Vanhelmont, F. W. M. // Journal of Applied Physics;6/15/2004, Vol. 95 Issue 12, p7772 

    The effects of focused beam Ga+ ion irradiation on the physical microstructure and magnetic properties of CoFe/IrMn exchange biased bilayers have been investigated by transmission electron microscopy. Only for Ga+ ion doses >1014 ions cm-2 was the microstructure detectably altered with increases...

  • Magnetization reversal in an ordered array of ferromagnetic nanodots. Ivanov, Yu. P.; Pustovalov, E. V.; Ognev, A. V.; Chebotkevich, L. A. // Physics of the Solid State;Nov2009, Vol. 51 Issue 11, p2300 

    The magnetization reversal in an array of Fe nanodots etched from the continuous iron film by a focused Ga+ ion beam has been studied. The size of the dots is 600 nm, and the interdot distances are equal to 3.8 µm, 900 nm, and 700 nm. The energy of the dipole-dipole interaction between the...

  • Summary of Industry-Academia Collaboration Projects on Cluster Ion Beam Process Technology. Yamada, Isao; Matsuo, Jiro; Toyoda, Noriaki // AIP Conference Proceedings;11/3/2008, Vol. 1066 Issue 1, p415 

    Processes employing clusters of ions comprised of a few hundred to many thousand atoms are now being developed into a new field of ion beam technology. Cluster-surface collisions produce important non-linear effects which are being applied to shallow junction formation, to etching and smoothing...

  • New routes for the synthesis of iron oxide based magnetic materials. Joshi, Sushama; Phase, D. M.; Kanetkar, S. M.; Ogale, S. B. // Journal of Applied Physics;4/15/1988, Vol. 63 Issue 8, p3792 

    Presents a study which developed new routes using laser and ion beam techniques to synthesize iron oxide based magnetic materials. Description of the method; Characterization techniques; Function of ion beam induced atomic mixing at the interface between a deposited over layer and iron oxide.

  • Reproducible domain wall pinning by linear non-topographic features in a ferromagnetic nanowire. Basith, M. A.; McVitie, S.; McGrouther, D.; Chapman, J. N. // Applied Physics Letters;6/4/2012, Vol. 100 Issue 23, p232402 

    We demonstrate that for multilayered magnetic nanowires, where the thickness and composition of the individual layers have been carefully chosen, domain walls can be pinned at non-topographic sites created purely by ion irradiation in a focused ion beam system. The pinning results from...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics