Tailored Magnetic Linear Birefringence in Wedge-Shaped Co Nanocluster Assemblies
Source abstract
Abstract
The purpose of this paper is to present an experimental method to induce strong magnetic linear birefringence in two-dimensional assemblies of Co nanoclusters grown on glass plates. Additionally, we have also correlated the magnitude and characteristics of that nonlinear magneto-optical effect with the thickness and profile of those disordered nanostructures. For those aims, we have grown Co nanocluster assemblies on amorphous substrates, by means of pulsed laser ablation in off-axis geometry. This approach enabled us to obtain magnetic media with an intended and pronounced thickness profile, i.e., wedge-shaped assembly, to investigate the orientation and behavior of surface magnetization regarding both the thickness gradient direction and in-plane magnetic field. That study was accomplished by measuring the magneto-optical effects in reflection and transmission configurations, unveiling an out-of-plane magnetization whose magnitude depends closely on the thickness gradient direction. That component, arising from a graded magnetic anisotropy along the wedged nanostructure, adds a reversal mechanism to the surface magnetization, thus being responsible for the magnetic linear birefringence in our ultrathin Co assemblies.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnetic properties of thin films · Theoretical and Computational Physics · Metallic Glasses and Amorphous Alloys
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Facultad de Ciencias y Tenologías Químicas, Universidad de Castilla-La Mancha, Av/ Camilo José Cela 10, 13071 Ciudad Real, Spain
Instituto de Nanociencia, Nanotecnología y Materiales Moleculares, Universidad de Castilla-La Mancha, Campus de la Fábrica de Armas, 45071 Toledo, Spain
Microsystems, Actuators and Sensors Group, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
References (33)
Show source-provided references
1. Pattern-induced ripple structures at silicon-oxide/silicon interface by excimer laser irradiation10.1063/1.1496141 ↗
2. Sub-100 nm nanostructuring of silicon by ultrashort laser pulses10.1364/OPEX.13.006651 ↗
3. Form and magnetic birefringence in undulated Permalloy/PET films10.1364/OE.27.021285 ↗
4. Laser induced nanogratings beyond fused silica-periodic nanostructures in borosilicate glasses and ULETM10.1364/OME.3.001161 ↗
5. Femtosecond laser-pulse-induced birefringence in optically isotropic glass10.1063/1.1707231 ↗
6. Ali, M. (1999). Growth and Study of Magnetostrictive FeSiBC thin Films for Device Applications. [Ph.D. Thesis, University of Sheffield].
7. Sokolov, A. (1967). Optical Properties of Metals, Blackie. [1st ed.].
8. Magnetic birefringence in thin ferromagnetic films10.1088/0022-3727/1/12/314 ↗
9. Uniaxial magnetic anisotropy in nanostructured Co/Cu(001): From surface ripples to nanowires10.1103/PhysRevLett.91.167207 ↗
10. Angular tuning of the magnetic birefringence in rippled cobalt films10.1063/1.4922807 ↗
11. Perpendicular magnetic anisotropy in Pd/Co thin film layered structure10.1063/1.96254 ↗
12. Magnetic anisotropy in metallic multilayers10.1088/0034-4885/59/11/002 ↗
13. Orientational and structural dependence of magnetic anisotropy of Cu/Ni/Cu sandwiches: Misfit interface anisotropy10.1063/1.355372 ↗
14. Surface Magnetism10.1016/0304-8853(91)90836-Y ↗
15. Magnetic properties of Co film in Pt/Co/Cr2O3/Pt structure10.1063/1.5130439 ↗
16. Magnetic ordering in ultrathin cobalt film covered by an overlayer of noble metal10.1063/1.1543914 ↗
17. Preferential alignment of Co moments at Oxide/Co interface in Si/Co/Co-oxide/CoWedge/Pt structure10.1016/j.tsf.2020.138246 ↗
18. Tailoring of the Perpendicular Magnetization Component in Ferromagnetic Films on a Vicinal Substrate10.1103/PhysRevLett.101.217202 ↗
19. Anisotropy of an ultrathin Cu(111)/Co(111)/Cu(111) wedge10.1088/0953-8984/12/39/304 ↗
20. Multilayer exchange spring media for magnetic recording10.1063/1.2347894 ↗
21. Vertically graded anisotropy in Co/Pd multilayers10.1103/PhysRevB.81.100405 ↗
22. On the limits of uniaxial magnetic anisotropy tuning by a ripple surface pattern10.1063/1.4876232 ↗
23. The use of polarized infrared radiation in magneto-optical studies of semiconductors10.1364/AO.2.000527 ↗
24. Krebs, H.U. (2007). Pulsed Laser Deposition of Thin Films. Applications-Led Growth of Functional Materials, Wiley. [1st ed.]. Chapter 16: Pulsed Laser Deposition of Metals.10.1002/9780470052129.ch16 ↗
25. Morphological and magnetic characteristics of monodispersed Co-cluster assemblies10.1063/1.371585 ↗
26. Magnetization Processes in Ultrathin Co Film Grown on Stepped Si(111) Substrate10.1109/TMAG.2008.2001519 ↗
27. Vinogradov, A., Dorofeenko, A., Merzlikin, A., Strelniker, Y., Lisyansky, A., Granovsky, A., and Bergman, D. (2013). Magnetophotonics: From Theory to Applications, Springer. [3rd ed.].
28. Study of magnetic anisotropy and magnetization reversal using the quadratic magnetooptical effect in epitaxial CoxMnyGez(111) films10.1088/0953-8984/21/29/296005 ↗
29. Huge quadratic magneto-optical Kerr effect and magnetization reversal in the Co2FeSi Heusler compound10.1088/0022-3727/40/6/S09 ↗
30. Magnetooptical Voigt effect in rippled polycrystalline Co films10.1088/0022-3727/49/40/405306 ↗
31. Fallarino, L., Riego, P., Kirby, B., Miller, C., and Berger, A. (2018). Modulation of Magnetic Properties at the Nanometer Scale in Continuously Graded Ferromagnets. Materials, 11.10.3390/ma11020251 ↗
32. Continuously graded anisotropy in single (Fe53Pt47)100-xCux films10.1063/1.3505521 ↗
33. Perpendicular magnetisation from in-plane fields in nano-scaled antidot lattices10.1088/0957-4484/26/22/225203 ↗