Film growth and magnetic anisotropy of thin Ni electrodeposits on (001) Cu films

Kuriki, Shinya

doi:10.1002/pssa.2210510125

Cited by 1 publication

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“…Advantages of the method include fast growth, highly homogeneous structure and good adhesion of material to substrate. Magnetic properties of thin nickel films have been studied on the metal substrates [7][8][9] and little information is present for electrodeposited films on silicon [10,11] and GaAs [12,13].…”

Section: Introductionmentioning

confidence: 99%

Granulated media for nanoelectronic applications

Ognev

Sukovatitsina

Diga

et al. 2012

J. Phys.: Conf. Ser.

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Abstract. We report our experimental results on the structural and magnetic characteristics of nickel films electrodeposited on n-type (111) silicon substrates. Using scanning electron microscopy (SEM), magnetic force microscopy (MFM) and magnetic hysteresis loops, we indeed find a nominal thickness for transition from island to continuous film before which the magnetization of nanoparticles of Ni is represented by vortex states. The evidence of nonuniform ground states in Ni granules has been proofed by micromagnetic simulations. After the formation of a continuous film, stripe magnetic domains are formed with spontaneous in plane magnetization. IntroductionAn investigation of magnetic nanostructures is interested from both fundamental and practical points of view. The possible magnetic configurations in such structures are vortex state or single domain state which are stable for a long time in the wide range of applied magnetic fields. Unique physical properties of magnetic nanostructures make them suitable to be used as magnetic recording media [1,2] and logic elements [3,4]. It is well known that magnetic configuration in a nanostructure depends not only on material properties, but on its shape. A lot of studies focus on 2D structures with different geometry, for instance, discs, rings, ellipses and etc. However, one can modify micromagnetic structure and magnetization reversal with manipulating lateral parameters of 3D nanostructures [5,6]. A cheap and effective method for fabrication of magnetic nanostructures based on "bottom-up" approach is electrodeposition of metals in an appropriative electrolyte under an adequate electrical potential between two immersing electrodes. Advantages of the method include fast growth, highly homogeneous structure and good adhesion of material to substrate. Magnetic properties of thin nickel films have been studied on the metal substrates [7][8][9] and little information is present for electrodeposited films on silicon [10,11] and GaAs [12,13].In this paper we report on an investigation of granular Ni films with different nominal thickness electrodeposited on Si(111) substrate. The deployment of silicon wafer as a substrate allowed excepting any seed layer. We show an evolution of micromagnetic structure and magnetic properties at the crossover from island-like to continuous Ni films.

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