Formation of double ring patterns on Co2MnSi Heusler alloy thin film by anodic oxidation under scanning probe microscope

Abstract

Double ring formation on Co 2 MnSi (CMS) films is observed at electrical breakdown voltage during local anodic oxidation using atomic force microscope (AFM). Corona effect and segregation of cobalt in the vicinity of the rings is studied using magnetic force microscopy and energy dispersive spectroscopy. Double ring formation is explained on the basis of the interaction of ablated material with the induced magnetic field of the tip to sample current. Steepness of forward bias transport characteristics from the unperturbed region of the CMS film suggest a non equilibrium spin contribution, compared to corona region of the ring. Formation of such mesoscopic textures in magnetic films by AFM tip can be potentially used for lithography and memory storage applications.

Structural ordering driven anisotropic magnetoresistance, anomalous Hall resistance, and its topological overtones in full-Heusler Co2MnSi thin films

“…While, a large number of full-Heusler alloy thin films have been grown on semiconductors like Si, 14 Ge, 15 and GaAs; 16 there are few reports on the films grown on oxide substrates such as Al 2 O 3 , 17,18 MgO 18-20 and SrTiO 3 . 21,22 Various deposition techniques such as laser ablation, 16,18,19,[21][22][23] sputtering [24][25][26][27] and molecular beam epitaxy 28 are in use for the growth of such films under varying conditions of growth. It is well-known that the choice of the deposition temperature, growth conditions, and substrates can significantly alter the structural, magnetic, and electronic properties of thin films.…”

Magnetoelastic coupling induced magnetic anisotropy in Co2(Fe/Mn)Si thin films

“…13) as well as on SrTiO 3 (STO). [14][15][16] While the substrate lattice parameter, growth, thermal annealing condition, and film thickness in these cases vary significantly, the effect of such condition on magnetic anisotropy of the films is seldom addressed. In Heusler alloys films, one expects a four-fold anisotropy due to the cubic symmetry of the unit cell, while in-plane uniaxial anisotropy has also been observed for the case of Co 2 FeSi grown on GaAs.…”

First‐principle calculations on Li2CuSb: A novel material for lithium‐ion batteries

“…[10][11][12] During the lithiation process, the usage of transition metal oxides as an anode has also shown better cycling stability. 13,14 Another versatile material, known as Heusler alloys, is mostly investigated for spintronics [15][16][17][18] thermoelectrics, 19-23 catalysis, [24][25][26] and many more interesting areas, [27][28][29] but very few people have tried to explore these alloys as a potential electrode material for lithium ion-based batteries. [30][31][32] The better stability, robustness, sustainability, and a high value of theoretical gravimetric (specific) capacity make these materials a promising candidate for battery applications.…”