Determining the permeability of magnetic thin film material by magnetic force microscopy: relation with superconducting thin films

Ona, Artorix de la Cruz de

doi:10.1016/j.physb.2003.11.088

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…MFM represents an optimal compromise among these approaches, providing a suitably high lateral spatial resolution (≥ 20 nm) to resolve a wide range of magnetic textures [ 41–44 ] while also enabling quantitative estimates of intrinsic magnetic properties of materials with judicious modeling of probe‐sample geometry. [ 45–48 ] Although MFM is most often used to resolve magnetic fields originating from FM materials, it can also be used to resolve magnetic fields associated with induced, stray, or residual fields in AFM materials. [ 49–52 ] Despite the manifest utility of MFM for investigating magnetic behavior, its application to 2D materials has so far been minimal, being applied only to relatively thick layered magnetic materials that are effectively in their bulk magnetic state.…”

Section: Introductionmentioning

confidence: 99%

Visualizing Atomically Layered Magnetism in CrSBr

et al. 2022

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ability to synthesize and characterize 2D materials with long-range magnetic order was notably absent. Such materials hold great promise for potential applications in spintronics, [6][7][8][9][10][11] topological superconductivity, [12,13] vdW heterostructures, [14,15] and memory storage. [16,17] Hypothetical 2D magnets defy the Mermin-Wagner theorem, [18] which states that long-range magnetic order cannot exist at finite temperature within the 2D isotropic Heisenberg model. [19] Hence, magnetic anisotropy is a necessary prerequisite to realizing stable 2D magnetism, and has been demonstrated to exist in several layered materials over the last few years. [3,4,[20][21][22][23][24][25][26] Among these, the chromium trihalides CrX 3 (X = Cl, Br, I) have been the most extensively studied, all of which display intralayer ferromagnetic (FM) order and either FM or antiferromagnetic (AFM) interlayer coupling depending on the choice of halide and crystal thickness. [27] Despite their extensive characterization, chromium trihalides suffer from a lack of air and moisture stability and possess relatively low transition temperatures, limiting their applications. On the other hand, CrSBr has emerged [28][29][30][31] as an air-stable layered magnetic material possessing A-type AFM ordering with a comparatively high Néel temperature (T N ≈ 132 K).A variety of analytical tools have been used to characterize CrSBr, including magnetometry, [32,33] magneto-transport, [32,33] 2D materials can host long-range magnetic order in the presence of underlying magnetic anisotropy. The ability to realize the full potential of 2D magnets necessitates systematic investigation of the role of individual atomic layers and nanoscale inhomogeneity (i.e., strain) on the emergence of stable magnetic phases. Here, spatially dependent magnetism in few-layer CrSBr is revealed using magnetic force microscopy (MFM) and Monte Carlo-based simulations. Nanoscale visualization of the magnetic sheet susceptibility is extracted from MFM data and force-distance curves, revealing a characteristic onset of both intra-and interlayer magnetic correlations as a function of temperature and layer-thickness. These results demonstrate that the presence of a single uncompensated layer in odd-layer terraces significantly reduces the stability of the low-temperature antiferromagnetic (AFM) phase and gives rise to multiple coexisting magnetic ground states at temperatures close to the bulk Néel temperature (T N ). Furthermore, the AFM phase can be reliably suppressed using modest fields (≈16 mT) from the MFM probe, behaving as a nanoscale magnetic switch. This prototypical study of few-layer CrSBr demonstrates the critical role of layer parity on field-tunable 2D magnetism and validates MFM for use in nanomagnetometry of 2D materials (despite the ubiquitous absence of bulk zero-field magnetism in magnetized sheets).The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202201000.

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Section: Introductionmentioning

confidence: 99%

Visualizing Atomically Layered Magnetism in CrSBr

et al. 2022

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Theory of vortex force microscopy in superconducting layers

Ona

Badía-Majós²

2004

Phys. Rev. B

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The interaction between a vortex within a finite-thickness type-II superconductor and a magnetic force microscopy tip is studied. By analyzing the expression of the arising lateral force, we show that the superconducting penetration depth may be recovered from experiment, using the so-called Laplace transform inversion method. This entails a vertical displacement experiment. The consideration of lateral scanning modes has allowed us to extend the theory to the more stable Hankel transform inversion method, which eventually becomes a Fourier analysis application. For the case of vortices in two-layered superconductors, we show that magnetic particle manipulation is possible by tuning the configuration of the layers.

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Determining the permeability of magnetic thin film material by magnetic force microscopy: relation with superconducting thin films

Cited by 2 publications

References 15 publications

Visualizing Atomically Layered Magnetism in CrSBr

Visualizing Atomically Layered Magnetism in CrSBr

Theory of vortex force microscopy in superconducting layers

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