The measurement of magneto-optical Kerr effect of ultrathin films in a pulsed magnetic field

Chen, Xi; Qian, Xuan; Meng, Kangkang; Zhao, Jianhua; Ji, Yang

doi:10.1016/j.measurement.2012.05.014

Cited by 5 publications

(1 citation statement)

References 19 publications

(15 reference statements)

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“…The Curie temperature, saturation magnetization, remanent magnetization, coercive field, and magnetic anisotropy are among the most important parameters of magnetic materials, determining their applicability. Several magnetometers, including those based on a superconducting quantum interference device (SQUID) [6], magneto-optical Kerr effect [7][8], alternating gradient [9], vibrating samples (VSM) [10], and the Hall effect [11,12], with different sensitivities and costs, have been designed and successfully used. Also, magnetic nanoparticles have a large potential for biomedical applications [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Versatile Hall magnetometer with variable sensitivity assembly for characterization of the magnetic properties of nanoparticles

Araújo

Vieira

Osorio

et al. 2019

Journal of Magnetism and Magnetic Materials

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 A Hall magnetometer with variable sensitivity is constructed to measure the magnetic properties of magnetic nanoparticles manufactured by different methods. This novel magnetometer can also be used to measure bulk materials and samples in liquids. The magnetometer is constructed with two commercial Hall-effect sensors in an acrylic structure, which serves as the support for a micrometer and the circuit board with the sensors. For operation, the magnetometer it acquires a complete magnetization curve in a few minutes. If has a magnetic moment sensitivity of 1.3 × 10 -9 Am 2 to sensitivity of 493 mV/mT, the sensitivity can be adjustable in the range of 10 to 493 mV/mT. Its performance is tested with magnetic nanoparticles. As an application example, we estimate the mean diameter of the nanoparticles using the magnetic curves. The results are compared with those obtained by other techniques, such as transmission electron microscopy (TEM), X-ray diffraction (XRD) and dynamic light scattering (DLS). The magnetization results are also compared with those obtained by independent commercial magnetometers, which reveals errors of approximately ±0.31 Am 2 /kg (i.e., 0.6%) in the saturation region.

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