Magnetic forces in paramagnetic fluids

Butcher, Tim A.; Coey, J. M. D.

doi:10.1088/1361-648x/aca37f

Cited by 8 publications

(2 citation statements)

References 182 publications

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“…Magnetic fluids were a kind of intelligent materials that could transform from liquid to solid state under an external magnetic field, and the yield stress/viscosity could increase several times in a few milliseconds. − Due to their unique magnetorheological (MR) behavior, magnetic liquids had been widely used in the fields of polishing fluids, brakes, drug-targeted transport, and dampers. − The MR effect was greatly influenced by properties of magnetic particles, such as diameter, weight, roughness, etc. ,− However, these influencing factors were generally studied at the macroscopical level. The microstructures of magnetic fluids had a decisive effect on the macroscopic MR effect, and it was still a great challenge to investigate the mechanisms of microstructures on the MR effect of magnetic fluids.…”

Section: Introductionmentioning

confidence: 99%

Nanosphere Chain Model of Magnetic Fluid and Its Dynamic Performance

Wang,

Liu,

Lian

et al. 2024

Langmuir

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The magnetorheological effect is a critically important mechanical property of magnetic fluids. Accurately capturing the macroscopic properties of magnetorheological fluids with elongated particle forms, such as nanosphere chains, remains a challenging task, particularly due to the complexities arising from particle asymmetry. Traditional particle dynamics primarily utilize spherical particles as computational units, but this approach can lead to significant inaccuracies, especially when analyzing nonspherical magnetorheological fluids, due to the neglect of particle asymmetry. In this work, an advanced particle dynamics model has been developed by integrating the rotation and collision of these asymmetric particles, specifically tailored for the configuration of nanosphere chains. This model exhibits a significant reduction in error by a factor of 3.883, compared to conventional particle models. The results demonstrate that alterations in the geometric characteristics of magnetic nanosphere chains can cause changes in mesoscopic structures and magnetic potential energy, thereby influencing the mechanical properties at the macroscopic level. This work has developed an accurate mesoscopic simulation method for calculating chain-type magnetorheological fluids, establishing a connection between mesoscopic structures and macroscopic properties, and unveiling the tremendous potential for accelerating the design of next-generation magnetic fluids using this approach.

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Section: Introductionmentioning

confidence: 99%

Nanosphere Chain Model of Magnetic Fluid and Its Dynamic Performance

Wang,

Liu,

Lian

et al. 2024

Langmuir

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“…The majority of investigations have focused on the crystal growth in a magnetic field dedicated to diamagnetic crystals [15,16], including protein crystals [17,18]. For paramagnetic compounds, some rare studies have been carried out on their solutions [19][20][21], and in some cases, they have been used as crystallization agents [22,23]. Only a few studies have focused on the growth of paramagnetic crystals in a magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Microgravity-like Crystallization of Paramagnetic Species in Strong Magnetic Fields

Samsonenko,

Artiukhova,

Letyagin

et al. 2024

IJMS

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The crystallization of paramagnetic species in a magnetic field gradient under microgravity-like conditions is an area of interest for both fundamental and applied science. In this paper, a setup for the crystallization of paramagnetic species in the magnetic field up to 7 T generated by a superconducting magnet is described. The research includes calculations of the conditions necessary to compensate for the gravitational force for several types of paramagnetic substances using the magnetic field of superconducting magnets (4.7 T, 7 T, 9.4 T, and 16.4 T). Additionally, for the first time, the crystallization of copper sulfate and cobalt sulfate, as well as a mixture of copper sulfate and cobalt sulfate under gravitational force compensation in a superconducting magnet, was performed. This paper experimentally demonstrates the feasibility of growing paramagnetic crystals within the volume of a test tube on the example of copper and cobalt sulfate crystals. A comparison of crystals grown from the solution of a mixture of copper and cobalt sulfates under the same conditions, with and without the presence of a magnetic field, showed changes in both the number and size of crystals.

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Dopant concentration dependent room temperature ferromagnetism in crystalline Sc doped AlN thin films

Zhu

Chen

et al. 2023

Journal of Alloys and Compounds

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Magnetic forces in paramagnetic fluids

Cited by 8 publications

References 182 publications

Nanosphere Chain Model of Magnetic Fluid and Its Dynamic Performance

Nanosphere Chain Model of Magnetic Fluid and Its Dynamic Performance

Microgravity-like Crystallization of Paramagnetic Species in Strong Magnetic Fields

Dopant concentration dependent room temperature ferromagnetism in crystalline Sc doped AlN thin films

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