Influence of Magnetic Domain Walls and Magnetic Field on the Thermal Conductivity of Magnetic Nanowires

Huang, Hao-Ting; Lai, Mei-Feng; Hou, Yun–Fang; Wei, Zung‐Hang

doi:10.1021/nl502577y

Cited by 23 publications

(24 citation statements)

References 49 publications

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“…Magnetic nanoparticles (MNPs) have attracted considerable attention for various biomedical applications [1][2][3][4][5][6], including nanocarriers for biochemical molecules or drug delivery, heat mediators in hyperthermia and contrast-imaging agents in magnetic-resonance imaging (MRI) and magnetic targeting. In these applications, MNPs of homogenous size and uniform shape are desired.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of magnetic nanoparticles coated with polystyrene sulfonic acid for biomedical applications

Chen

Sung

et al. 2020

Science and Technology of Advanced Materials

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The development of novel magnetic nanoparticles (MNPs) with satisfactory biocompatibility for biomedical applications has been the subject of extensive exploration over the past two decades. In this work, we synthesized superparamagnetic iron oxide MNPs coated with polystyrene sulfonic acid (PSS-MNPs) and with a conventional co-precipitation method. The core size and hydrodynamic diameter of the PSS-MNPs were determined as 8-18 nm and 50-200 nm with a transmission electron microscopy and dynamic light scattering, respectively. The saturation magnetization of the particles was measured as 60 emu g −1 with a superconducting quantum-interference-device magnetometer. The PSS content in the PSS-MNPs was 17% of the entire PSS-MNPs according to thermogravimetric analysis. Fouriertransform infrared spectra were recorded to detect the presence of SO 3 − groups, which confirmed a successful PSS coating. The structural properties of the PSS-MNPs, including the crystalline lattice, composition and phases, were characterized with an X-ray powder diffractometer and 3D nanometer-scale Raman microspectrometer. MTT assay and Prussian-blue staining showed that, although PSS-MNPs caused no cytotoxicity in both NIH-3T3 mouse fibroblasts and SK-HEP1 human liver-cancer cells up to 1000 μg mL −1 , SK-HEP1 cells exhibited significantly greater uptake of PSS-MNPs than NIH-3T3 cells. The low cytotoxicity and high biocompatibility of PSS-MNPs in human cancer cells demonstrated in the present work might have prospective applications for drug delivery.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of magnetic nanoparticles coated with polystyrene sulfonic acid for biomedical applications

Chen

Sung

et al. 2020

Science and Technology of Advanced Materials

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“…[ 50,51 ] In addition, the magnetic domain walls were also shown to influence the effective thermal conductivity. [ 52 ] Therefore, the transition from the interlayer parallel state to antiparallel state is expected to significantly change the effective thermal conductivity along the normal direction of the membranes since the m domain wall is in a serial circuit with the domain interior in both layers of the twisted bilayer, implying its promising potential in the application of thermal switch.…”

Section: Resultsmentioning

confidence: 99%

Strain‐Induced Interlayer Parallel‐to‐Antiparallel Magnetic Transitions of Twisted Bilayers

Wang

Yang

Wang

et al. 2021

Advcd Theory and Sims

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The discovery of superconductivity in twisted graphene bilayers with a magic twisting angle ≈1.1° has opened up a wide range of potential twistronic device possibilities. In this work, the twisting effects in spintronic devices are explored. In particular, a material prototype integrating spintronics, straintronics, and twistronics is developed by stacking a twisted CoFe2O4 (CFO) bilayer membrane on a Pb(Mg1/3Nb2/3)O3‐PbTiO3 (PMN‐PT) membrane. Phase‐field simulations are performed to study the magnetic domain configurations and switching in CFO bilayers under piezostrains. An emerging interlayer parallel‐to‐antiparallel magnetic transition of the twisted CFO bilayer induced by appropriate piezostrain pulses generated from the PMN‐PT membrane is discovered. Such a strain‐induced parallel‐to‐antiparallel magnetic transition is non‐volatile and reversible, arising from the synergistic interaction among spin, strain, and twisting order parameters. The present work provides a paradigm for designing novel spinotropic devices by taking advantage of the emerging phenomena generated by twisting.

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“…As an example, Huang et al. [ 149 ] investigated a thermal switch based on ferromagnetic Ni nanowires. In these ferroelectric structures, when no magnetic field was applied (on state), the total thermal conductivity ( k total ) could then be expressed as follows

\begin{matrix} κ_{total} = κ_{normale} + κ_{ph} + κ_{m_short} + κ_{m_long} \end{matrix}

where κ e is the electronic, κ ph is the lattice, κ m_short the magnonic (with short wavelength) and κ m_long the magnonic (with long wavelength) thermal conductivity contributions.…”

Section: Thermal Switchesmentioning

confidence: 99%

Solid‐State Thermal Control Devices

Swoboda

Klinar

Yalamarthy

et al. 2020

Adv Elect Materials

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Over the past decade, solid‐state thermal control devices have emerged as potential candidates for enhanced thermal management and storage. They distinguish themselves from traditional passive thermal management devices in that their thermal properties have sharp, nonlinear dependencies on direction and operating temperature, and can lead to more efficient circuits and energy conversion systems than what is possible today. They also distinguish themselves from traditional active thermal management devices (e.g., fans) in that they have no moving parts and are compact and reliable. In this article, the recent progress in the four broad categories of solid‐state thermal control devices that are under active research is reviewed: diodes, switches, regulators, and transistors. For each class of device, the operation principle, material choices, as well as metrics to compare and contrast performance are discussed. New architectures that are explored theoretically, but not experimentally demonstrated, are also discussed.

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Influence of Magnetic Domain Walls and Magnetic Field on the Thermal Conductivity of Magnetic Nanowires

Cited by 23 publications

References 49 publications

Synthesis and characterization of magnetic nanoparticles coated with polystyrene sulfonic acid for biomedical applications

Synthesis and characterization of magnetic nanoparticles coated with polystyrene sulfonic acid for biomedical applications

Strain‐Induced Interlayer Parallel‐to‐Antiparallel Magnetic Transitions of Twisted Bilayers

Solid‐State Thermal Control Devices

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