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Isotropic bonded magnets with a high loading fraction of 70 vol.% Nd-Fe-B are fabricated via an extrusion-based additive manufacturing, or 3D printing system that enables rapid production of large parts for the first time. The density of…

The capacity to externally manipulate magnetic properties is highly desired from both fundamental and technological perspectives, particularly in the development of magnetoelectronics and spintronics devices. Here, using first-principles…

材料科学 · 物理学 2024-02-27 Rui-Qi Wang , Tian-Min Lei , Yue-Wen Fang

The magnetization reversal in stripe-like exchange bias patterned $\rm Ni_{81}Fe_{19}/IrMn$ thin films was investigated by complementary inductive and high resolution magneto optical magnetometry, magneto optical Kerr microscopy, and…

材料科学 · 物理学 2015-05-14 C. Hamann , B. P. Toperverg , K. Theis-Bröhl , M. Wolff , R. Kaltofen , I. Mönch , J. McCord , L. Schultz

Focused electron beam induced deposition (FEBID) is a direct write technique for depositing materials on a support substrate akin to 3D printing with an electron beam (e-beam). Opportunities exist for merging this existing technique with…

材料科学 · 物理学 2023-07-13 Ondrej Dyck , Andrew R. Lupini , Philip D. Rack , Jason Fowlkes , Stephen Jesse

Antiferromagnetic spintronic devices have the potential to outperform conventional ferromagnetic devices due to their ultrafast dynamics and high data density. A challenge in designing these devices is the control and detection of the…

材料科学 · 物理学 2021-01-20 Sarah Jenkins , Roy W. Chantrell , Richard F. L. Evans

Altermagnetism is an emerging series of unconventional magnetic materials characterized by time-reversal symmetry breaking and spin-split bands in the momentum space with zero net magnetization. Metallic altermagnets offer unique advantages…

材料科学 · 物理学 2025-02-20 Weiwei Sun , Mingzhuang Wang , Baisheng Sa , Shaui Dong , Carmine Autieri

Atomically thin two dimensional magnets have given rise to emergent phenomena due to magnetic exchange and spin-orbit coupling showing a great promise for realizing ultrathin device structures. In this paper, we critically examine the…

介观与纳米尺度物理 · 物理学 2021-12-22 Duo Wang , Xin Chen , Biplab Sanyal

Gallium arsenide (GaAs) is the widest used second generation semiconductor with a direct band gap and increasingly used as nanofilms. However, the magnetic properties of GaAs nanofilms have never been studied. Here we find by comprehensive…

计算物理 · 物理学 2017-12-05 Huan Lu , Jin Yu , Wanlin Guo

We investigate spin-wave transport in hybrid two-dimensional magnonic crystals comprising a low-damping yttrium iron garnet (YIG) film coupled to a periodic array of CoFeB nanodisks. Using propagating spin-wave spectroscopy, super-Nyquist…

The determination of the chemical content is crucial for the quality control in high-precision device fabrication and advanced process development. For reliable chemical composition characterization, certain interaction volume of the target…

Ferromagnetic materials have been utilised as recording media within data storage devices for many decades. Confinement of the material to a two dimensional plane is a significant bottleneck in achieving ultra-high recording densities and…

Diameter-modulated nanowires offer an important paradigm to design the magnetization response of 3D magnetic nanostructures by engineering the domain wall pinning. With the aim to understand its nature and to control the process, we analyze…

介观与纳米尺度物理 · 物理学 2022-06-16 Jose A. Fernandez-Roldan , Rafael P. del Real , Cristina Bran , Manuel Vazquez , Oksana Chubykalo-Fesenko

We synthesized and characterized the colloidal suspensions of $FeO \cdot Fe_{(2-x)}Nd_{x}O_{3}$ nanoparticles with $x=0.00, 0.02, 0.04, 0.06 \text{ and }0.1.$ The effect of the $Fe^{3+}$ ion replacement by $Nd^{3+}$ on the crystal structure…

The engineering of surface morphology and structure of the thin film is one of the essential technological assets for regulating the physical properties and functionalities of thin film-based devices. This study investigates the evolution…

材料科学 · 物理学 2023-06-21 Anup Kumar Bera , Md. Shahid Jamal , Avinash Ganesh Khanderao , Dileep Kumar

In view of potential applications of magnetic particles in biomedicine and electromagnetic devices, we made use of the classical Stober method base-catalysed hydrolysis and condensation of tetraethoxysilane (TEOS) to encapsulate FeNi…

材料科学 · 物理学 2009-11-13 M Ammar , F Mazaleyrat , J P Bonnet , P Audebert , A Brosseau , G Wang , Y Champion

Magnetic properties of core-shell cobalt ferrite nanoparticles 15 to 48nm prepared by a sol-gel route have been studied. It is shown that the coercivity follows non-monotonic size dependence varying as 1/d above the maximum (d is the…

斑图形成与孤子 · 物理学 2015-06-26 A. Mumtaz , K. Maaz , B. Janjua , S. K. Hasanain

Assessing and controlling magnetic interactions in magnetic nanostructures are critical to nanomagnetic and spintronic explorations, such as magnetic recording media, permanent magnets, magnetic memory and logic devices, etc. Here we…

The magnetic properties of Nd${}_2$Fe${}_{14}$B (NFB)/transition metal (TM = Fe, Co) multilayer systems are studied on the basis of first-principles density functional calculations. We optimize the model structure under a variety of…

介观与纳米尺度物理 · 物理学 2016-01-13 Nobuyuki Umetsu , Yuta Toga , Akimassa Sakuma

FeTe is a prototypical parent compound of iron-based superconductors. While bulk FeTe is non-superconducting with a long-range bicollinear antiferromagnetic order, superconductivity has been achieved in thin films. However, the approaches…

A hallmark of the iron-based superconductors is the strong coupling between magnetic, structural and electronic degrees of freedom. However, a universal picture of the normal state properties of these compounds has been confounded by recent…