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The surface of metal nanoparticles can support plasmonic excitations. These excitations dramatically amplify the electric field of incident light (by several orders of magnitude), potentially ionizing the irradiated nanoparticles in a…

光学 · 物理学 2025-04-08 Dmitri E. Kharzeev , Jacob Levitt , Carlos Trallero-Herrero

This work reports on the synthesis and characterization of a new type of electrospun magnetic nanofibers (MNFs), and their application for degradation of organic pollutants using remote magnetic inductive heating. We describe a simple…

Magnetic nanoparticles play a crucial role in different fields such as biomedicine or information and quantum technologies. These applications require nanoparticles with a single, well-defined energy minimum, free of metastable states, and…

介观与纳米尺度物理 · 物理学 2024-10-28 D. García-Pons , J. Pérez-Bailón , A. Méndiz , V. Júlvez , M. Hack , K. Wurster , R. Kleiner , D. Koelle , M. J. Martínez-Pérez

Superconducting technology provides most sensitive field detectors, promising implementations of qubits and high field magnets for medical imaging and for most powerful particle accelerators. Thus, with the discovery of new superconducting…

We synthesized single crystalline and policrystalline MgB_2 under ambient pressures. The single crystals of MgB_2 were of good quality, where the crystal structure refinements were successfully converged with R = 0.020. The specific heat of…

超导电性 · 物理学 2009-11-07 Y. Machida , S. Sasaki , H. Fujii , M. Furuyama , I. Kakeya , K. Kadowaki

We report a giant magnetic moment enhancement of ferromagnetic nickel nanoparticles (11 nm) embedded in multi-walled carbon nanotubes. High-energy synchrotron x-ray diffraction experiment and chemical analysis are used to accurately…

强关联电子 · 物理学 2010-05-04 Guo-meng Zhao , Pieder Beeli , Jun Wang , Yang Ren

In laboratories, ultrahigh magnetic fields are usually produced with very large currents through superconducting, resistive or hybrid magnets, which require extreme conditions, such as low temperature, huge cooling water or tens of…

The incessant technological pursuit towards a more sustainable and green future depends strongly on permanent magnets. At present, their use is widespread, making it imperative to develop new processing methods that generate highly…

We have developed a new material for neutron shielding applications where space is restricted. W$_2$B is an excellent attenuator of neutrons and gamma-rays, due to the combined gamma attenuation of W and neutron absorption of B. However,…

材料科学 · 物理学 2021-04-08 Michail Athanasakis , Eugene Ivanov , Eduardo del Rio , Samuel A. Humphry-Baker

Magnetic hyperthermia treatment (MHT) utilizes heat generated from magnetic nanoparticles (MNPs) under an alternating magnetic field (AMF) for therapeutic applications. Gadolinium silicide (Gd5Si4) has emerged as a promising MHT candidate…

We report the synthesis, x-ray diffraction, magnetic susceptibility and specific heat measurements on polycrystalline samples of undoped LiNi2P3O10 and samples with non-magnetic impurity (Zn2+, S = 0) and magnetic impurity (Cu2+, S = 1/2)…

强关联电子 · 物理学 2011-10-28 P. Khuntia , A. V. Mahajan

We report on the anisotropic properties of Pauli-limited superconductivity (SC) and antiferromagnetism (AFM) in the solid solutions CeCo(In_{1-x}Zn_x)_5 (x<=0.07). In CeCo(In_{1-x}Zn_x)_5, the SC transition temperature T_c is continuously…

Ultrafine (2-5 nm) particles of amorphous Ca-Mg co-doped ferrihydrite have been synthesized by surfactant mediated co-precipitation method. The evolution of the amorphous ferrihydrite by Ca-Mg co-doping is quite different from our earlier…

材料科学 · 物理学 2015-03-02 Samar Layek , M. Mohapatra , S. Anand , H. C. Verma

Nuclear magnetic resonance (NMR/ON) measurements with beta- and gamma-ray detection have been performed on oriented Ag-104(g,m) nuclei with the NICOLE He-3-He-4 dilution refrigerator setup at ISOLDE/CERN. For Ag-104(g) (I-pi = 5(+)) the…

We report magnetic measurements up to 1100 K on a multi-walled carbon nanotube mat sample using a Quantum Design vibrating sample magnetometer. In an ultra-low field (H = -0.02 Oe), we find a very large paramagnetic susceptibility (up to…

超导电性 · 物理学 2007-05-23 Guo-meng Zhao , Pieder Beeli

Epitaxial niobium-nitride thin films with a critical temperature of Tc=16K and a thickness of 100nm were fabricated on MgO(100) substrates by pulsed laser deposition. Low-temperature magnetic force microscopy (MFM) images of the…

超导电性 · 物理学 2015-03-17 T. Shapoval , H. Stopfel , S. Haindl , J. Engelmann , D. S. Inosov , B. Holzapfel , V. Neu , L. Schultz

A potassium alumina borosilicate glass with the composition 13K2O*13Al2O3*16B2O3*43SiO2*15Fe2O3-x was melted using Fe2O3 as raw material. The melt was dumped from a Pt-crucible with a downpipe in water which resulted in the formation of…

材料科学 · 物理学 2011-09-01 M. Büttner , C. Worsch , F. Schmidl , C. Rüssel , P. Seidel

We have studied the magnetocaloric effect (MCE) in the shape-memory Heusler alloy Ni$_{50}$Mn$_{35}$In$_{15}$ by direct measurements in pulsed magnetic fields up to 6 and 20 T. The results in 6 T are compared with data obtained from…

The existence of a new two dimensional CN2 structure was predicted using ab-initio molecular dynamics (AIMD) and density-functional theory calculations. It consists tetragonal and hexagonal rings with C-N and N-N bonds arranged in a…

材料科学 · 物理学 2021-01-29 Qun Wei , Ying Yang , Alexander Gavrilov , Xihong Peng

The isothermal magnetic entropy changes are studied in Ni80Fe20/Ni67Cu33/Co90Cu10/Mn80Ir20 stacks at temperatures near the Curie point of the Ni67Cu33 spacer by applying magnetic fields in a few tens of Oersted. Such low fields were…

介观与纳米尺度物理 · 物理学 2018-08-01 S. N. Vdovichev , N. I. Polushkin , I. D. Rodionov , V. N. Prudnikov , J. Chang , A. A. Fraerman