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SERF magnetometers based on dense ensembles of alkali-metal spins are precision quantum sensors that hold the record of measured and projected sensitivity to magnetic fields, in the $\mu\textrm{G}-\textrm{mG}$ range. At geomagnetic fields…

量子物理 · 物理学 2025-05-29 Mark Dikopoltsev , Uriel Levy , Or Katz

The acute sensitivity of the electrical resistance of certain systems to magnetic fields known as extreme magnetoresistance (XMR) has recently been explored in a new materials context with topological semimetals. Exemplified by WTe$_{2}$…

材料科学 · 物理学 2018-02-28 Linda Ye , Takehito Suzuki , Christina R. Wicker , Joseph G. Checkelsky

A low-energy medium-luminosity Muon Collider (MC) is being studied as a possible Higgs Factory (HF). Electrons from muon decays will deposit more than 300 kW in superconducting magnets of the HF collider ring. This imposes significant…

We demonstrate a scheme for magneto-optically trapping strontium monofluoride (SrF) molecules at temperatures one order of magnitude lower and phase space densities three orders of magnitude higher than obtained previously with laser-cooled…

原子物理 · 物理学 2016-02-17 E. B. Norrgard , D. J. McCarron , M. H. Steinecker , M. R. Tarbutt , D. DeMille

We prepared a powder sample of edwardsite Cd2Cu3(SO4)2(OH)6 4H2O, which is a new candidate compound for the spin-1/2 kagome antiferromagnet, and studied its magnetic properties by magnetic susceptibility and heat capacity measurements.…

材料科学 · 物理学 2015-06-15 Hajime Ishikawa , Yoshihiko Okamoto , Zenji Hiroi

In plane orientation of magnetic easy axis of sputtered strontium hexaferrite thin films has been explained using classical Heisenberg Hamiltonian. The variation of average value of in plane spin component with temperature was plotted in…

材料科学 · 物理学 2016-07-11 P. Samarasekara , Udara Saparamadu

Since 2008, many new families of iron-based high temperature (high-$T_c$) superconductors have been discovered \cite{Hosono,ChenXH,FeTe,ChenXL}. Unlike all parent compounds of cuprates that share a common antiferromagnetically (AF) ordered…

超导电性 · 物理学 2012-04-05 Jiangping Hu , Bao Xu , Wuming Liu , Ningning Hao , Yupeng Wang

The results of magnetic susceptibility, electrical resistivity (rho), and heat capacity measurements as a function of temperature are reported for the alloys, Ce2Rh(1-x)Co(x)Si3, crystallizing in an AlB2-derived hexagonal strcture. Ce2RhSi3…

强关联电子 · 物理学 2008-03-06 Swapnil Patil , Kartik K Iyer , K. Maiti , E. V. Sampathkumaran

Large magnetic entropy change (deltaSM) can realize a prominent heat transformation under the magnetic field and directly strengthen the efficacy of the magnetocaloric effect, which provides a pioneering environmentally friendly solid-state…

材料科学 · 物理学 2025-02-17 Xiaohe Liu , Ping Song , Sen Yao , Yuhao Lei , Ling Yang , Shenxiang Du , Yiran Deng , Defeng Guo

This is an analysis of the itinerant model for antiferromagnetism, in which is included both on-site and inter-site electron correlations. We also consider the band degeneration, which brings into the Hamiltonian the on-site exchange…

强关联电子 · 物理学 2016-08-16 G. Górski , J. Mizia , K. Kucab

Given the paucity of single phase multiferroic materials (with large ferromagnetic moment), composite systems seem an attractive solution in the quest to realize magnetoelectric cou-pling between ferromagnetic and ferroelectric order…

介观与纳米尺度物理 · 物理学 2014-09-15 P. Jain , Q. Wang , M. Roldan , A. Glavic , V. Lauter , C. Urban , Z. Bi , T. Ahmed , J. Zhu , M. Varela , Q. Jia , M. R. Fitzsimmons

Rare-earth (RE) based compounds and alloys are of great interest both for their fundamental physical properties and for applications. In order to tailor the required compounds for a specific task, one must be able to predict the energy…

凝聚态物理 · 物理学 2007-05-23 Nicola Magnani

We show that correlations established before quenching to very low temperatures, later drive the magnetization process of systems of single molecule magnets, after a magnetic field is applied at t=0. We also show that in SC lattices, m…

凝聚态物理 · 物理学 2007-05-23 J. F. Fernandez , J. J. Alonso

Exchange bias effects linked to surface spin freezing (SSF) are commonly found in iron oxide nanoparticles, while signatures of SSF in low-field temperature-dependent magnetization curves have been much less frequently reported. Here, we…

Additive manufacturing of polymer bonded magnets is a recently developed technique, for single-unit production, and for structures that have been impossible to manufacture previously. Also new possibilities to create a specific stray field…

The magnetization of thin films of cobalt ferrite frequently falls far below the bulk value of 455 kAm-1, which corresponds to an inverse cation distribution in the spinel structure with a significant orbital moment of about 0.6 muB that is…

材料科学 · 物理学 2018-01-03 F. Eskandari , S. B. Porter , M. Venkatesan , P. Kameli , K. Rode , J. M. D. Coey

Searching the optimal doping compositions of the Y-type hexaferrite Ba2Mg2Fe12O22 remains a long-standing challenge for enhanced non-collinear magnetic transition temperature (TNC). Instead of the conventional trial-and-error approach, the…

Rare-earth (RE) compounds have been of enormous interest in condensed matter physics as a platform for the exploration of interesting physical phenomena. Here, we report the successful single crystal growth of HoB$_{2}$, which exhibits a…

强关联电子 · 物理学 2025-07-24 Takafumi D. Yamamoto , Hiroyuki Takeya , Kensei Terashima , Akiko T. Saito , Yoshihiko Takano

Scalar spin chirality (SSC) drives a series of topological transports in noncoplanar magnets. However, the ordering temperature of magnet hosting intrinsic SSC order is typically below 100 K. Current approaches to achieve near room…

We prepared very high-coercivity cobalt ferrite nanoparticles using short-time high-energy mechanical milling. After the milling process, the coercivity of the nanoparticles reached 3.75 kOe - a value almost five times higher than that…

介观与纳米尺度物理 · 物理学 2015-06-19 E. F. Chagas , A. S. Ponce , R. J. Prado , G. M. Silva , J. Bettini , E. Baggio-Saitovitch
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