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Experimental above-barrier fusion cross-sections for $^{17}$F + $^{12}$C are compared to the fusion excitation functions for $^{16,18}$O, $^{19}$F, and $^{20}$Ne ions on a carbon target. In comparing the different systems both the differing…

Nuclear Experiment · Physics 2021-06-16 Varinderjit Singh , J. Vadas , T. K. Steinbach , B. B. Wiggins , S. Hudan , R. T. deSouza

Weyl semimetals, characterized by nodal points in the bulk and Fermi arc states on the surface, have recently attracted extensive attention due to the potential application on low energy consumption electronic materials. In this report, the…

Strongly Correlated Electrons · Physics 2019-07-08 W. Zhou , B. Li , C. Q. Xu , M. R. van Delft , Y. G. Chen , X. C. Fan , B. Qian , N. E. Hussey , Xiaofeng Xu

We study the tunneling magnetoresistance in the ensembles of ferromagnetic granules with random easy axes of magnetic anisotropy taking into account the exchange interaction between granules. It is shown that due to the exchange interaction…

Mesoscale and Nanoscale Physics · Physics 2020-12-15 Y. M. Beltukov , V. I. Kozub , A. V. Shumilin , N. P. Stepina

Electric control of N\'eel vector is a central task of antiferromagnetic (AFM) spintronics. The major scheme so far relies on the linear N\'eel torque, which however is restricted to AFMs with broken inversion symmetry. Here, we propose a…

Materials Science · Physics 2025-06-13 Jin Cao , Weikang Wu , Huiying Liu , Shen Lai , Cong Xiao , X. C. Xie , Shengyuan A. Yang

Neutron scattering has played a significant role in characterizing magnetic and structural correlations in Fe$_{1+y}$Te$_{1-x}$Se$_x$ and their connections with superconductivity. Here we review several key aspects of the physics of iron…

Superconductivity · Physics 2020-08-26 J. M. Tranquada , Guangyong Xu , I. A. Zaliznyak

The NaZn13 type itinerant magnet LaFe13-xSix has seen considerable interest due to its unique combination of large magnetocaloric effect and low hysteresis. Here we demonstrate, with a combination of magnetometry, bespoke microcalorimetry…

Strongly Correlated Electrons · Physics 2024-05-15 K. Morrison , J. J. Betouras , G. Venkat , R. A. Ewings , A. Caruana , K. Skokov , O. Gutfleisch , L. F. Cohen

We report the first experimental results of the magnetoresistance, Hall effect, and quantum Shubnikov-de Haas oscillations on single crystals of ZrTe, which was recently predicted to be a new type of topological semimetal hosting both…

Materials Science · Physics 2020-06-12 W. L. Zhu , J. B. He , S. Zhang , D. Chen , L. Shan , Z. A. Ren , G. F. Chen

We calculate the spin-transfer torque in Fe/MgO/Fe tunnel junctions and compare the results to those for all-metallic junctions. We show that the spin-transfer torque is interfacial in the ferromagnetic layer to a greater degree than in…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Christian Heiliger , M. D. Stiles

Metamagnetic transitions in single-crystal rare-earth nickel borocarbide HoNi$_2$B$_2$C have been studied at T\approx 1.9 K with a Quantum Design torque magnetometer. This compound is highly anisotropic with a variety of metamagnetic states…

Strongly Correlated Electrons · Physics 2011-11-10 K. D. D. Rathnayaka , B. I. Belevtsev , D. G. Naugle

We use inelastic neutron scattering to measure the magnetic fluctuations in a single crystal of the heavy fermion alloy CeCu_5.9Au_0.1 close to the antiferromagnetic quantum critical point. The energy and temperature-dependent spectra obey…

Strongly Correlated Electrons · Physics 2009-10-31 A. Schroder , G. Aeppli , E. Bucher , R. Ramazashvili , P. Coleman

We use neutron diffraction to probe the magnetization components of a crystal of Mn12 single-molecule magnets. Each of these molecules behaves, at low temperatures, as a nanomagnet with spin S = 10 and strong anisotropy along the…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 F. Luis , J. Campo , J. Gomez , G. J. McIntyre , J. Luzon , D. Ruiz-Molina

The structural and magnetic effects of non-magnetic vanadium (V) doping in helimagnetic SrFeO$_{3-\delta}$ (SFO) are investigated, focusing on up to 3% substitution at the Fe site. Structural analysis from X-ray diffraction (XRD) and Raman…

Neutron diffraction measurements on a high quality single crystal of CeAu2Ge2 reveal two new magnetic structures that coexist with commensurate long range antiferromagnetic order below the Neel temperature T_N ~ 14 K. The new magnetic…

Strongly Correlated Electrons · Physics 2012-09-03 D. K. Singh , A. Thamizhavel , J. W. Lynn , S. K. Dhar , T. Hermann

Indium selenide (In2Se3), a ferroelectric semiconductor, offers a unique platform for multifunctional nanoelectronics owing to the interplay between polarization dynamics, interlayer sliding, and structural polymorphism. Ferroelectric…

Using polarized and unpolarized neutron scattering we show that interstitial Fe in superconducting Fe_{1+y}Te_{1-x}Se_x induces a magnetic Friedel-like oscillation that diffracts at Q_(in-plane)=(1/2,0) and involves >50 neighboring Fe…

We argue that to explain recent resonant tunneling experiments on crystals of Mn$_{12}$ and Fe$_8$, particularly in the low-T limit, one must invoke dynamic nuclear spin and dipolar interactions. We show the low-$T$, short-time relaxation…

Condensed Matter · Physics 2009-10-30 Nikolai Prokof'ev , Philip Stamp

Mott physics is characterized by an interaction-driven metal-to-insulator transition in a partially filled band. In the resulting insulating state, antiferromagnetic orders of the local moments typically develop, but in rare situations no…

Nb and its compounds are widely used in quantum computing due to their high superconducting transition temperatures and high critical fields. Devices that combine superconducting performance and spintronic non-volatility could deliver…

The switching dynamics of a single-domain BiFeO3/CoFe heterojunction is modeled and key parameters such as interface exchange coupling coefficient are extracted from experimental results. The lower limit of the magnetic order response time…

Low-energy antiferromagnetic phase transitions offer an appealing platform for low-power spintronic functionalities, yet their direct electrical access in insulating antiferromagnets remains challenging, particularly in the low-field regime…

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