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We report on the observation of spontaneously drifting coupled spin and quadrupolar density waves in the ground state of laser driven Rubidium atoms. These laser-cooled atomic ensembles exhibit spontaneous magnetism via light mediated…

Quantum Physics · Physics 2024-02-28 G. Labeyrie , J. G. M. Walker , G. R. M. Robb , R. Kaiser , T. Ackemann

We study properties of a helimagnetic thin film with quantum Heisenberg spin model by using the Green's function method. Surface spin configuration is calculated by minimizing the spin interaction energy. It is shown that the angles between…

Strongly Correlated Electrons · Physics 2015-06-23 H. T. Diep

We investigate the response of palladium-cobalt bi-layer thin films to hydrogen charging at atmospheric pressure for spintronic applications. We find that hydrogen absorption by the palladium layer results in the narrowing and shifting of…

Materials Science · Physics 2015-06-12 Crosby S. Chang , Mikhail Kostylev , Eugene Ivanov

The spin dependence of the photoelectron tunnel current from free standing GaAs films into out-of- plane magnetized Cobalt films is demonstrated. The measured spin asymmetry (A) resulting from a change in light helicity, reaches +/- 6%…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 D. Vu , H. F. Jurca , F. Maroun , P. Allongue , N. Tournerie , A. C. H. Rowe , D. Paget , S. Arscott , E. Peytavit

A single crystalline system typically stabilizes a unique state for spin ordering below a critical temperature. Certain materials exhibit multiple magnetic states, driven by structural phase transitions under varying thermodynamic…

We present magneto-photoluminescence measurements in a hybrid 2D semiconductor/ferromagnetic structure consisting of MoSe2/hBN/Ni. When the Nickel layer is magnetized, we observe circularly polarized photoluminescence of the trion peak in…

We describe a detailed study of the structural, magnetic, and magneto-transport properties of single-crystal, n-type, Mn-doped Bi2Te3 thin films grown by molecular beam epitaxy. With increasing Mn concentration, the crystal structure…

Circular dichroism (CD) observed by photoemission, being sensitive to the orbital and spin angular momenta of the electronic states, is a powerful probe of the nontrivial surface states of topological insulators, but the experimental…

Mesoscale and Nanoscale Physics · Physics 2017-05-30 C. -Z. Xu , Y. Liu , R. Yukawa , L. -X. Zhang , I. Matsuda , T. Miller , T. -C. Chiang

We report on spin atomistic calculations used to model static and dynamic magnetic properties of inhomogeneous ultrathin iron films. Active magnetic layers in next-generation spintronic devices are becoming so thin that they exhibit some…

The efficiency of evaporative cooling, which is used for the creation of a Bose Einstein condensate, depends strongly on the number of particles at the start of the evaporation. A high efficiency can be reached by filling the…

Atomic Physics · Physics 2009-11-11 K. M. R. van der Stam , A. Kuijk , R. Meppelink , J. M. Vogels , P. van der Straten

We present a systematic study of the magnetic properties of semiconducting ZnFe$_2$O$_4$ thin films fabricated by pulsed laser deposition at low and high oxygen partial pressure and annealed in oxygen and argon atmosphere, respectively. The…

Applied Physics · Physics 2020-10-28 Vitaly Zviagin , Chris Sturm , Pablo Esquinazi , Marius Grundmann , Rüdiger Schmidt-Grund

The ability to tune the competition between the in-plane and out-of-plane orientation of magnetization provides a means to construct thermal sensors with a sharp spin re-orientation transition at specific temperatures. We have observed such…

We have studied surface morphology and magnetic properties of Fe/MgO(001) films deposited at an angle varying between 0o and 60o with respect to the surface normal and with azimuth along the Fe[010] or the Fe[110] direction. Due to…

Materials Science · Physics 2009-11-13 Qing-feng Zhan , Chris Van Haesendonck , Stijn Vandezande , Kristiaan Temst

Superconductor/ferromagnet proximity effect has been studied for Pb/Co$_2$Cr$_{1-x}$Fe$_x$Al bilayers. Different substrate temperatures allowed us to prepare the Heusler alloy Co$_2$Cr$_{1-x}$Fe$_x$Al films with different degree of spin…

We conduct a comprehensive study of three different magnetic semiconductors, CrI$_3$, CrBr$_3$, and CrCl$_3$, by incorporating both few- and bi-layer samples in van der Waals tunnel junctions. We find that the interlayer magnetic ordering,…

Magnetic and magnetotransport properties of oriented polycrystalline Pr0.58Ca0.42MnO3 thin films prepared in flowing oxygen and air ambient has been investigated. The magnetic ground state of both the films is a frozen cluster glass. In the…

Materials Science · Physics 2014-08-14 Vasudha Agarwal , P. K. Siwach , G. D. Varma , V. P. S. Awana , A. K. Srivastava , H. K. Singh

We present a detailed study on the microscopic origin of magnetism in suspended and dielectrically embedded CrI$_3$ monolayer. To this end, we down-fold two distinct minimal generalized Hubbard models with different orbital basis sets from…

Strongly Correlated Electrons · Physics 2021-10-06 D. Soriano , A. N. Rudenko , M. I. Katsnelson , M. Rösner

We report a soft x-ray resonant magnetic scattering study of the spin configuration in multiferroic thin films of Co$_{0.975}$Ge$_{0.025}$Cr$_2$O$_4$ (Ge-CCO) and CoCr$_2$O$_4$ (CCO), under low- and high-magnetic fields, from 0.2 T up to…

Strongly Correlated Electrons · Physics 2021-02-24 N Ortiz Hernandez , S Parchenko , J R L Mardegan , M Porer , E Schierle , E Weschke , M Ramakrishnan , M Radovic , J A Heuver , B Noheda , N Daffe , J Dreiser , H. Ueda , U Staub

The reorientation transition of the magnetization of ferromagnetic films is studied on a microscopic basis within a Heisenberg spin model. Using a modified mean field formulation it is possible to calculate properties of magnetic thin films…

Statistical Mechanics · Physics 2009-10-31 A. Hucht , K. D. Usadel

MnBi$_2$Te$_4$ (MBT) thin films provide a unique material platform in which magnetism, topology, and magneto-optical (MO) response can be tuned through layer-thickness and relative spin alignments. In this work, using a low-energy coupled…

Mesoscale and Nanoscale Physics · Physics 2026-04-09 Shahid Sattar , Roman Stepanov , C. M. Canali