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Optimally doped single crystals of Ba(Fe$_{1-x}$T$_x$)$_2$As$_2$ (T=Co, Ni) were irradiated with 1.4 GeV $^{208}$Pb$^{56+}$ ions at fluences corresponding to matching fields of $B_{\phi}=0.1, 0.5, 1$ and 2 T. Magneto-optical imaging has…

Superconductivity · Physics 2010-03-15 R. Prozorov , M. A. Tanatar , B. Roy , N. Ni , S. L. Bud'ko , P. C. Canfield , J. Hua , U. Welp , W. K. Kwok

Combining multiple degrees of freedom in strongly-correlated materials such as transition-metal oxides would lead to fascinating magnetic and magnetocaloric features. Herein, the strain effects are used to markedly tailor the magnetic and…

The microscopic origin of laser-induced ultrafast demagnetization remains an open question, to which the non-thermal electronic distribution plays a vital role at the initial stage. Herein, we investigate the connection between the…

Materials Science · Physics 2025-12-25 Yu-Hui Song , Huan-Cheng Yang , Kai Liu , Zhong-Yi Lu

Ultrafast spin dynamics in a magnetically compensated rare earth iron garnet film driven by femtosecond optical pulses through the inverse Faraday effect is theoretically investigated. Numerical simulations based on the equations of motion…

Materials Science · Physics 2026-05-15 N. I. Gribova , D. O. Ignatyeva , N. A. Gusev , A. K. Zvezdin , V. I. Belotelov

We report on measurements of magnetic field and temperature dependence of antiferromagnetic resonances in the prototypical antiferromagnet NiO. The frequencies of the magnetic resonances in the vicinity of 1 THz have been determined in the…

Materials Science · Physics 2018-06-22 Zhe Wang , S. Kovalev , N. Awari , Min Chen , S. Germanskiy , B. Green , J. -C. Deinert , T. Kampfrath , J. Milano , M. Gensch

We study the underlying chemical, electronic and magnetic properties of a number of magnetite based thin films. The main focus is placed onto NiO/Fe$_3$O$_4$(001) bilayers grown on MgO(001) and Nb-SrTiO$_3$(001) substrates. We compare the…

Raman spectroscopy is utilized to study the magnetic characteristics of heteroepitaxial NiO thin films grown by plasma-assisted molecular beam epitaxy on MgO(100) substrates. For the determination of the N\'eel temperature, we demonstrate a…

Materials Science · Physics 2020-07-24 J. Feldl , M. Budde , C. Tschammer , O. Bierwagen , M. Ramsteiner

A variety of emergent phenomena has been enabled by interface engineering in the complex oxides heterostructures. While extensive attention has been attracted to LaMnO3 (LMO) thin films for observing the control of functionalities at its…

The understanding of how spins move at pico- and femtosecond time scales is the goal of much of modern research in condensed matter physics, with implications for ultrafast and more energy-efficient data storage. However, the limited…

Epitaxial strain provides important pathways to control the magnetic and electronic states in transition metal oxides. However, the large strain is usually accompanied by a strong reduction of the oxygen vacancy formation energy, which…

Free-standing thin films of magnetic ion intercalated transition metal dichalcogenides are produced using ultramicrotoming techniques. Films of thicknesses ranging from 30nm to 250nm were achieved and characterized using transmission…

Materials Science · Physics 2020-12-02 Th. Danz , Q. Liu , X. D. Zhu , L. H. Wang , S. W. Cheong , I. Radu , C. Ropers , R. I. Tobey

We present here experimental results obtained on Bi2FeCrO6 (BFCO) epitaxial films deposited by laser ablation directly on SrTiO3 substrates. It has been theoretically predicted, by Baettig and Spaldin, using first-principles density…

Materials Science · Physics 2009-11-11 Riad Nechache , Catalin Harnagea , Louis-Philippe Carignan , David Menard , Alain Pignolet

The structure and static magnetic properties - saturation magnetization, perpendicular anisotropy, spectroscopic g-factor, and orbital magnetization - of thin-film 3d transition metal alloys are determined over the full range of alloy…

By means of photoemission and x-ray absorption spectroscopy, we have studied the electronic structure of (Ni,Zn,Fe,Ti)$_{3}$O$_{4}$ thin films, which exhibits a cluster glass behavior with a spin-freezing temperature $T_f$ of $\sim 230$ K…

In this work, the results of fabricating ultra thin VO$_2$ films on the technologically relevant amorphous SiO$_2$ surface using reactive DC magnetron sputtering are presented. Results indicate that a post deposition anneal in low partial…

Materials Science · Physics 2016-08-16 Fangfang Song , B. E. White

The quaternary full Heusler compound Mn(2-x)Co(x)VAl with x = 1 is predicted to be a half-metallic antiferromagnet. Thin films of the quaternary compounds with x = 0...2 were prepared by DC and RF magnetron co-sputtering on heated MgO (001)…

Materials Science · Physics 2011-07-01 Markus Meinert , Jan-Michael Schmalhorst , Günter Reiss , Elke Arenholz

Recent investigations have advanced the understanding of how structure-property relationships in ferromagnetic metal alloys affect the magnetization dynamics on nanosecond time-scales. A similar understanding for magnetization dynamics on…

Materials Science · Physics 2021-07-27 Ramya Mohan , Victor H. Ortiz , Luat Vuong , Sinisa Coh , Richard B. Wilson

Co2FeAl (CFA) thin films with thickness varying from 10 nm to 115 nm have been deposited on MgO(001) substrates by magnetron sputtering and then capped by Ta or Cr layer. X-rays diffraction (XRD) revealed that the cubic $[001]$ CFA axis is…

We used femtosecond optical pump-probe spectroscopy to study the photoinduced change in reflectivity of thin films of the electron-doped cuprate La$_{2-x}$Ce$_x$CuO$_4$ (LCCO) with dopings of x$=$0.08 (underdoped) and x$=$0.11 (optimally…

Superconductivity · Physics 2017-03-16 I. M. Vishik , F. Mahmood , Z. Alpichshev , J. Higgins , R. L. Greene , N. Gedik

Using an ultrashort laser pulse we explore {\it ab-initio} the spin dynamics of Gd$_x$(FeCo)$_{1-x}$ at femtosecond time scales. Optical excitations are found to drive charge from Fe majority $d$-states to the unoccupied Gd $f$-minority…

Materials Science · Physics 2022-02-16 J. K. Dewhurst , Sam Shallcross , I. E. Radu , P. Elliott , C. v. Korff Schmising , S. Sharma