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The magnetic state and magnetic coupling of individual atoms in nanoscale structures relies on a delicate balance between different interactions with the atomic-scale surrounding. Using scanning tunneling microscopy, we resolve the…

介观与纳米尺度物理 · 物理学 2015-06-12 T. R. Umbach , M. Bernien , C. F. Hermanns , A. Krüger , V. Sessi , I. Fernandez-Torrente , P. Stoll , J. I. Pascual , K. J. Franke , W. Kuch

We calculate the angular dependence of the x-ray linear and circular dichroism at the $L_{2,3}$ edges of $\alpha$-Fe(II) Phthalocyanine (FePc) thin films using a ligand field model with full configuration interaction. We find the best…

强关联电子 · 物理学 2015-06-24 Javier Fernandez-Rodriguez , Brian Toby , Michel van Veenendaal

Combining density-functional theory calculations and microscopic tight-binding models, we investigate theoretically the electronic and magnetic properties of individual substitutional transition-metal impurities (Mn and Fe) positioned in…

材料科学 · 物理学 2014-04-18 M. R. Mahani , M. Fhokrul Islam , A. Pertsova , C. M. Canali

We have studied the magnetic properties of multilayers composed of ferromagnetic metal Co and heavy metals with strong spin orbit coupling (Pt and Ir). Multilayers with symmetric (ABA stacking) and asymmetric (ABC stacking) structures are…

A systematic study of magnetocrystalline anisotropy is performed for R(La/Ce/Nd)2Fe14B tetragonal compound with the site substitution mechanism. Theoretical calculation suggests the 50% doping with Ce at 4f-site can lead to competitive…

材料科学 · 物理学 2018-06-07 Rajiv K. Chouhan , Arjun K. Pathak , D. Paudyal , V. K. Pecharsky

We present a microscopic model for nanoparticles, of the maghemite ($\gamma $% -Fe$_{2}$O$_{3}$) type, and perform classical Monte Carlo simulations of their magnetic properties. On account of M\"{o}ssbauer spectroscopy and high-field…

材料科学 · 物理学 2009-10-31 H. Kachkachi , A. Ezzir , M. Nogues , E. Tronc

The magnetic characteristics for superconducting samples of different geometries (plates and films of various widths) and orientation with respect to external field are compared. A similarity is established between the magnetization curves…

超导电性 · 物理学 2007-05-23 G. M. Maksimova , D. Yu. Vodolazov , I. L. Maksimov

We perform fully relativistic first principles calculations of the exchange interactions and the magnetocrystalline anisotropy energy (MAE) in an Fe/FePt/Fe sandwich system in order to elucidate how the presence of Fe/FePt (soft/hard…

材料科学 · 物理学 2013-11-22 C J Aas , P J Hasnip , R Cuadrado , E M Plotnikova , L Szunyogh , L Udvardi , R W Chantrell

Electronic correlation can strongly influence the electronic properties of two-dimensional (2D) materials with open d- or f-orbitals. Herein, by taking single-layer (SL) H-FeBr$_2$ as a representative of the SL H-FeX$_2$ (X=Cl, Br, I)…

材料科学 · 物理学 2022-10-05 Weiyi Pan

The robustness of the gapless topological surface state hosted by a 3D topological insulator against perturbations of magnetic origin has been the focus of recent investigations. We present a comprehensive study of the magnetic properties…

By Monte Carlo simulations in the canonical ensemble, we have studied the magnetic anisotropy in Fe/Dy amorphous multilayers. This work has been motivated by experimental results which show a clear correlation between the magnetic…

材料科学 · 物理学 2008-07-09 Etienne Talbot , Pierre Emmanuel Berche , Denis Ledue

Magneto-plasticity occurs when a weak magnetic field alters material plasticity and offers a viable solution to enhance ductile-mode cutting of brittle materials. This study demonstrates the susceptibility of non-magnetic single-crystal…

材料科学 · 物理学 2021-11-17 Yunfa Guo , Yan Jin Lee , Yu Zhang , Anastassia Sorkin , Sergei Manzhos , Hao Wang

The strong perpendicular magnetic anisotropy of $L{\rm1_0}$-ordered FePt has been the subject of extensive studies for a long time. However, it is not known which element, Fe or Pt, mainly contributes to the magnetic anisotropy energy…

The electronic and magnetic properties of Mn coordinated to 1,2,4,5-tetracyanobenzene (TCNB) in the Mn-TCNB 2D metal-ligand networks have been investigated by combining scanning tunneling microscopy and X-ray magnetic circular dichroism…

We study the relaxation characteristics in the two-dimensional ($l^{}_x \times l^{}_y$) array of magnetic nanoparticles (MNPs) as a function of aspect ratio $A^{}_r=l^{}_y/l^{}_x$, dipolar interaction strength $h^{}_d$ and anisotropy axis…

材料科学 · 物理学 2021-06-29 Manish Anand

We have fabricated Fe(N) thin films with varied N2 partial pressure and studied the microstructure, morphology, magnetic properties and resistivity by using X-ray diffraction, atomic force microscopy, transmission electron microscopy,…

材料科学 · 物理学 2009-11-10 H. B. Nie , S. Y. Xu , C. K. Ong , Q. Zhan , D. X. Li , J. P. Wang

It have been demonstrated that the zigzag honeycomb nanoribbons exhibit an intriguing edge magnetism. Here the effect of the anisotropy on the edge magnetism in zigzag honeycomb nanoribbons is investigated by using two kinds of large-scale…

强关联电子 · 物理学 2019-05-21 Baoyue Li , Yifeng Cao , Lin Xu , Guang Yang , Zhi Ma , Miao Ye , Tianxing Ma

The magnetic anisotropy energy of Fe and Co monatomic nanowires both free-standing and at the step edge of a Pt surface is investigated within the framework of the density-functional theory and local-spin-density (LSDA) approximation.…

材料科学 · 物理学 2007-05-23 Matej Komelj Daniel Steiauf Manfred Faehnle

We studied the magnetic and transport properties of Co nanoparticles (NPs) being capped with varying amounts of Pt. Beside field and temperature dependent magnetization measurements we performed delta-M measurements to study the magnetic…

材料科学 · 物理学 2013-02-06 A. Ludwig , L. Agudo , G. Eggeler , A. Ludwig , A. D. Wieck , O. Petracic

A magneto-optically active thin film of Rb$_{j}$Co$_{k}$[Fe(CN)$_{6}$]$_{l}$ $\cdot$$n$H$_{2}$O has been prepared using a sequential assembly method. Upon irradiation with light and at 5 K, the net magnetization of the film increased when…

其他凝聚态物理 · 物理学 2016-08-16 J. -H. Park , E. Čižmár , M. W. Meisel , Y. D. Huh , F. Frye , S. Lane , D. R. Talham