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Motivated by the possible mechanism for the pinning of the electronic liquid crystal direction in YBCO as proposed in \cite{Pardini08}, we use the first principles Monte Carlo method to study the spin 1/2 Heisenberg model with…

强关联电子 · 物理学 2013-05-29 F. J. Jiang , F. Kämpfer , M. Nyfeler

The magneto-crystalline anisotropy (MCA) of (Ga,Mn)As films has been studied on the basis of ab-initio electronic structure theory by performing magnetic torque calculations. An appreciable contribution to the in-plane uniaxial anisotropy…

材料科学 · 物理学 2015-05-30 S. Mankovsky , S. Polesya , S. Bornemann , J. Minár , F. Hoffmann , C. H. Back , H. Ebert

A detailed nanoscale structural characterization was performed on high-quality La0.66Sr0.33MnO3 (LSMO) thin films of different thicknesses and deposited by pulsed laser deposition onto buffered Si (100) substrates. A multilayered structure…

材料科学 · 物理学 2020-09-16 Aneely Carrero , Augusto Roman , Myriam Aguirre , Laura B. Steren

We report magneto-crystalline anisotropy (MCA) calculations of Fe, Co and Ni slabs of various thicknesses and crystallographic orientations from two Density Functional Theory codes based either on a plane wave or a local atomic basis set…

材料科学 · 物理学 2020-01-08 Ludovic Le Laurent , Cyrille Barreteau , Troel Markussen

Iron-based layered systems are of great interest because of their ability to tune effective material parameters such as magnetic anisotropy energy (MAE). The influence of the crystallographic structure of Fe, its thickness, and the presence…

材料科学 · 物理学 2023-12-05 Joanna Marciniak , Mirosław Werwiński , Justyna Rychły-Gruszecka

Understanding and controlling the interfacial magnetic properties of ferromagnetic thin films are crucial for spintronic device applications. However, using conventional magnetometry, it is difficult to detect them separately from the bulk…

材料科学 · 物理学 2017-06-21 Le Duc Anh , Noboru Okamoto , Munetoshi Seki , Hitoshi Tabata , Masaaki Tanaka , Shinobu Ohya

By performing systematic $ab$ $initio$ density functional calculations, here we study two relativity-induced properties of atomically thin ferromagnetic (FM) Cr$_2$Ge$_2$Te$_6$ films [monolayer (ML), bilayer (BL) and trilayer (TL) as well…

介观与纳米尺度物理 · 物理学 2018-09-25 Yimei Fang , Shunqing Wu , Zi-Zhong Zhu , Guang-Yu Guo

The magnetic properties of Fe$_2$Ta and Fe$_2$W in the hexagonal Laves phase are computed using density functional theory in the generalised gradient approximation, with the full potential linearised augmented plane wave method. The alloy…

材料科学 · 物理学 2017-08-23 Alexander Edström

Colossal magnetoresistive (CMR) La$_{0.7}$Sr$_{0.3}$MnO$_{3}$ (LSMO) thin films have been grown under tensile strains on (100)-SrTiO$_{3}$ substrates and compressive strains on (100)-LaAlO$_{3}$ and (110)-NdGaO$_{3}$ substrates by pulsed…

材料科学 · 物理学 2016-08-31 R. Desfeux , S. Bailleul , A. Da Costa , W. Prellier , A. M. Haghiri-Gosnet

Simultaneous control of magnetic anisotropy and magnetoresistance, especially with atomic scale precision, remains a pivotal challenge for realizing advanced spintronic functionalities. Here we demonstrate cooperative continuous control…

材料科学 · 物理学 2024-03-04 Sheng Li , Zengxing Lu , Bin Lao , Xuan Zheng , Guoxin Chen , Run-Wei Li , Zhiming Wang

The nature of low-impurity ferromagnetism remains a challenging problem in the solid-state community due to the strong dependence of magnetic properties on composition, concentration, and structural geometry of diluted alloys. To address…

Rare earth (RE)-free permanent magnets, as alternative substitutes for RE-containing magnets for sustainable energy technologies and modern electronics, have attracted considerable interest. We performed a comprehensive search for new hard…

材料科学 · 物理学 2025-07-01 Weiyi Xia , Maxim Moraru , Ying Wai Li , Timothy Liao , James R. Chelikowsky , Cai-Zhuang Wang

Earlier a magnetic anisotropy for magnetic impurities nearby the surface of non-magnetic host was proposed in order to explain the size dependence of the Kondo effect in dilute magnetic alloys. Recently Giordano has measured the…

强关联电子 · 物理学 2007-05-23 L. Borda , A. Zawadowski

In this work, we study the anisotropic magnetoresistance (AMR) behavior of [001] epitaxial Fe65Co35 thin films along different crystallographic directions as a function of temperature. The AMR ratio is found to strongly depend on the…

We have explored the possibility to orient spins in antiferromagnetic thin films with low magnetocrystalline anisotropy via the exchange coupling to adjacent antiferromagnetic films with high magnetocrystalline anisotropy. We have used MnO…

The dynamic process of assisted magnetic switchins has been simulated to investigate the associated physics. The model uses a Voronoi construction to determine the physical structure of the nano granular thin film recording media; and the…

材料科学 · 物理学 2019-05-21 Lewis J. Atkinson , Richard F. L. Evans , Roy W. Chantrell

Understanding the magnetic anisotropy at ferromagnetic metal/oxide interface is a fundamental and intriguing subject. Here we propose an approach to manipulate the strength of perpendicular magnetic anisotropy (PMA) by varying MgO thickness…

材料科学 · 物理学 2014-12-05 T. Zhu , P. Chen , Q. H. Zhang , R. C. Yu , B. G. Liu

We have constructed an analytic formula to treat the perpendicular magnetic anisotropy energy in ferromagnetic metals with low symmetry, such as C4V and C3V. We find that the anisotropy energy is proportional to a part of the expectation…

材料科学 · 物理学 2019-03-27 Yoshishige Suzuki , Shinji Miwa

The magnetic domain structure is studied in epitaxial Fe$_{100-x}$Ga$_x$/MgO(001) films with 0 $<$ x $<$ 30 and thicknesses below 60 nm by magnetic force microscopy. For low gallium content, domains with the magnetization lying in the film…

材料科学 · 物理学 2019-07-31 Adrián Begué , Maria Grazia Proietti , José I. Arnaudas , Miguel Ciria

The magnetocrystalline anisotropy energy $E_{anis}$ for a monolayer of Fe and Ni is determined using a fully convergent tight-binding calculation including $s$-$d$ hybridization. The spin-orbit interaction $\lambda_{so}$ is treated…

凝聚态物理 · 物理学 2016-08-31 T. H. Moos , W. Hübner , K. H. Bennemann