Giant magnetic anisotropy of a two-dimensional metal–dicyanoanthracene framework

Nanoscale ◽  
2018 ◽  
Vol 10 (36) ◽  
pp. 17335-17340 ◽  
Author(s):  
Yun Zhang ◽  
Zhao Wei ◽  
Meiguang Zhang ◽  
Xiao Gu ◽  
Li Huang
Keyword(s):  
Magnetic Anisotropy ◽  
Easy Axis ◽  
Two Dimensional ◽  
2D Ir

A huge MAE up to 180 meV is found in a 2D Ir–DCA framework with the easy axis perpendicular to the sheet.

scholarly journals Correlation-driven eightfold magnetic anisotropy in a two-dimensional oxide monolayer

2020 ◽  
Vol 6 (15) ◽  
pp. eaay0114 ◽  
Author(s):  
Zhangzhang Cui ◽  
Alexander J. Grutter ◽  
Hua Zhou ◽  
Hui Cao ◽  
Yongqi Dong ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Easy Axis ◽  
Uniaxial Anisotropy ◽  
Spin Reorientation ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Orbital Ordering ◽  
Magnetic Easy Axis ◽  
Spin Orbit Interactions ◽  
Spin Switching

Engineering magnetic anisotropy in two-dimensional systems has enormous scientific and technological implications. The uniaxial anisotropy universally exhibited by two-dimensional magnets has only two stable spin directions, demanding 180° spin switching between states. We demonstrate a previously unobserved eightfold anisotropy in magnetic SrRuO3 monolayers by inducing a spin reorientation in (SrRuO3)1/(SrTiO3)N superlattices, in which the magnetic easy axis of Ru spins is transformed from uniaxial 〈001〉 direction (N < 3) to eightfold 〈111〉 directions (N ≥ 3). This eightfold anisotropy enables 71° and 109° spin switching in SrRuO3 monolayers, analogous to 71° and 109° polarization switching in ferroelectric BiFeO3. First-principle calculations reveal that increasing the SrTiO3 layer thickness induces an emergent correlation-driven orbital ordering, tuning spin-orbit interactions and reorienting the SrRuO3 monolayer easy axis. Our work demonstrates that correlation effects can be exploited to substantially change spin-orbit interactions, stabilizing unprecedented properties in two-dimensional magnets and opening rich opportunities for low-power, multistate device applications.

Magnetic Anisotropy in Electrodeposited CO Films and spin-valves on Gaas Substrates

1999 ◽  
Vol 562 ◽  
Author(s):  
K. Attenborough ◽  
M. Cerisier ◽  
H. Boeve ◽  
J. De Boeck ◽  
G. Borghs ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Buffer Layer ◽  
Structural Properties ◽  
Easy Axis ◽  
Spin Valve ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cu Films ◽  
Gaas Substrates ◽  
Unique Spin

ABSTRACTWe have studied the magnetic and structural properties of thin electrodeposited Co and Cu layers grown directly onto (100) n-GaAs and have investigated the influence of a buffer layer. A dominant fourfold anisotropy with a uniaxial contribution is observed in 10 nm Co electrodeposited films on GaAs. An easy axis is observed in the [001] GaAs direction with two hard axes of differing coercivities parallel to the [011] and [011] directions. For thicker films the easy axes in the [001] direction becomes less pronounced and the fourfold anisotropy becomes less dominant. Co films of similar thicknesses deposited onto an electrodeposited Cu buffer layer were nearly isotropic. From X-ray diffraction 21 nm Co layers on GaAs were found to be hcp with the c-axis tending to be in the plane of the film. The anisotropy is ascribed to the Co/GaAs interface and is held responsible for the unique spin-valve properties seen recently in electrodeposited Co/Cu films.

Two-dimensional ultrafast vibrational spectroscopy of azides in ionic liquids reveals solute-specific solvation

2015 ◽  
Vol 17 (40) ◽  
pp. 26575-26579 ◽  
Author(s):  
Samrat Dutta ◽  
Zhe Ren ◽  
Thomas Brinzer ◽  
Sean Garrett-Roe
Keyword(s):  
Ionic Liquids ◽  
Vibrational Spectroscopy ◽  
Two Dimensional ◽  
Specific Solvation ◽  
2D Ir ◽  
Ir Studies ◽  
Ultrafast Vibrational Spectroscopy

2D-IR studies of organic and inorganic azides dissolved in ionic liquids show different solvation structures and picosecond dynamics.

Large four-fold magnetic anisotropy in two-dimensional modulated Ni80Fe20 films

2015 ◽  
Vol 107 (23) ◽  
pp. 232402 ◽  
Author(s):  
G. N. Kakazei ◽  
X. M. Liu ◽  
J. Ding ◽  
V. O. Golub ◽  
O. Y. Salyuk ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Two Dimensional

scholarly journals Strain-induced perpendicular magnetic anisotropy and Gilbert damping of Tm3Fe5O12 thin films

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Oana Ciubotariu ◽  
Anna Semisalova ◽  
Kilian Lenz ◽  
Manfred Albrecht
Keyword(s):  
Film Thickness ◽  
Magnetic Anisotropy ◽  
Tensile Strain ◽  
Easy Axis ◽  
Perpendicular Magnetic Anisotropy ◽  
Gilbert Damping ◽  
Sample Plane ◽  
Iron Garnets ◽  
Out Of Plane ◽  
Magnetic Easy Axis

AbstractIn the attempt of implementing iron garnets with perpendicular magnetic anisotropy (PMA) in spintronics, the attention turned towards strain-grown iron garnets. One candidate is Tm3Fe5O12 (TmIG) which possesses an out-of-plane magnetic easy axis when grown under tensile strain. In this study, the effect of film thickness on the structural and magnetic properties of TmIG films including magnetic anisotropy, saturation magnetization, and Gilbert damping is investigated. TmIG films with thicknesses between 20 and 300 nm are epitaxially grown by pulsed laser deposition on substituted-Gd3Ga5O12(111) substrates. Structural characterization shows that films thinner than 200 nm show in-plane tensile strain, thus exhibiting PMA due to strain-induced magnetoelastic anisotropy. However, with increasing film thickness a relaxation of the unit cell is observed resulting in the rotation of the magnetic easy axis towards the sample plane due to the dominant shape anisotropy. Furthermore, the Gilbert damping parameter is found to be in the range of 0.02 ± 0.005.

scholarly journals Rational Electrostatic Design of Easy-Axis Magnetic Anisotropy in a ZnII-DyIII-ZnIISingle-Molecule Magnet with a High Energy Barrier

2014 ◽  
Vol 20 (44) ◽  
pp. 14262-14269 ◽  
Author(s):  
Itziar Oyarzabal ◽  
José Ruiz ◽  
José Manuel Seco ◽  
Marco Evangelisti ◽  
Agustín Camón ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Energy Barrier ◽  
Easy Axis ◽  
High Energy ◽  
High Energy Barrier

Magnetic Anisotropy Switch: Easy Axis to Easy Plane Conversion and Vice Versa

2018 ◽  
Vol 28 (32) ◽  
pp. 1801846 ◽  
Author(s):  
Mauro Perfetti ◽  
Mikkel A. Sørensen ◽  
Ursula B. Hansen ◽  
Heiko Bamberger ◽  
Samuel Lenz ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Easy Axis ◽  
Easy Plane

A polarization propagation mechanism of Fe and Cu atoms co-doped in two-dimensional-Si3N4

2020 ◽  
Vol 44 (33) ◽  
pp. 14082-14086
Author(s):  
Weili Li ◽  
Zhengxin Yan ◽  
Xiaowei Zhai ◽  
Li Chen ◽  
Wei Liu ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Spin Polarization ◽  
Propagation Mechanism ◽  
Two Dimensional ◽  
Honeycomb Structures ◽  
Co Doped

Fe and Cu atoms doped into two dimensional (2D) Si3N4 honeycomb structures exhibit magnetic anisotropy, and planar spin-polarization propagation.

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