scholarly journals Thickness-dependent magnetic order in CrI3 single crystals

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yu Liu ◽  
Lijun Wu ◽  
Xiao Tong ◽  
Jun Li ◽  
Jing Tao ◽  
...  
Keyword(s):  
Domain Walls ◽  
Magnetic Order ◽  
Magnetic Transition ◽  
Mean Field ◽  
Magnetic Domain ◽  
Crystal Thickness ◽  
Range Magnetic Order ◽  
Plane Field ◽  
Out Of Plane ◽  
Magnetic Domain Walls

Abstract Two-dimensional (2D) materials with intrinsic ferromagnetism provide unique opportunity to engineer new functionalities in nano-spintronics. One such material is CrI3, showing long-range magnetic order in monolayer with the Curie temperature (Tc) of 45 K. Here we study detailed evolution of magnetic transition and magnetic critical properties in response to systematic reduction in crystal thickness down to 50 nm. Bulk Tc of 61 K is gradually suppressed to 57 K, however, the satellite transition at T * = 45 K is observed layer-independent at fixed magnetic field of 1 kOe. The origin of T * is proposed to be a crossover from pinning to depinning of magnetic domain walls. The reduction of thickness facilitates a field-driven metamagnetic transition around 20 kOe with out-of-plane field, in contrast to the continuous changes with in-plane field. The critical analysis around Tc elucidates the mean-field type interactions in microscale-thick CrI3.

scholarly journals Magnetic characterization of cobalt nanowires and square nanorings fabricated by focused electron beam induced deposition

2018 ◽  
Vol 9 ◽  
pp. 1040-1049 ◽  
Author(s):  
Federico Venturi ◽  
Gian Carlo Gazzadi ◽  
Amir H Tavabi ◽  
Alberto Rota ◽  
Rafal E Dunin-Borkowski ◽  
...  
Keyword(s):  
Electron Beam ◽  
Domain Walls ◽  
Magnetic Moments ◽  
Magnetic Domain ◽  
Hysteresis Loops ◽  
Electron Holography ◽  
Magnetic Dipoles ◽  
Plane Field ◽  
Magnetic Domain Walls ◽  
Electron Beam Induced Deposition

The magnetic properties of nanowires (NWs) and square nanorings, which were deposited by focused electron beam induced deposition (FEBID) of a Co carbonyl precursor, are studied using off-axis electron holography (EH), Lorentz transmission electron microscopy (L-TEM) and magnetic force microscopy (MFM). EH shows that NWs deposited using beam energies of 5 and 15 keV have the characteristics of magnetic dipoles, with larger magnetic moments observed for NWs deposited at lower energy. L-TEM is used to image magnetic domain walls in NWs and nanorings and their motion as a function of applied magnetic field. The NWs are found to have almost square hysteresis loops, with coercivities of ca. 10 mT. The nanorings show two different magnetization states: for low values of the applied in-plane field (0.02 T) a horseshoe state is observed using L-TEM, while for higher values of the applied in-plane field (0.3 T) an onion state is observed at remanence using L-TEM and MFM. Our results confirm the suitability of FEBID for nanofabrication of magnetic structures and demonstrate the versatility of TEM techniques for the study and manipulation of magnetic domain walls in nanostructures.

In-plane field-driven crossover in the spin-torque mechanism acting on magnetic domain walls in Co/Ni

2015 ◽  
Vol 91 (6) ◽  
Author(s):  
Kohei Ueda ◽  
Kab-Jin Kim ◽  
Takuya Taniguchi ◽  
Takayuki Tono ◽  
Takahiro Moriyama ◽  
...  
Keyword(s):  
Domain Walls ◽  
Magnetic Domain ◽  
Spin Torque ◽  
Plane Field ◽  
Magnetic Domain Walls

scholarly journals Phase shifter based on voltage-controlled magnetic domain walls

AIP Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 075225
Author(s):  
Xiao Zhang ◽  
Chen Zhang ◽  
Chonglei Sun ◽  
Xiao Xu ◽  
Liuge Du ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Magnetic Domain Walls

scholarly journals Direct observation of the coherent precession of magnetic domain walls propagating along permalloy nanowires

2006 ◽  
Vol 3 (1) ◽  
pp. 21-25 ◽  
Author(s):  
Masamitsu Hayashi ◽  
Luc Thomas ◽  
Charles Rettner ◽  
Rai Moriya ◽  
Stuart S. P. Parkin
Keyword(s):  
Direct Observation ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Magnetic Domain Walls
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