Nonlinear effect of perpendicular magnetic field on the antiferromagnetic phase transition in weakly coupled layered systems: Equal access decoupling scheme

2004 ◽  
Vol 70 (1) ◽  
Author(s):  
H. Al-Wahsh ◽  
D. Bria ◽  
A. Akjouj ◽  
P. Zieliński
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Nonlinear Effect ◽  
Equal Access ◽  
Perpendicular Magnetic Field ◽  
Antiferromagnetic Phase ◽  
Layered Systems ◽  
Weakly Coupled

scholarly journals Намагниченность и гигантское магнетосопротивление поликристаллов TbSb при низких температурах

2019 ◽  
Vol 61 (8) ◽  
pp. 1470
Author(s):  
М.П. Волков ◽  
Н.Н. Степанов
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Antiferromagnetic Phase ◽  
Positive Magnetoresistance ◽  
The Magnetic Field

On the terbium antimonide TbSb polycrystals, the dependences of the magnetization M and the resistance R on the temperature T in the range of 2 ÷ 300 K and on the magnetic field H up to H = 14 T have been studied. On the dependences M (H) at each temperature, a feature (kink) was observed associated with the metamagnetic phase transition. Giant positive magnetoresistance of TbSb in the region of the antiferromagnetic phase has been found.

scholarly journals Topological gaps by twisting

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Matheus I. N. Rosa ◽  
Massimo Ruzzene ◽  
Emil Prodan
Keyword(s):  
Magnetic Field ◽  
Quantum Hall Effect ◽  
Twist Angle ◽  
Quantum Hall ◽  
Topological Phases ◽  
Edge States ◽  
Layered Systems ◽  
Virtual Laboratories ◽  
Higher Dimensional ◽  
Chern Numbers

AbstractTwisted bilayered systems such as bilayered graphene exhibit remarkable properties such as superconductivity at magic angles and topological insulating phases. For generic twist angles, the bilayers are truly quasiperiodic, a fact that is often overlooked and that has consequences which are largely unexplored. Herein, we uncover that twisted n-layers host intrinsic higher dimensional topological phases, and that those characterized by second Chern numbers can be found in twisted bi-layers. We employ phononic lattices with interactions modulated by a second twisted lattice and reveal Hofstadter-like spectral butterflies in terms of the twist angle, which acts as a pseudo magnetic field. The phason provided by the sliding of the layers lives on 2n-tori and can be used to access and manipulate the edge states. Our work demonstrates how multi-layered systems are virtual laboratories for studying the physics of higher dimensional quantum Hall effect, and can be employed to engineer topological pumps via simple twisting and sliding.

scholarly journals Manipulating the Raman scattering rotation via magnetic field in an MoS2 monolayer

RSC Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 4035-4041
Author(s):  
Yi Wan ◽  
Xing Cheng ◽  
Yanfang Li ◽  
Yaqian Wang ◽  
Yongping Du ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Raman Scattering ◽  
Perpendicular Magnetic Field ◽  
Mos2 Monolayer

Herein, we demonstrated that a perpendicular magnetic field could produce a dramatic scattering rotation for the vibrations in MoS2 monolayers.

scholarly journals Effects of Perpendicular Magnetic Field Annealing on the Structural and Magnetic Properties of [Co/Ni]2/PtMn Thin Films

2021 ◽  
Vol 7 (3) ◽  
pp. 38
Author(s):  
Roshni Yadav ◽  
Chun-Hsien Wu ◽  
I-Fen Huang ◽  
Xu Li ◽  
Te-Ho Wu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
Magnetic Properties ◽  
Photoelectron Spectroscopy ◽  
Perpendicular Magnetic Field ◽  
Face Centered Cubic ◽  
Lattice Image ◽  
X Ray ◽  
Field Annealing ◽  
Face Centered

In this study, [Co/Ni]2/PtMn thin films with different PtMn thicknesses (2.7 to 32.4 nm) were prepared on Si/SiO2 substrates. The post-deposition perpendicular magnetic field annealing (MFA) processes were carried out to modify the structures and magnetic properties. The MFA process also induced strong interlayer diffusion, rendering a less sharp interface between Co and Ni and PtMn layers. The transmission electron microscopy (TEM) lattice image analysis has shown that the films consisted of face-centered tetragonal (fct) PtMn (ordered by MFA), body-centered cubic (bcc) NiMn (due to intermixing), in addition to face-centered cubic (fcc) Co, Ni, and PtMn phases. The peak shift (2-theta from 39.9° to 40.3°) in X-ray diffraction spectra also confirmed the structural transition from fcc PtMn to fct PtMn after MFA, in agreement with those obtained by lattice images in TEM. The interdiffusion induced by MFA was also evidenced by the depth profile of X-ray photoelectron spectroscopy (XPS). Further, the magnetic properties measured by vibrating sample magnetometry (VSM) have shown an increased coercivity in MFA-treated samples. This is attributed to the presence of ordered fct PtMn, and NiMn phases exchange coupled to the ferromagnetic [Co/Ni]2 layers. The vertical shift (Mshift = −0.03 memu) of the hysteresis loops is ascribed to the pinned spins resulting from perpendicular MFA processes.

Dynamic resistance measurement in a YBCO wire under perpendicular magnetic field at various operating temperatures

2019 ◽  
Vol 126 (24) ◽  
pp. 243904 ◽  
Author(s):  
Yanchao Liu ◽  
Zhenan Jiang ◽  
G. Sidorov ◽  
C. W. Bumby ◽  
R. A. Badcock ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Resistance Measurement ◽  
Dynamic Resistance ◽  
Perpendicular Magnetic Field ◽  
Operating Temperatures
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