scholarly journals Magnetic molecules as sensors of topological hysteresis of superconductors

2022 ◽  
Author(s):  
Giulia Serrano ◽  
Lorenzo Poggini ◽  
Giuseppe Cucinotta ◽  
Andrea Sorrentino ◽  
Niccolò Giaconi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Intermediate State ◽  
Spin Injection ◽  
Single Layer ◽  
Thin Layers ◽  
Local Magnetic Field ◽  
Field Variation ◽  
Magnetic Field Variation ◽  
Magnetic Molecules ◽  
The Magnetic Field

Abstract Superconductors and magnetic materials, including molecules, are key ingredients for quantum and advanced spintronic applications. However, only a little is known about how these materials are mutually influenced at their interface in hybrid architectures. Here, we show that a single layer of magnetic molecules, the Terbium(III) bis-phthalocyaninato (TbPc2) complexes, deposited on a superconducting Pb(111) surface is sensitive to the topology of the intermediate state of the superconductor, namely to the presence and evolution of superconducting and normal domains due to the magnetic field screening and penetration. The evidence of this sensitivity is found in the magnetisation dynamics of the TbPc2 sub-monolayer in its paramagnetic regime showing the fingerprint of the topological hysteresis of the superconducting substrate. This study reveals the great potentialities hold by thin layers of magnetic molecules for sensing local magnetic field variation in hybrid molecular/superconductor architectures, including spin resonators or spin injection devices for spintronics applications.

On the Configuration of the Magnetic Field of β CrB

1976 ◽  
Vol 32 ◽  
pp. 613-622
Author(s):  
I.A. Aslanov ◽  
Yu.S. Rustamov
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Radial Velocity ◽  
Magnetic Field Strength ◽  
Complex Shape ◽  
Rotation Period ◽  
Field Variation ◽  
Magnetic Field Variation ◽  
Secular Variations ◽  
The Magnetic Field

SummaryMeasurements of the radial velocities and magnetic field strength of β CrB were carried out. It is shown that there is a variability with the rotation period different for various elements. The curve of the magnetic field variation measured from lines of 5 different elements: FeI, CrI, CrII, TiII, ScII and CaI has a complex shape specific for each element. This may be due to the presence of magnetic spots on the stellar surface. A comparison with the radial velocity curves suggests the presence of a least 4 spots of Ti and Cr coinciding with magnetic spots. A change of the magnetic field with optical depth is shown. The curve of the Heffvariation with the rotation period is given. A possibility of secular variations of the magnetic field is shown.

Forced Dynamics of an Orbiting Conducting Tether

2001 ◽  
Author(s):  
Monica Pasca
Keyword(s):  
Magnetic Field ◽  
Equilibrium Configuration ◽  
Forced Oscillations ◽  
Local Magnetic Field ◽  
Orbital Energy ◽  
Gravity Gradient ◽  
Field Variation ◽  
Drag Forces ◽  
Mechanical Models ◽  
The Magnetic Field

Abstract Orbiting electrodynamic tethered systems are subjected not only to the gravity gradient but also to the electromagnetic drag forces that are generated by the interaction of the current flowing in the tether with the local magnetic field, according to the Lorentz law. This feature makes it possible to think of using such a system in order to de-orbit a satellite at the end of its life, taking advantage of the orbital energy lost in producing electric power. The configuration of such a system is deeply discussed in this paper with reference to a parametric analysis based on two different mechanical models, both of them considering the tether mass and elasticity and an electric current generated at one end that interact with the Earth’s ionosphere. The magnetic field variation along the orbit is considered, giving raise to forced oscillations of the system around its equilibrium configuration.

Leakage magnetic field variation induced by inner surface grooves during loading in geomagnetic environment

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1531-1538
Author(s):  
Bin Hu ◽  
Tao Yun Li ◽  
GongTian Shen ◽  
Benli Wan
Keyword(s):  
Magnetic Field ◽  
Outer Surface ◽  
Field Variation ◽  
Magnetic Field Variation ◽  
Leakage Magnetic Field ◽  
Inner Surface ◽  
Surface Groove ◽  
The Magnetic Field

The leakage magnetic field which induced by the inner surface groove during loading had been measured from the outer surface in geomagnetic environment. Compared the variation of the leakage magnetic field along the load with the location and development of the groove, it was found that two phenomena are relate to the magnetic field aberration. The relation can be described by the pink-pink value and the gradient of the magnetic field aberration. This result can be used to evaluate and monitor the inner defect by the magnetic field aberration characters.

Characterization of Stress-Induced Residual Magnetic Field in Ferromagnetic Steels

2015 ◽  
Author(s):  
Sheng Bao ◽  
Li Lin ◽  
Da Zhang ◽  
Meili Fu
Keyword(s):  
Magnetic Field ◽  
Tensile Tests ◽  
Field Variation ◽  
Magnetic Field Variation ◽  
Magnetic Curve ◽  
Ferromagnetic Steels ◽  
Different Characteristics ◽  
The Impact ◽  
Magnetic Field Variations ◽  
The Magnetic Field

In this research, tensile tests of three different steels were carried out to characterize the variation of the residual magnetic signals. To reduce the impact of initial magnetic field, all of the specimens were demagnetized before loaded. It was observed that the variations of magnetic signals along the surface of these steels demonstrate different characteristics both in the elastic and plastic stages. In the elastic stage, the magnetic field variation of Q235 and 45# steels had a nonlinear relationship with the applied stress and a simple linear relationship between stress and magnetic field appeared in Q345 steel. In the plastic stage, the magnetic field variation of Q235 was very complex and the magnetic field variations of Q345 and 45# steels demonstrated a process of systematic evolution. In addition, there existed a local dent of the magnetic curve in the necking position of the sample. When the sample was finally ruptured, one may evaluate the fracture position according to the features of the magnetic curve. Possible reasons were given for the different characteristics of magnetic field variations in different steels.

scholarly journals Effects of the magnetic field variation on the spin wave interference in a magnetic cross junction

AIP Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 056619 ◽  
Author(s):  
M. Balynskiy ◽  
H. Chiang ◽  
A. Kozhevnikov ◽  
G. Dudko ◽  
Y. Filimonov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Wave ◽  
Field Variation ◽  
Magnetic Field Variation ◽  
Wave Interference ◽  
The Magnetic Field

Effect of magnetic field on parametrically driven surface waves

2006 ◽  
Vol 463 (2079) ◽  
pp. 711-722 ◽  
Author(s):  
Supriyo Paul ◽  
Krishna Kumar
Keyword(s):  
Magnetic Field ◽  
Surface Waves ◽  
Liquid Metals ◽  
Tricritical Point ◽  
Thin Layers ◽  
Vertical Magnetic Field ◽  
Harmonic Solution ◽  
Chandrasekhar Number ◽  
The Magnetic Field ◽  
Primary Instability

Stability analysis of parametrically driven surface waves in liquid metals in the presence of a uniform vertical magnetic field is presented. Floquet analysis gives various subharmonic and harmonic instability zones. The magnetic field stabilizes the onset of parametrically excited surface waves. The minima of all the instability zones are raised by a different amount as the Chandrasekhar number is raised. The increase in the magnetic field leads to a series of bicritical points at a primary instability in thin layers of a liquid metal. The bicritical points involve one subharmonic and another harmonic solution of different wavenumbers. A tricritical point may also be triggered as a primary instability by tuning the magnetic field.

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