scholarly journals On the crustal bias of repeat stations in Romania

2013 ◽  
Vol 55 (6) ◽  
Author(s):  
Venera Dobrica ◽  
Crisan Demetrescu ◽  
Razvan Greculeasa ◽  
Anca Isac
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Curie Temperature ◽  
Magnetic Induction ◽  
Electromagnetic Induction ◽  
Reference Station ◽  
Lateral Variation ◽  
Field Campaigns ◽  
Induction Model ◽  
Geomagnetic Measurements

<p>A magnetic induction model has been applied to recordings obtained in 2010 during the field campaigns for geomagnetic measurements at the 26 repeat stations of the Romanian secular variation network. The model is based on the observation that a variable external magnetic field induces a response of the Earth's interior not only by electromagnetic induction, but also by magnetic induction in the magnetic rocks above the Curie temperature. The model computes coefficients of a linear relationship between recorded values of a certain geomagnetic element (X, Y, Z, or F) at the repeat station and recorded X, Y, Z values at a reference station (in this case, SUA observatory). Coefficients depend on magnetic permeabilities of rocks beneath the station and stand as a proxy for the anomaly bias characterizing the site. Maps of the lateral variation of this type of information were obtained and discussed.</p>

Magnetization and Curie Temperature of Ferromagnetic Ultrathin Films: The Influence of Magnetic Anisotropy and Dipolar Interactions (invited)

1991 ◽  
Vol 231 ◽  
Author(s):  
P. Bruno
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Curie Temperature ◽  
Magnetic Anisotropy ◽  
Long Range ◽  
Ultrathin Films ◽  
Experimental Results ◽  
Dipolar Interactions ◽  
Surface Gradient ◽  
Theoretical Investigations

AbstractTheoretical investigations of the magnetization and Curie temperature of ferromagnetic ultrathin films in the presence of magnetic anisotropy and long-range dipolar interactions are presented. The Curie temperature of fcc (001) cobalt ultrathin films is calculated and compared with experimental results on Co/Cu (001) films. The influence of an external magnetic field, and the surface gradient of the magnetization are also discussed.

scholarly journals Mathematical Model of the Process of Pallet Movement Along the Magnetic Type Centrifugal Brake Roller

2021 ◽  
Vol 346 ◽  
pp. 03009
Author(s):  
Ildar Sharifullin ◽  
Andrey Nosko ◽  
Yevgeniy Safronov
Keyword(s):  
Magnetic Field ◽  
Mathematical Model ◽  
Comparative Analysis ◽  
External Magnetic Field ◽  
Electromagnetic Induction ◽  
Eddy Currents ◽  
Disc Brake ◽  
Safe Operation ◽  
Magnetic Type ◽  
The Mathematical Model

One of the main elements of safe operation of gravity flow racks used in pallet racks is a brake roller. The most promising design is a centrifugal brake roller of magnetic (eddy current) type. The principle of operation of such rollers is based on the laws of electromagnetic induction and involves the deceleration of a conductor moving in a magnetic field, due to the interaction of eddy currents (or Foucault currents) arising in the volume of the conductor, with an external magnetic field. The mathematical model of the process of pallet movement along a centrifugal brake roller of magnetic type is developed in the article. The equation of the speed of movement of the pallet along the centrifugal brake roller of magnetic type is obtained. Comparative analysis of the speed of movement of a pallet along centrifugal and disc brake rollers of magnetic type is carried out.

scholarly journals Magnetic transition curves of supraconductors

1936 ◽  
Vol 155 (886) ◽  
pp. 613-628 ◽  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Induction ◽  
Longitudinal Magnetic Field ◽  
Magnetic Transition ◽  
Previous Treatment ◽  
Threshold Value ◽  
Reversible Process ◽  
Transition Curves

The experiments of Meissner and Ochsenfeld and others* have suggested that in a pure supraconducting body which has not the shape of a ring the magnetic induction B is always equal to zero, independently of the previous treatment and of the external magnetic field, provided the latter does not exceed the “threshold value”. Gorter and Casimir have given a thermodynamic treatment of the behaviour of a long-shaped supraconductor in a longitudinal magnetic field. This treatment is based on the assumption that the supraconductor is in thermal euilibrium, even if B = O in the interior in the presence of an external magnetic field, and that the perturbation of the supraconductivity on passing the threshold is a reversible process. These assumptions were made extremely plausible, if not certain, by the experiments mentioned above.

scholarly journals The effective susceptibility of a paramagnetic powder

1941 ◽  
Vol 178 (972) ◽  
pp. 86-92 ◽  
Keyword(s):  
Magnetic Field ◽  
Magnetic Material ◽  
External Magnetic Field ◽  
Curie Temperature ◽  
Temperature Scale ◽  
Preceding Paper ◽  
Theoretical Expression ◽  
Demagnetizing Field ◽  
Definition Of ◽  
Packed Powder

The effective susceptibility (that is, the magnetic moment divided by the external magnetic field) of a paramagnetic powder loosely packed into an ellipsoidal container has been measured against the vapour pressure of liquid helium, and hence, using the results of the preceding paper, against the susceptibility of the compact salt. The definition of the ‘Curie’ temperature scale is based on the latter, and it is found that the correction to be applied in calculating the Curie temperature from the effective susceptibility of the powder agrees with that given by a theoretical expression derived from Breit’s calculation of the demagnetizing field of a powder. This is of importance both in experiments using a loosely packed powder and in experiments using a paramagnetic powder mixed with a non-magnetic material.

RECOIL IMPLANTATION MÖSSBAUER EXPERIMENT ON 57Fe IN Ge IN THE PRESENCE OF AN EXTERNAL MAGNETIC FIELD

1980 ◽  
Vol 41 (C1) ◽  
pp. C1-445-C1-445
Author(s):  
G. Langouche ◽  
N. S. Dixon ◽  
L. Gettner ◽  
S. S. Hanna
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Recoil Implantation
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