Effect of Al on Structure, Magnetic, Resistivity, and Magnetoresistance Studies of Ba2FeMoO6

2020 ◽  
Vol 33 (7) ◽  
pp. 2101-2108
Author(s):  
G. Rajender ◽  
Y. Markandeya ◽  
Shashidhar Bale ◽  
K. Suresh ◽  
G. Bhikshamaiah
Keyword(s):  
Magnetic Resistivity

MAGNETIC RESISTIVITY IN Bi2Sr2Ca(Cu1-xCox)2Od EPITAXIAL THIN FILMS

2007 ◽  
Vol 21 (01) ◽  
pp. 127-132
Author(s):  
T. R. YANG ◽  
G. ILONCA ◽  
V. TOMA ◽  
P. BALINT ◽  
M. BODEA
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
Activation Energy ◽  
Glass Transition ◽  
Effective Activation Energy ◽  
Epitaxial Thin Films ◽  
Effective Activation ◽  
High Quality ◽  
Plastic Deformations ◽  
Magnetic Resistivity

The scaling behavior of the effective activation energy of high-quality epitaxial c-oriented Bi 2 Sr 2 Ca ( Cu 1-x Co x)2 O d thin films with 0≤x ≤0.025 has been studied as a function of temperature and magnetic field. For all samples, the effective activation energy scales as U(T, μoH)=Uo(1-T/T c )mHn with exponent m=1.25±0.03, n=-1/2 and the field scaling 1/μoH and -UμoH for thick films and ultra thin films, respectively. The results are discussed taking into account of the influence of the Co substitution with a model in which U(T, H) arises from plastic deformations of the viscous flux liquid above the vortex-glass transition temperature.

Integration of Geophysical Technologies in the Petroleum Industry

2021 ◽  
Keyword(s):  
Co2 Storage ◽  
Petroleum Industry ◽  
Petroleum Exploration ◽  
Reflection Seismology ◽  
Seismic Reflection Data ◽  
Reflection Data ◽  
Advanced Students ◽  
Storage Reservoirs ◽  
Magnetic Resistivity ◽  
Exploration And Production

The most utilized technique for exploring the Earth's subsurface for petroleum is reflection seismology. However, a sole focus on reflection seismology often misses opportunities to integrate other geophysical techniques such as gravity, magnetic, resistivity, and other seismicity techniques, which have tended to be used in isolation and by specialist teams. There is now growing appreciation that these technologies used in combination with reflection seismology can produce more accurate images of the subsurface. This book describes how these different field techniques can be used individually and in combination with each other and with seismic reflection data. World leading experts present chapters covering different techniques and describe when, where, and how to apply them to improve petroleum exploration and production. It also explores the use of such techniques in monitoring CO2 storage reservoirs. Including case studies throughout, it will be an invaluable resource for petroleum industry professionals, advanced students, and researchers.

Magnetic, resistivity and ESR studies of the compounds GdNi2Sb2 and GdCu2Sb2

1995 ◽  
Vol 147 (1-2) ◽  
pp. 81-90 ◽  
Author(s):  
K. Kaczmarska ◽  
J. Pierre ◽  
A. Guzik ◽  
A. Ṡlebarski
Keyword(s):  
Magnetic Resistivity

scholarly journals Long-term stability of the dead-zone in proto-planetary disks

2010 ◽  
Vol 6 (S276) ◽  
pp. 418-419
Author(s):  
Mario Flock ◽  
Neal Turner ◽  
Natalia Dzyurkevich ◽  
Hubert Klahr
Keyword(s):  
Dead Zone ◽  
Cosmic Ray ◽  
X Ray ◽  
Long Term Stability ◽  
Mhd Simulations ◽  
Magnetic Resistivity ◽  
Ideal Mhd ◽  
Self Consistent ◽  
Ionization Fraction

AbstractWe present 3D global non-ideal MHD simulations with a self consistent dynamic evolution of ionization fraction of the gas as result of reduced chemical network. We include X-ray ionization from the star as well as cosmic ray ionization. Based on local gas density and temperature in our chemical network, we determine the magnetic resistivity, which is fed back in MHD simulations. Parameters for dust size and abundance are chosen to have accreting layers and a laminar “dead” mid-plane.

scholarly journals Geophysical characterisation of two segments of the Møre-Trøndelag Fault Complex, Mid-Norway

2011 ◽  
Vol 3 (1) ◽  
pp. 159-186
Author(s):  
A. Nasuti ◽  
C. Pascal ◽  
J. Ebbing ◽  
J. F. Tønnesen
Keyword(s):  
Tectonic Evolution ◽  
Deep Structure ◽  
Normal Fault ◽  
Geophysical Data ◽  
Data Sets ◽  
Normal Faulting ◽  
The South ◽  
The Past ◽  
Magnetic Resistivity ◽  
Wide Zone

Abstract. The Møre-Trøndelag Fault Complex (MTFC) has controlled the tectonic evolution of Mid-Norway and its shelf for the past 400 Myr through repeated reactivations during Paleozoic, Mesozoic and perhaps Cenozoic times, the very last phase of reactivation involving normal to oblique slip faulting. Despite its pronounced signature in the landscape, its deep structure has remained unresolved until now. We focused on two specific segments of the MTFC (i.e. the so-called "Tjellefonna" and "Bæverdalen" faults) and acquired multiple geophysical data sets (i.e. gravity, magnetic, resistivity and shallow refraction profiles). A 100–200 m wide zone of gouge and/or brecciated bedrock dipping steeply to the south is interpreted as being the "Tjellefonna Fault" stricto sensu. The fault appears to be flanked by two additional but minor damage zones. A secondary normal fault also steeply dipping to the south but involving indurated breccias was detected ~1 km farther north. The "Bæverdalen Fault" is interpreted as a ~700 m wide and highly deformed zone involving fault gouge, breccias and lenses of intact bedrock, as such it is probably the most important fault segment in the studied area and accommodated most of the strain during presumably late Jurassic normal faulting. Our geophysical data are indicative of a "Bæverdalen Fault" dipping steeply towards the south, in agreement with the average orientation of the local tectonic grain. Our findings suggest that the influence of Mesozoic normal faulting along the MTFC on landscape development is more complex than previously anticipated.

Effect of Cobalt Substitution on Magnetic, Resistivity and Dielectric Properties of Nickel–Zinc Ferrite (CoxNix–0.5Zn0.5Fe2O4)

2019 ◽  
Vol 14 (9) ◽  
pp. 1344-1352 ◽  
Author(s):  
A. M. Afzal ◽  
Alina Manzoor ◽  
Muhammad Zubair Khan ◽  
M. F. Khan ◽  
Aftab Skindar ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Zinc Ferrite ◽  
Nickel Zinc ◽  
Cobalt Substitution ◽  
Magnetic Resistivity

scholarly journals ARCHAEOLOGICAL PROSPECTION IN SOUTHEASTERN PARÁ STATE, BRAZIL USING GEOPHYSICAL METHODS: A CASE STUDY OF SÍTIO DOMINGOS

2013 ◽  
Vol 31 (3) ◽  
pp. 515 ◽  
Author(s):  
José Gouvêa Luiz ◽  
Edithe Da Silva Pereira
Keyword(s):  
Ground Penetrating Radar ◽  
Geophysical Methods ◽  
Main Tool ◽  
Archaeological Site ◽  
Magnetic Anomalies ◽  
Archaeological Excavation ◽  
Archaeological Prospection ◽  
Magnetic Resistivity ◽  
Ground Penetrating

ABSTRACT. Magnetic, resistivity and ground-penetrating radar (GPR) methods were applied to Sítio Domingos, a Brazilian archaeological site located in Pará State, to find objects buried by an ancient civilization that may have inhabited the site. Archaeological excavations based on the locations of magnetic anomalies reveal a concentration of ceramic fragments and pots. The correlation between the resistivity models and the soil profile of the study area suggests that the resistivity range of 2000 to 2500 ohm-m represents the archaeological occupation layer. Several anomalous features detected by GPR are correlated with magnetic anomalies. However, when these features are analyzed independently of the magnetic anomalies, they do not conclusively represent the objects being searched. Therefore, GPR is not recommended as the main tool for archaeological prospection in the study area.Keywords: magnetometry, electrical resistivity, GPR, archaeological excavation. RESUMO. Os métodos magnético, resistividade e radar de penetração no solo (GPR) foram aplicados no Sítio Domingos, um sítio arqueológico brasileiro localizado no Estado do Pará, para encontrar objetos enterrados por uma civilização antiga que pode ter habitado a região. Escavações arqueológicas com base nos locais de anomalias magnéticas revelaram uma concentração de fragmentos de cerâmica e vasos. A correlação entre os modelos de resistividade e do perfil do solo da área de estudo sugere que a faixa de resistividade de 2000-2500 ohm-m representa a camada de ocupação arqueológica. V´arias feições anômalas detectadas pelo GPR são correlacionáveis com anomalias magnéticas. No entanto, quando essas feições são analisadas independente das anomalias magnéticas, elas não representam de forma conclusiva os objetos que est~so sendo procurados. Portanto, o GPR não é recomendado como a principal ferramenta de prospecção arqueológica na área de estudo.Palavras-chave: magnetometria, resistividade elétrica, GPR, escavação arqueológica.

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