Magnetic Properties of Superconducting GdBa2Cu3O6+δat Low Temperature and High Field

1987 ◽  
Vol 99 ◽  
Author(s):  
C. Y. Huang ◽  
Y. Shapira ◽  
P. H. Hor ◽  
R. L. Meng ◽  
C. W. Chu
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Magnetic Properties ◽  
Low Temperature ◽  
Temperature Dependence ◽  
High Field ◽  
Spin Subsystem ◽  
High Fields ◽  
Very High ◽  
Canted Phase

ABSTRACTThe magnetization of antiferromagnetic superconducting GdBa2Cu3O6+δ has been measured for ∼1.5 < T ≤4.2 K for magnetic fields up to ∼20 T. We found that all Gd3+ spins are nearly parallel at very high fields, and that this saturated spin subsystem coexists with superconductivity. Below the Neel temperature, 2.22 K, we observed the transition from the “canted” phase to the paramagnetic phase by the application of a high magnetic field. The temperature dependence of this phase transition is also reported.

MAGNETIC STUDIES OF SUPERCONDUCTING GdBa2Cu3O6+δ AT LOW TEMPERATURE AND HIGH FIELD

1987 ◽  
Vol 01 (05n06) ◽  
pp. 245-250 ◽  
Author(s):  
C.Y. HUANG ◽  
Y. SHAPIRA ◽  
P.H. HOR ◽  
R.L. MENG ◽  
C.W. CHU
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
High Magnetic Field ◽  
High Field ◽  
Paramagnetic Phase ◽  
Néel Temperature ◽  
Magnetic Studies ◽  
Spin Subsystem ◽  
Very High ◽  
Canted Phase

The magnetization of antiferromagnetic superconducting GdBa2Cu3O6+δ has been measured for ~1.5<T≤4.2 K for field up to ~20 T. We found that all Gd3+ spins are nearly parallel at very high field, and that this saturated spin subsystem coexists with superconductivity. Below the Néel temperature, 2.22 K, we observed the transition from the “canted” phase to the paramagnetic phase by the application of a high magnetic field.

MAGNETO-OPTICAL ROTATION IN VERY HIGH FIELDS

1960 ◽  
Vol 38 (7) ◽  
pp. 941-944 ◽  
Author(s):  
Richard Stevenson
Keyword(s):  
Magnetic Field ◽  
High Field ◽  
Optical Rotation ◽  
Field Limit ◽  
Electron Theory ◽  
Important Data ◽  
Kerr Rotation ◽  
High Fields ◽  
The Magnetic Field ◽  
Very High

Magneto-optical rotation by transmission through or reflection from solids is examined by the classical free electron theory, with the view of taking such a measurement using fields in the megagauss range. In general the rotation is a markedly non-linear function of the magnetic field, and in some cases can change in sign as the field increases. For very low fields the rotation varies directly with B, but in the high field limit the rotation varies inversely with the field. For substances in which the intercollision time of the electron is small, measurements of the Kerr rotation (i.e. by reflection) will give the electron mobility as a function of the magnetic field, and thus will give important data which can be used in conjunction with high field magnetoresistance experiments.

Application of the Landau-Luttinger Liquid Formulation to the Study of the Magnetic Properties of the 1-D Hubbard Model

1991 ◽  
Vol 05 (01n02) ◽  
pp. 3-30 ◽  
Author(s):  
J. Carmelo ◽  
P. Horsch ◽  
P.A. Bares ◽  
A.A. Ovchinnikov
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Low Temperature ◽  
Hubbard Model ◽  
Luttinger Liquid ◽  
Liquid Formulation ◽  
One Dimensional ◽  
Spin Excitations ◽  
Arbitrary Strength ◽  
The One

The Landau-Luttinger liquid formulation is used to investigate the physics of the one-dimensional Hubbard model in a magnetic field of arbitrary strength H. The low lying charge and spin excitations are studied. A novel branch of sound wave-like spin excitations arises for H>0. The low temperature thermodynamics is considered in some detail.

High-field liquid state NMR hyperpolarization: a combined DNP/NMRD approach

2014 ◽  
Vol 16 (35) ◽  
pp. 18781-18787 ◽  
Author(s):  
Petr Neugebauer ◽  
Jan G. Krummenacker ◽  
Vasyl P. Denysenkov ◽  
Christina Helmling ◽  
Claudio Luchinat ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Dynamic Nuclear Polarization ◽  
Liquid State ◽  
High Field ◽  
Nuclear Polarization ◽  
Nmr Relaxation ◽  
Relaxation Dispersion ◽  
Liquid Solutions ◽  
High Fields

Dynamic nuclear polarization and NMR relaxation dispersion measurements have been performed on liquid solutions of TEMPOL radicals in solvents with different viscosities at a high magnetic field of 9.2 T. The results indicate that fast dynamics significantly contribute to DNP enhancements at high fields.

STRUCTURAL, ELECTRONIC STRUCTURE, TRANSPORT AND MAGNETIC STUDIES OF NdFe1-xNixO3(x = 0.4, 0.5)

2011 ◽  
Vol 25 (32) ◽  
pp. 2439-2450 ◽  
Author(s):  
ABIDA BASHIR ◽  
MOHD IKRAM ◽  
RAVI KUMAR
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Magnetic Properties ◽  
Electronic Structure ◽  
Embedded System ◽  
Single Phase ◽  
Magnetic Studies ◽  
Paramagnetic Doublet ◽  
Chemical States ◽  
The Embedded System

The structural, transport, electronic structure and magnetic properties of NdFe 1-x Ni x O 3(x = 0.4, 0.5) samples are studied. Both the samples are in single phase with orthorhombic Pbnm structure. The transport properties show the semiconducting nature of the system and no transition is seen on the application of magnetic field. The electronic structure studies verify the chemical states of the ions in the embedded system and the symmetry of the interacting ions. The magnetic properties show the transition from ferromagnetic to paramagnetic phase and which is studied through the Mossbauer studies. The paramagnetic doublet in the x = 0.5 system clearly shows the phase transition from ferromagnetic to paramagnetic.

Effect of a magnetic field on the fluorescence produced in irradiated anthracene solutions

1977 ◽  
Vol 55 (11) ◽  
pp. 2093-2101 ◽  
Author(s):  
R. S. Dixon ◽  
F. P. Sargent ◽  
V. J. Lopata ◽  
E. M. Gardy ◽  
B. Brocklehurst
Keyword(s):  
Magnetic Field ◽  
Fluorescence Intensity ◽  
Applied Magnetic Field ◽  
High Field ◽  
Spin Correlation ◽  
Hydrocarbon Solvents ◽  
Theoretical Predictions ◽  
High Fields ◽  
Ion Recombination ◽  
Gamma Irradiated

The effect of an applied magnetic field on the fluorescence from radiolytic ion recombination has been studied for anthracene in some hydrocarbon solvents. In pulse-irradiated anthracene (10−2 mol dm−3) in squalane, the fluorescence intensity following the pulse increases as a function of applied magnetic field in the range studied, 0 to 0.3 T (0 to 3000 G). At a constant magnetic field strength, the field-induced enhancement of the fluorescence intensity varies with time after the pulse. At high field strengths (0.3 T) the enhancement reaches a maximum of ∼45% about 50 ns after the pulse. Similar effects are observed in cyclohexane but the enhancement is smaller than that in squalane. In benzene solutions the effect is extremely small. These findings are confirmed by observations in continuously gamma-irradiated solutions. In gamma-irradiated solutions of anthracene (10−2 mol dm−3) in squalane, the fluorescence intensity increases with increasing magnetic field and approaches ∼13% enhancement at high fields (>0.1 T). The enhancement is smaller (∼3%) in cyclohexane and very small (<1%) in benzene solutions. 9,10-Dimethylanthracene gives a larger enhancement and anthracene-d10 a smaller enhancement than the parent anthracene at high fields. The results are in general agreement with recent theoretical predictions based on the effect of a magnetic field on the loss of spin correlation of geminate ions pairs prior to recombination.

Magnetic Prehistory in the Heat Capacity of the Low-Temperature Superconductors

2015 ◽  
Vol 233-234 ◽  
pp. 741-744
Author(s):  
Sergey Mikhailovich Podgornykh
Keyword(s):  
Magnetic Field ◽  
Heat Capacity ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Temperature Dependence ◽  
Zero Magnetic Field ◽  
Zero Field ◽  
Ring Specimen ◽  
Trapped Flux ◽  
The Magnetic Field

Effect of the magnetic prehistory on the temperature dependence of the heat capacity of the superconducting Pb, La, Sn. has been studied. As soon as the external magnetic field riches the valueHext=HCthe superconductivity is completely destroyed. The trapped flux was produced in the ring specimen after the magnetic field was turned off atT<TC. We observed a difference of the value of the heat capacity between zero field cooled (ZFC) and field cooled (FC) states in zero magnetic field for the ring specimen. It is found that the FC heat capacity is smaller than the heat capacity both in the normal and in superconducting states.

High-Field Giant Magnetoresistance in Co-Cu Superlattices

1993 ◽  
Vol 313 ◽  
Author(s):  
Darryl Barlett ◽  
Frank Tsui ◽  
Lincoln Lauhon ◽  
Tushar Mandrekar ◽  
Ohrad Uher ◽  
...  
Keyword(s):  
High Field ◽  
Giant Magnetoresistance ◽  
Granular Systems ◽  
Switching Field ◽  
Present Evidence ◽  
Conduction Electrons ◽  
New Type ◽  
High Fields ◽  
Very High ◽  
Cobalt Copper

ABSTRACTWe present evidence for a new type of giant magnetoresistance in (111) cobalt-copper superlattices with atomically smooth interfaces. We propose that the lowered dimensionality of the structure leads to an enhancement of the scattering of conduction electrons from paramagnetic interfaces obeying a Langevin-like saturation at very high fields, well beyond the switching field of the Co layers. The findings help to explain similarities in magnetotransport behavior with recently reported granular systems as well as differences with antiferromagnetically coupled Multilayers.

HIGH MAGNETIC FIELD DEPENDENT DIAMAGNETIC SHIFTS IN AlxGa1-xAs SEMICONDUCTOR ALLOYS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 2960-2963 ◽  
Author(s):  
E. D. JONES ◽  
J. L. RENO ◽  
S. CROOKER ◽  
K. K. BAJAJ ◽  
G. COLI
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
High Magnetic Field ◽  
Photoluminescence Spectroscopy ◽  
Direct Measure ◽  
Semiconductor Alloys ◽  
Diamagnetic Shift ◽  
Two Samples ◽  
Field Dependent ◽  
High Fields

Low temperature diamagnetic shifts and FWHM linewidths of excitonic transitions in Al x Ga 1-x As alloys are reported as a function of magnetic field (50T maximum) at 4K using photoluminescence spectroscopy. Two samples with aluminum compositions of 5 and 20%, are discussed. The slope of the diamagnetic shift at high fields allows a direct measure of the excitonic reduced mass μ.

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