Anomalous behavior of Transiting Exoplanet Survey Satellite (TESS) optical assembly: root cause investigation reveals crystallization of RTV 566 at low temperatures

2019 ◽  
Author(s):  
John A. Wellman ◽  
Todd M. Mower ◽  
Keith B. Doyle
Keyword(s):  
Low Temperatures ◽  
Anomalous Behavior ◽  
Root Cause

scholarly journals Electron liquid state in the symmetric Anderson lattice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Igor N. Karnaukhov
Keyword(s):  
Low Temperatures ◽  
Arbitrary Dimension ◽  
Mean Field ◽  
Coulomb Repulsion ◽  
Anomalous Behavior ◽  
Effective Field ◽  
Kondo Lattice ◽  
Field Approach ◽  
Cubic Lattices ◽  
Half Filling

AbstractUsing mean field approach, we provide analytical and numerical solution of the symmetric Anderson lattice for arbitrary dimension at half filling. The symmetric Anderson lattice is equivalent to the Kondo lattice, which makes it possible to study the behavior of an electron liquid in the Kondo lattice. We have shown that, due to hybridization (through an effective field due to localized electrons) of electrons with different spins and momenta $$\mathbf{k} $$ k and $$\mathbf{k} +\overrightarrow{\pi }$$ k + π → , the gap in the electron spectrum opens at half filling. Such hybridization breaks the conservation of the total magnetic momentum of electrons, the spontaneous symmetry is broken. The state of electron liquid is characterized by a large Fermi surface. A gap in the spectrum is calculated depending on the magnitude of the on-site Coulomb repulsion and value of s–d hybridization for the chain, as well as for square and cubic lattices. Anomalous behavior of the heat capacity at low temperatures in the gapped state, which is realized in the symmetric Anderson lattice, was also found.

Heat capacities of O2, N2, CO, and NO at low temperatures

1969 ◽  
Vol 47 (1) ◽  
pp. 23-29 ◽  
Author(s):  
J. C. Burford ◽  
G. M. Graham
Keyword(s):  
Low Temperatures ◽  
Degrees Of Freedom ◽  
Anomalous Behavior ◽  
Heat Capacities ◽  
Temperature Range

The heat capacities of O2, N2, CO, and NO have been measured in the temperature range from 4.2 °K to about 0.8 °K. No anomalous behavior was found. The results were fitted to the Debye expression (assuming 3 degrees of freedom per molecule) to yield the following values for Θ0: O2, 104.5 ± 1.0 °K; N2, 83.5 ± 1.0 °K; CO, 103.0 ± 1.0 °K; NO, 122 ± 2 °K. The results are discussed in terms of the residual entropies of CO and NO.

Concerning the problem of anomalous behavior of hydrogen in steel at low temperatures

1977 ◽  
Vol 12 (5) ◽  
pp. 469-471
Author(s):  
N. S. Borisova ◽  
L. M. Ammosova
Keyword(s):  
Low Temperatures ◽  
Anomalous Behavior

Anomalous behavior of the phonon spectrum of the relaxor ferroelectric PMN at low temperatures

1999 ◽  
Vol 226 (1) ◽  
pp. 147-157 ◽  
Author(s):  
S. G. Lushnikov ◽  
S. N. Gvasaliya ◽  
I. G. Siny ◽  
E. A. Goremychkin ◽  
I. L. Sashin
Keyword(s):  
Phonon Spectrum ◽  
Low Temperatures ◽  
Anomalous Behavior ◽  
Relaxor Ferroelectric

REMARKS ON THE ANOMALOUS BEHAVIOR OF ALLOYS CONTAINING TRACES OF MANGANESE OR SIMILAR ELEMENTS

1956 ◽  
Vol 34 (12A) ◽  
pp. 1281-1284 ◽  
Author(s):  
C. J. Gorter ◽  
G. J. van den Berg ◽  
J. de Nobel
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Special Reference ◽  
Hall Effect ◽  
Low Temperatures ◽  
Anomalous Behavior ◽  
Rapid Decrease ◽  
Magnetic Resonances ◽  
Resistance Minimum ◽  
Similar Elements

The anomalous behavior of alloys containing traces of manganese and similar elements is rapidly reviewed as to electrical conductivity, magnetoresistance, susceptibility, magnetic resonances, thermoelectricity, specific heat, thermal conductivity, and Hall effect. Special reference is given to recent data obtained in Leyden. It is argued that, while the rapid decrease of the resistance sometimes occurring at very low temperatures apparently must be attributed to some kind of antiferromagnetic alignment, the resistance minimum, as well as the anomalies in thermoelectricity and the Hall effect, might be due to gaps at the crystalline boundaries.

Anomalous Behavior in Spin Dependent Tunnel Junctions

1997 ◽  
Vol 475 ◽  
Author(s):  
C. L. Platt ◽  
B. Dieny ◽  
A.E. Berkowitz
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
Barrier Layer ◽  
Tunnel Junction ◽  
Applied Magnetic Field ◽  
Low Temperatures ◽  
Tunnel Junctions ◽  
Anomalous Behavior ◽  
Field Transition

ABSTRACTSpin dependent tunneling has been investigated in tunnel junctions composed of a variety of materials. The best results thus far have been with either HfO2 or MgO as the barrier layer using CoFe, Fe, or Co as the magnetic electrodes. The maximum magnetoresistive (MR) response of these junctions has been at low temperatures on the order of 30% in HfO2 and 20% in MgO. We have also observed a variety of anomalous behavior in some of our tunnel junctions at low temperature. These include MR effects dependent on the angle of orientation of the tunnel junction in the applied magnetic field, transition fields greater than lOkOe, and negative MR effects on the order of 2%.

Are Gel-Derived Glasses Different from Ordinary Glasses?

1986 ◽  
Vol 73 ◽  
Author(s):  
M. C. Weinberg
Keyword(s):  
Phase Transformation ◽  
Thermal Properties ◽  
High Temperature ◽  
Experimental Evidence ◽  
High Temperatures ◽  
Low Temperatures ◽  
Anomalous Behavior ◽  
Transformation Behavior ◽  
Gel Glasses ◽  
Very High

ABSTRACTA review is presented of some of the previously reported differences and similarities between comparable gel glasses (and gels) and ordinary glasses. In this regard, considerations are made with respect to such factors as structure, physical and thermal properties, and phase transformation behavior. A variety of silicate lass compositions are used for illustrative purposes. The discussion is roughly ivided into two sections; low and high temperature behavior. At low temperatures one anticipates that differences between gel and conventional glasses will exist, but such dissimilarities are not expected to persist to high temperatures. However, experimental evidence is presented which indicates the perpetuation of such differences to very high temperatures. A partial resolution for this anomalous behavior is offered.

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