Magnetic aftereffect experiments at low temperature: Linear response and quantum noise

1995 ◽  
Vol 52 (5) ◽  
pp. 3466-3470 ◽  
Author(s):  
J-E. Wegrowe ◽  
R. Ballou ◽  
B. Barbara ◽  
A. Sulpice ◽  
V. S. Amaral ◽  
...  
Keyword(s):  
Low Temperature ◽  
Linear Response ◽  
Quantum Noise ◽  
Magnetic Aftereffect

scholarly journals DOMAIN WALL RESISTIVITY BASED ON A LINEAR RESPONSE THEORY

2001 ◽  
Vol 15 (04) ◽  
pp. 321-371 ◽  
Author(s):  
GEN TATARA
Keyword(s):  
Low Temperature ◽  
Domain Wall ◽  
Linear Response ◽  
Quantum Coherence ◽  
Weak Localization ◽  
Linear Response Theory ◽  
Thin Wall ◽  
Response Theory ◽  
Classical Domain ◽  
Wall Interaction

The resistivity due to a domain wall in a ferromagnetic metal is calculated based on a linear response theory. The scattering by impurities is taken into account. The electron-wall interaction is derived from the exchange interaction between the conduction electron and the magnetization by use of a local gauge transformation in the spin space. This interaction is treated perturbatively to the second order. The classical (Boltzmann) contribution from the wall scattering turns out to be negligiblly small if the wall is thick compared with the fermi wavelength. In small contacts a large classical domain wall resistance is expected due to a thin wall trapped in the constriction. In the dirty case, where quantum coherence among electrons becomes important at low temperature, spin flip scattering caused by the wall results in dephasing and hence suppresses weak localization. Thus the quantum correction due to the wall can lead to a decrease of resistivity. This effect grows rapidly at low temperature where the wall becomes the dominant source of dephasing. Conductance change in the quantum region caused by the motion of the wall is also calculated.

PROPERTIES OF LOW TEMPERATURE QUANTUM NOISE

1986 ◽  
pp. 277-279
Author(s):  
Roland JUNG ◽  
Gert-Ludwig INGOLD ◽  
Peter SCHRAMM ◽  
Hermann GRABERT
Keyword(s):  
Low Temperature ◽  
Quantum Noise

Quantum noise in various diodes at low temperature

Physica B+C ◽  
1980 ◽  
Vol 101 (1) ◽  
pp. 107-110
Author(s):  
A. van der Ziel
Keyword(s):  
Low Temperature ◽  
Quantum Noise

scholarly journals Monolithic Microwave-Microfluidic Sensors Made with Low Temperature Co-Fired Ceramic (LTCC) Technology

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 577 ◽  
Author(s):  
Karol Malecha ◽  
Laura Jasińska ◽  
Anna Grytsko ◽  
Kamila Drzozga ◽  
Piotr Słobodzian ◽  
...  
Keyword(s):  
Low Temperature ◽  
Linear Response ◽  
Test Sample ◽  
Resonance Phenomenon ◽  
Buffer Solution ◽  
Microwave Frequencies ◽  
Microfluidic Sensors ◽  
Sensor Properties ◽  
Microwave Signals ◽  
Monolithic Structures

This paper compares two types of microfluidic sensors that are designed for operation in ISM (Industrial, Scientific, Medical) bands at microwave frequencies of 2.45 GHz and 5.8 GHz. In the case of the first sensor, the principle of operation is based on the resonance phenomenon in a microwave circuit filled with a test sample. The second sensor is based on the interferometric principle and makes use of the superposition of two coherent microwave signals, where only one goes through a test sample. Both sensors are monolithic structures fabricated using low temperature co-fired ceramics (LTCCs). The LTCC-based microwave-microfluidic sensor properties are examined and compared by measuring their responses for various concentrations of two types of test fluids: one is a mixture of water/ethanol, and the other is dopamine dissolved in a buffer solution. The experiments show a linear response for the LTCC-based microwave-microfluidic sensors as a function of the concentration of the components in both test fluids.

scholarly journals ANALISIS RESISTANSI COIL KAWAT TEMBAGA TERHADAP PERUBAHAN SUHU SANGAT RENDAH SEBAGAI RANCANG DASAR PENGUKURAN SUHU RENDAH

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Riswanto Riswanto
Keyword(s):  
Low Temperature ◽  
Linear Response ◽  
Copper Wire ◽  
Temperature Changes ◽  
Effective Form ◽  
Wire Conductor ◽  
Value Determination ◽  
Index Value ◽  
Wire Resistance ◽  
Coil Shape

The resistance of a wire conductor depend of the wire material. Copper wire formed into a coil shape an effective form to produce a large resistance. Copper wire resistance influenced bytemperature about it. Coil of copper wire has a good response at low temperature changes produced by liquid nitrogen. This response is shown by the index value determination (R2 = 0.999) which is close to the value 1,that means changes in temperature approaching a linear response to changes in a voltage. The results can be used as a basis for the design of the low-temperature measurements cheaper

scholarly journals Monolithic Microwave-Microfluidic Sensors Made with Low Temperature Co-Fired Ceramics (LTCC) Technology

2019 ◽  
Author(s):  
Karol Malecha ◽  
Laura Jasińska ◽  
Anna Grytsko ◽  
Kamila Drzozga ◽  
Piotr Słobodzian ◽  
...  
Keyword(s):  
Low Temperature ◽  
Linear Response ◽  
Test Sample ◽  
Resonance Phenomenon ◽  
Buffer Solution ◽  
Microwave Frequencies ◽  
Microfluidic Sensors ◽  
Sensor Properties ◽  
Microwave Signals ◽  
Monolithic Structures

This paper compares two types of microfluidic sensors that are designed for operation in ISM bands at microwave frequencies of 2.45 GHz and 5.8 GHz. In the case of the first sensor, the principle of operation is based on the resonance phenomenon in a microwave circuit filled with a test sample. The second sensor is based on the interferometric principle and makes use of the superposition of two coherent microwave signals, where only one of them goes through a test sample. Both sensors are monolithic structures fabricated using low temperature co-fired ceramics (LTCC). The LTCC-based microwave-microfluidic sensor properties are examined and compared by measuring their responses for various concentrations of two types of test fluids: one is a mixture of water/ethanol, and the other is dopamine dissolved in a buffer solution. The experiments show a linear response for the LTCC-based microwave-microfluidic sensors as a function of the concentration of the components in both test fluids.

FINITE TEMPERATURE LINEAR RESPONSE THEORY OF ANYONIC SUPERCONDUCTIVITY

1991 ◽  
Vol 05 (03) ◽  
pp. 211-225 ◽  
Author(s):  
Y. GEORGELIN ◽  
M. KNECHT ◽  
Y. LEBLANC ◽  
J.C. WALLET
Keyword(s):  
Low Temperature ◽  
Temperature Regime ◽  
Finite Temperature ◽  
Linear Response ◽  
Acoustic Phonon ◽  
Linear Response Theory ◽  
Zero Temperature ◽  
London Penetration Depth ◽  
Response Theory ◽  
Phonon Velocity

We extend a zero temperature non-relativistic anyonic superconductivity model to the finite temperature case. Making use of the finite temperature linear response theory, we calculate temperature corrections to various parameters of zero temperature superconductivity such as the London penetration depth, the acoustic phonon velocity and the coherence length. These results are qualitatively compared to known experimental results. Our results are expected to be valid in the low temperature regime.

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