Linear Response and Thermal Equilibrium Noise of Magnetic Materials at Low Temperature: Logarithmic Relaxation, 1/F Noise, Activation and Tunnelling

1995 ◽  
pp. 157-169 ◽  
Author(s):  
S. Vitale ◽  
M. Cerdonio ◽  
G. A. Prodi ◽  
A. Cavalleri ◽  
P. Falferi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetic Materials ◽  
Thermal Equilibrium ◽  
Linear Response

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

Structural Investigation of the Photoinduced Spin Transition in the [Fe(PM-BiA)2(NCS)2] Compound

2006 ◽  
Vol 112 ◽  
pp. 81-88 ◽  
Author(s):  
Kouhei Ichiyanagi ◽  
Johan Hebert ◽  
Loic Toupet ◽  
Hérve Cailleau ◽  
Eric Collet ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Low Temperature ◽  
High Spin ◽  
Thermal Equilibrium ◽  
Molecular Crystal ◽  
Structural Investigation ◽  
Spin Transition ◽  
X Ray Diffraction ◽  
Structural Reorganization ◽  
X Ray

We investigated the thermo- and photo-induced phase transitions between low spin (LS) and high spin (HS) states of the molecular crystal of [Fe(PM-BiA)2(NCS)2] in the orthorhombic form, by using X-ray diffraction. The structure of the photoinduced HS state, generated from the LS state at low temperature, is compared to the structures of the HS and LS phases at thermal equilibrium and to the thermally trapped HS state. The preliminary results presented here show that the structural reorganization is similar in the different HS states.

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.

scholarly journals Spin Noise Spectroscopy Beyond Thermal Equilibrium and Linear Response

2014 ◽  
Vol 113 (15) ◽  
Author(s):  
P. Glasenapp ◽  
N. A. Sinitsyn ◽  
Luyi Yang ◽  
D. G. Rickel ◽  
D. Roy ◽  
...  
Keyword(s):  
Thermal Equilibrium ◽  
Linear Response ◽  
Spin Noise ◽  
Noise Spectroscopy

The low-temperature rate of electron capture beta decay in magnetic materials

1996 ◽  
Vol 79 (8) ◽  
pp. 5716
Author(s):  
L. M. Folan ◽  
V. I. Tsifrinovich ◽  
V. A. Sheverev
Keyword(s):  
Low Temperature ◽  
Magnetic Materials ◽  
Electron Capture ◽  
Beta Decay ◽  
Temperature Rate

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.

Photochemical reactions of bacteriorhodopsin in Triton X-100 solution studied by low temperature spectrophotometry

1985 ◽  
Vol 63 (7) ◽  
pp. 1891-1898 ◽  
Author(s):  
Tatsuo Iwasa ◽  
Fumio Tokunaga ◽  
Tỏru Yoshizawa
Keyword(s):  
Low Temperature ◽  
Thermal Equilibrium ◽  
Photochemical Reaction ◽  
Membrane Structure ◽  
Purple Membrane ◽  
Photochemical Reactions ◽  
The Other ◽  
Other Hand ◽  
Triton X

The photochemical reaction of purple membrane solubilized with Triton X-100 (T-BR) was investigated by low temperature spectrophotometry. The batho- and meta-intermediates of T-BR were observed to resemble bacteriorhodopsin in native purple membrane. Two photoproducts characteristic of the T-BR system were found, which were named the "490-nm complex" and the "380-nm complex". The 490-nm complex was in thermal equilibrium with T-BR in the dark. Cooling T-BR to low temperature favoured the 490-nm complex, which was photoinsensitive. On the other hand, the 380-nm complex was produced by warming the batho-intermediate and reverted to the original T-BR. The meta-intermediate of T-BR may possibly be in thermal equilibrium with the 380-nm complex. On the basis of the above results, the possible role of the membrane structure was discussed

Low temperature sintering and magnetic properties of garnet microwave magnetic materials

2007 ◽  
Vol 105 (2-3) ◽  
pp. 408-413 ◽  
Author(s):  
Chien-Yie Tsay ◽  
Chung-Kwei Lin ◽  
Hua-Chi Cheng ◽  
Kuo-Shung Liu ◽  
I.-Nan Lin
Keyword(s):  
Magnetic Properties ◽  
Low Temperature ◽  
Magnetic Materials ◽  
Low Temperature Sintering
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