scholarly journals Unified decoupling scheme for exchange and anisotropy contributions and temperature-dependent spectral properties of anisotropic spin systems

2012 ◽  
Vol 86 (9) ◽  
Author(s):  
R. Bastardis ◽  
U. Atxitia ◽  
O. Chubykalo-Fesenko ◽  
H. Kachkachi
Keyword(s):  
Spectral Properties ◽  
Spin Systems ◽  
Temperature Dependent

scholarly journals Implications of temperature-dependent near-IR spectral properties of common minerals and meteorites for remote sensing of asteroids

1999 ◽  
Vol 26 (12) ◽  
pp. 1661-1664 ◽  
Author(s):  
J. L. Hinrichs ◽  
P. G. Lucey ◽  
M. S. Robinson ◽  
A. Meibom ◽  
A. N. Krot
Keyword(s):  
Remote Sensing ◽  
Spectral Properties ◽  
Temperature Dependent ◽  
Near Ir

Temperature dependent spectral properties of type-I and quasi type-II CdSe/CdS dot-in-rod nanocrystals

2012 ◽  
Vol 14 (10) ◽  
pp. 3505 ◽  
Author(s):  
Xiaoming Wen ◽  
Amit Sitt ◽  
Pyng Yu ◽  
Yon-Rui Toh ◽  
Jau Tang
Keyword(s):  
Spectral Properties ◽  
Type I ◽  
Type Ii ◽  
Temperature Dependent

scholarly journals Supersymmetric spin–phonon coupling prevents odd integer spins from quantum tunneling

2021 ◽  
Vol 94 (3) ◽  
Author(s):  
Kilian Irländer ◽  
Heinz-Jürgen Schmidt ◽  
Jürgen Schnack
Keyword(s):  
Quantum Tunneling ◽  
Degrees Of Freedom ◽  
Spin Systems ◽  
Phonon Coupling ◽  
Temperature Dependent ◽  
Integer Spin ◽  
Quantum Numbers ◽  
Spin Quantum ◽  
Strong Spin

AbstractQuantum tunneling of the magnetization is a phenomenon that impedes the use of small anisotropic spin systems for storage purposes even at the lowest temperatures. Phonons, usually considered for temperature dependent relaxation of magnetization over the anisotropy barrier, also contribute to magnetization tunneling for integer spin quantum numbers. Here we demonstrate that certain spin–phonon Hamiltonians are unexpectedly robust against the opening of a tunneling gap, even for strong spin–phonon coupling. The key to understanding this phenomenon is provided by an underlying supersymmetry that involves both spin and phonon degrees of freedom.

(111) Monocrystalline Nickel Films

1972 ◽  
Vol 30 ◽  
pp. 512-513
Author(s):  
T.E. Pratt ◽  
R.W. Vook
Keyword(s):  
Film Thickness ◽  
Deposition Rate ◽  
Room Temperature ◽  
Narrow Range ◽  
High Vacuum ◽  
Residual Pressure ◽  
Temperature Dependent ◽  
Deposition Parameters ◽  
Transmission Electron ◽  
Substrate Temperatures

(111) oriented thin monocrystalline Ni films have been prepared by vacuum evaporation and examined by transmission electron microscopy and electron diffraction. In high vacuum, at room temperature, a layer of NaCl was first evaporated onto a freshly air-cleaved muscovite substrate clamped to a copper block with attached heater and thermocouple. Then, at various substrate temperatures, with other parameters held within a narrow range, Ni was evaporated from a tungsten filament. It had been shown previously that similar procedures would yield monocrystalline films of CU, Ag, and Au.For the films examined with respect to temperature dependent effects, typical deposition parameters were: Ni film thickness, 500-800 A; Ni deposition rate, 10 A/sec.; residual pressure, 10-6 torr; NaCl film thickness, 250 A; and NaCl deposition rate, 10 A/sec. Some additional evaporations involved higher deposition rates and lower film thicknesses.Monocrystalline films were obtained with substrate temperatures above 500° C. Below 450° C, the films were polycrystalline with a strong (111) preferred orientation.

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