scholarly journals Theoretical Analysis of Solute-Lattice Coupling Parameters in the Microscopic Elasticity Theory and Application to Elastic Energy in β-Brass

1994 ◽  
Vol 35 (5) ◽  
pp. 303-312 ◽  
Author(s):  
Hiroshi Kubo
Keyword(s):  
Theoretical Analysis ◽  
Elasticity Theory ◽  
Elastic Energy ◽  
Coupling Parameters ◽  
Lattice Coupling

Measurement of spin–phonon transition probabilities in ruby

1970 ◽  
Vol 48 (9) ◽  
pp. 1099-1103 ◽  
Author(s):  
M. El-Azab ◽  
C. F. Weissfloch
Keyword(s):  
Transition Probabilities ◽  
Relaxation Times ◽  
Phase Method ◽  
Relaxation Processes ◽  
Spin Lattice ◽  
X Band ◽  
Coupling Parameters ◽  
Lattice Coupling ◽  
Phonon Transition ◽  
Spin Phonon Transition

Measurements at X-band frequencies of relaxation times and spin–phonon transition probabilities in ruby grown by the "vapor phase" method were carried out. They demonstrate the existence of relaxation processes which cannot be related to the spin–lattice coupling parameters obtained from ultrasonic and static stress experiments.

EFFECTS OF IN-PLANE STRAIN ON MAGNETISM IN LaMnO3 THIN FILMS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3281-3284 ◽  
Author(s):  
K. H. AHN ◽  
A. J. MILLIS
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Plane Strain ◽  
Elastic Energy ◽  
Ground State ◽  
Lattice Mismatch ◽  
Tight Binding ◽  
Antiferromagnetic State ◽  
Magnetic Ground State ◽  
Lattice Coupling

The effects of the in-plane strain on the magnetic properties of LaMnO3 thin films are calculated using an elastic energy expression and a tight binding Hamiltonian with electron-lattice coupling. Tensile uniaxial strain of the order of 2%, which is the order of the magnitude of those induced in thin films by lattice mismatch with substrates, is found to change the magnetic ground state from A-type antiferromagnetic state to purely antiferromagnetic state.

General Elasticity Theory for Graphene Membranes Based on Molecular Dynamics

2007 ◽  
Vol 1057 ◽  
Author(s):  
Kaveh Samadikhah ◽  
Juan Atalaya ◽  
Caroline Huldt ◽  
Andreas Isacsson ◽  
Jari Kinaret
Keyword(s):  
Molecular Dynamics ◽  
Elasticity Theory ◽  
Elastic Energy ◽  
Poisson Ratio ◽  
Md Simulations ◽  
Energy Functional ◽  
Linear Description ◽  
Continuum Description ◽  
External Forces ◽  
Graphene Membranes

ABSTRACTWe have studied the mechanical properties of suspended graphene membranes using molecular dynamics (MD) and generalized continuum elasticity theory (GE) in order to develop and assess a continuum description for graphene. The MD simulations are based on a valence force field model which is used to determine the deformation and the elastic energy of the membrane (EMD) as a function of external forces. For the continuum description, we use the expression Econt = Estretching + Ebending for the elastic energy functional. The elastic parameters (tensile rigidity and Poisson ratio) entering Econt are determined by requiring that Econt = EMD for a set of deformations.Comparisons with the MD results show excellent agreement. We find that the elastic energy of a supported graphene sheets is typically dominated by the nonlinear stretching terms whereas a linear description is valid only for very small deflections. This implies that in some applications, i.e. NEMS, a linear description is of limited applicability.

Orbit-lattice coupling parameters for lanthanides in CaF2

1984 ◽  
Vol 102 (5-6) ◽  
pp. 251-252 ◽  
Author(s):  
S.C. Chen ◽  
D.J. Newman
Keyword(s):  
Coupling Parameters ◽  
Lattice Coupling

scholarly journals Linewidth Narrowing of Mutually Injection Locked Semiconductor Lasers with Short and Long Delay

2019 ◽  
Vol 9 (7) ◽  
pp. 1436 ◽  
Author(s):  
Weichao Ma ◽  
Bing Xiong ◽  
Changzheng Sun ◽  
Xu Ke ◽  
Jian Wang ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Semiconductor Laser ◽  
Semiconductor Lasers ◽  
Practical Method ◽  
Injection Locking ◽  
Laser Linewidth ◽  
Integrated Devices ◽  
Coupling Parameters ◽  
Fiber Link ◽  
Mutual Injection Locking

A simple and effective approach to semiconductor laser linewidth narrowing via mutual injection locking is proposed and demonstrated in both short and long delay regimes. A theoretical analysis is presented to investigate the linewidth behavior of semiconductor lasers under mutual injection locking. Experimental demonstrations in short and long delay regimes are implemented by integrated devices and a fiber link system, respectively. Locking condition and dependence of laser linewidth on coupling parameters in both regimes are studied, confirming mutual injection locking as a practical method for linewidth narrowing. For the short-delayed integrated lasers, a linewidth narrowing factor of 13 is demonstrated and sub-MHz linewidth is achieved, while for the long-delayed lasers coupled by fiber link, the intrinsic linewidth is reduced to sub-100 Hz.

scholarly journals Intrinsic trapping sites and ion-lattice coupling parameters of cerium-doped lutetium oxyorthosilicate

2000 ◽  
Author(s):  
D. Wayne Cooke ◽  
Ross E. Muenchausen ◽  
Bryan L. Bennett ◽  
Kenneth J. McClellan ◽  
Jennifer M. Roper ◽  
...  
Keyword(s):  
Lutetium Oxyorthosilicate ◽  
Coupling Parameters ◽  
Lattice Coupling ◽  
Trapping Sites

Electron-lattice coupling parameters and oscillator strengths of cerium-doped lutetium oxyorthosilicate

2000 ◽  
Vol 61 (18) ◽  
pp. 11973-11978 ◽  
Author(s):  
D. W. Cooke ◽  
B. L. Bennett ◽  
K. J. McClellan ◽  
J. M. Roper ◽  
M. T. Whittaker ◽  
...  
Keyword(s):  
Oscillator Strengths ◽  
Lutetium Oxyorthosilicate ◽  
Coupling Parameters ◽  
Lattice Coupling

On the Puncture Mechanics of Rubber

1994 ◽  
Vol 67 (5) ◽  
pp. 743-760 ◽  
Author(s):  
A. Stevenson ◽  
Kamarudin Ab Malek
Keyword(s):  
Fracture Mechanics ◽  
Elasticity Theory ◽  
Theoretical Approach ◽  
Elastic Energy ◽  
Model Experiment ◽  
Crack Formation ◽  
Biaxial Stretching ◽  
Rubber Surface ◽  
Tearing Energy ◽  
Ring Crack

Abstract The mechanics of puncture have been studied experimentally and theoretically, by means of fracture mechanics. When a sharp cylindrical indentor penetrates rubber, a starter crack initiates as a ring on the rubber surface before puncture occurs. By treating this as militating puncture, an equation has been derived for the energy of puncture. The elastic energy stored in the rubber is considered in terms of the energy beneath and surrounding the indentor. An equation for the energy beneath the indentor is determined with the aid of a model experiment based on the biaxial stretching of rubber by inflation. The energy stored in the rubber surrounding the indentor is calculated using elasticity theory. The magnitude of these contributions is assessed for different indentor sizes and different rubber vulcanizates, The theoretical approach is shown to be verified by a series of experiment for sharp indentors. The values of puncture energy so obtained were found to agree well with the catastrophic tearing energy obtained from trouser tear tests. For blunt indentors which do not cause ring crack formation, other considerations are needed. These are discussed together with experimental results for hemispherical indentors.

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