ANOMALOUS AMPLITUDE DEPENDENT DISLOCATION DAMPING ASSOCIATED WITH ANHARMONIC OSCILLATIONS OF A COULOMBIC KINK CHAIN IN THE NONLINEAR DISSIPATIVE ATMOSPHERE OF IMPURITY ATOMS

Date

1991-11-16

Author

OGURTANI, TO

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

216
views

0
downloads

The effects of the anharmonic interaction of the Coulombic kink chain on the strength and the position of the cold-work internal friction peaks associated with the nonlinearly power dissipating impurity atoms are investigated by a novel numerical simulation of the related discrete mathematical macro-model. The present macroscopic model of dislocation damping which relies heavily on the microscopic theory of kink-interstitial interactions shows very strong anomalous strain amplitude as well as the bias stress dependence of internal friction peaks in accord with the experimental observations. Also it is deduced that the strength of pinning of the kinks at the ends of the chain can have profound influence on the strength and the position of the dislocation damping peaks.

Subject Keywords

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/63682

Journal

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH

DOI

https://doi.org/10.1002/pssa.2211280108

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Phonon dispersions and elastic constants of disordered Pd-Ni alloys Kart, SO; Tomak, Mehmet; Cagin, T (Elsevier BV, 2005-01-31) Phonon frequencies of Pd-Ni alloys are calculated by molecular dynamics (MD) simulation. Lattice dynamical properties computed from Sutton-Chen (SC) and quantum Sutton-Chen (Q-SC) potentials as a function of temperature are compared with each other. We present all interatomic force constants up to the 8th nearest-neighbor shell obtained by using the calculated potential. Elastic constants evaluated by two methods are consistent with each other. The transferability of the potential is also tested. The result...
Nonlinear intersubband optical absorption of Si delta-doped GaAs under an electric field Yildirim, Hasan; Tomak, Mehmet (Wiley, 2006-10-01) We study the nonlinear intersubband optical absorption of a single Si delta-doped GaAs sheet placed in the middle of a GaAs quantum well and subjected to an electric field. The Schrodinger and Poisson equations are solved self-consistently for various electric field strengths. The self-consistent solutions provide us with the correct confining potential, the wave functions, the corresponding subband energies and the subband occupations. The nonlinear optical intersubband absorption spectra are discussed wit...
Molecular-dynamics simulations of surface and bulk properties of Zn, Cd, and ZnCd systems Amirouche, L; Erkoç, Şakir (Wiley, 2004-02-01) Surface and bulk properties of Zn, Cd, and ZnCd systems have been investigated by performing molecular-dynamics simulations using a recently developed empirical many-body potential energy function for these systems, which comprices two- and three-body atomic interactions. Surface reconstruction and multilayer relaxation on clean surfaces, adatom on surface, substitutional atom on surface and bulk materials, and vacancy on surface and bulk materials have been studied extensively. (C) 2004 WILEY-VCH Verlag Gm...
Critical behaviour of the polarization, tilt angle, electric susceptibility and the specific heat close to the SmA-ferroelectric SmC (SmC*) phase transitions Yurtseven, Hasan Hamit; Kilit, E. (Informa UK Limited, 2006-01-01) This study gives the temperature dependence of the two order parameters, namely, polarization P and the tilt angle theta, when there is a biquadratic coupling P-2 theta(2) in the expansion of the Landau free energy. This applies to the electric-field-induced SmA-Ferro-Electric SmC (SmC*) phase transition. From this expansion of the Landau free energy in terms of the polarization and the tilt angle, we obtain the temperature dependence of the electric susceptibility chi and the electric field dependence of t...
Optoelectronic and electrical properties of TlGaS2 single crystal Qasrawi, AF; Hasanlı, Nızamı (Wiley, 2005-10-01) The optoelectronic and electrical properties of TIGaS2 single crystals have been investigated by means of room temperature transmittance and reflectance spectral analysis, Hall coefficient, dark electrical resistivity and photocurrent measurements in the temperature range of 200-350 K. The optical data have revealed an indirect and direct allowed transition band gaps of 2.45 and 2.51 eV, an oscillator and dispersion energy of 5.04 and 26.45 eV, respectively, a static dielectric constant of 6.25 and static r...

Citation Formats

T. OGURTANI, “ANOMALOUS AMPLITUDE DEPENDENT DISLOCATION DAMPING ASSOCIATED WITH ANHARMONIC OSCILLATIONS OF A COULOMBIC KINK CHAIN IN THE NONLINEAR DISSIPATIVE ATMOSPHERE OF IMPURITY ATOMS,” PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, pp. 69–81, 1991, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63682.