<abstract xmlns="http://www.w3.org/1999/xhtml">Dynamical mechanical analysis yields information about the mechanical properties of a material as a function of deforming factors, such as temperature, oscillating stress and strain amplitudes. GaAs and Mn-doped GaAs at varied levels, used in making electronic devices, suffer from damage due to changes in environmental temperatures. This is a defective factor experienced during winter and summer seasons. Hence, there was a need to establish the best amount of manganese to be doped in GaAs so as to obtain a mechanically stable spin injector material to make electronic devices. Mechanical properties of Ga1-xMnxAs spin injector were studied in relation to temperatures above room temperature (25 °C). Here, creep compliance, Young’s moduli and creep recovery for all studied samples with different manganese doping levels (MDLs) were determined using DMA 2980 Instrument from TA instruments Inc. The study was conducted using displace-recover programme on DMA creep mode with a single cantilever clamp. The samples were prepared using RF sputtering techniques. From the creep compliance study it was found that MDL of 10 % was appropriate at 30 °C and 40 °C. The data obtained can be useful to the spintronic and electronic device engineers in designing the appropriate devices to use at 30 °C and above or equal to 40 °C. </abstract>

Dynamical mechanical analysis yields information about the mechanical properties of a material as a function of deforming factors, such as temperature, oscillating stress and strain amplitudes. GaAs and Mn-doped GaAs at varied levels, used in making electronic devices, suffer from damage due to changes in environmental temperatures. This is a defective factor experienced during winter and summer seasons. Hence, there was a need to establish the best amount of manganese to be doped in GaAs so as to obtain a mechanically stable spin injector material to make electronic devices. Mechanical properties of Ga1-xMnxAs spin injector were studied in relation to temperatures above room temperature (25 °C). Here, creep compliance, Young’s moduli and creep recovery for all studied samples with different manganese doping levels (MDLs) were determined using DMA 2980 Instrument from TA instruments Inc. The study was conducted using displace-recover programme on DMA creep mode with a single cantilever clamp. The samples were prepared using RF sputtering techniques. From the creep compliance study it was found that MDL of 10 % was appropriate at 30 °C and 40 °C. The data obtained can be useful to the spintronic and electronic device engineers in designing the appropriate devices to use at 30 °C and above or equal to 40 °C.

Young’s modulus and creep compliance of GaAs and Ga1-xMnxAs ferromagnetic thin films under thermal stress at varied manganese doping levels

Egerton University, Department of Physics, P.O. Box 536-20115, Egerton, Kenya

Universidade Federal de Itajuba, Av. BPS, 1303, 37500-903 Itajuba, MG, Brazil

Universitat Politecnica de Valencia, 46022, Valencia, Spain

Sao Paulo State University, Advanced Materials Group, Bauru Campus, Av. Luiz Edmundo Carrijo Coube N°14-01, Vargem Limpa Bauru-SP CEP: 17033-360, Brazil

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Young’s modulus and creep compliance of GaAs and GaMnAs ferromagnetic thin films under thermal stress at varied manganese doping levels

Dynamical mechanical analysis yields information about the mechanical properties of a material as a function of deforming factors, such as temperature,...

Young’s modulus and creep compliance of GaAs and Ga_1-xMn_xAs ferromagnetic thin films under thermal stress at varied manganese doping levels

Published Online: Jul 11, 2015

Page range: 340 - 347

Received: Mar 10, 2014

Accepted: Feb 28, 2015

DOI: https://doi.org/10.1515/msp-2015-0053

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.