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Characteristics and Properties

Mechanical properties, elastic constants, lattice vibrations of Gallium Indium Arsenide Antimonide (GaInAsSb)

Mechanical properties, elastic constants, lattice vibrations

Basic Parameter
Elastic constants
Micro Hardness
Acoustic Wave Speeds
Phonon frequencies

Basic Parameter

		Remarks	Referens
Bulk modulus	5.7·1011 dyn cm-2	300 K; compositions lattice-matched to GaSb	Mikhailova M.P. (1999)
	5.8·1011 dyn cm-2	300 K; compositions lattice-matched to InAs.
Debye temperature	~270 K	300 K; compositions lattice-matched to GaSb and InAs
Density	(5.69-0.08x) g cm-3 [5.32 (GaAs)÷5.77(InSb) g cm-3]	300 K; compositions lattice-matched to GaSb.
Melting point, Tm	~= 1100° C
Specific heat	~0.25 J g-1°C -1	300K
Hardness on the Mohs scale	between 3.8 and 5
Surface microhardness (using Knoop's pyramid test)	220(InAs) -- 750(GaAs) kg mm-2

Elastic constants at 300 K

for compositions lattice-matched to GaSb

C₁₁= (8.19 + 0.64x)·10¹¹ dyn cm^-2
C₁₂= (4.46 - 0.44x)·10¹¹ dyn cm^-2
C₄₄= (3.89 + 0.43x) ·10¹¹ dyn cm^-2


for compositions lattice-matched to GaSb

C₁₁= (8.34 + 0.73x)·10¹¹ dyn cm^-2
C₁₂= (4.54 - 0.42x)·10¹¹ dyn cm^-2
C₄₄= (3.95 + 0.50x) ·10¹¹ dyn cm^-2

For T=300 K

	For compositions lattice-matched to Gasb	For compositions lattice-matched to InAs
Bulk modulus (compressibility-1)	Bs= ~5.7·1011dyn cm-2	Bs= ~5.8·1011dyn cm-2
Shear modulus	C'= (1.86 + 0.54x)·1011dyn cm-2	C'= (1.9 + 0.57x)·1011dyn cm-2
[100] Young's modulus	Yo= (5.04 + 1.27x)·1011dyn cm-2	Yo= (5.14 + 1.35x)·1011dyn cm-2
[100] Poisson ratio	σo = 0.35 - 0.04x	σo = 0.35 - 0.04x

Micro Hardness

In1-xGaxAs0.9Sb0.1. Micro hardness (Hv) and energy gap values Eg vs composition of three alloy systems: (1, 2) - In1-xGaxAs ; (3, 4) - In1-xGaxAs0.9Sb0.1 (5, 6) - InAs1-x-0.1Sb0.1Py . Measured using (111) oriented epilayers at 50 g weight (stress) on Vikkers pyramid B.A.Matveev et al.   Izv.Akad.Nauk SSSR, Neorg.Mater, 26 (1990), 639 Contact authors: B.A.Matveev

 

Acoustic Wave Speeds

Wave propagation Direction	Wave character	Expression for wave speed	Wave speed (in units of 105 cm/s) for compositions lattice-matched to GaSb	Wave speed (in units of 105 cm/s) for compositions lattice-matched to InAs
[100]	VL	(C11/ρ )1/2	3.79 + 0.18x	3.83 + 0.2x
	VT	(C44/ρ)1/2	2.61 + 0.16x	2.64 + 0.17x
[110]	Vl	[(C11+Cl2+2C44)/2ρ]1/2	4.23 + 0.15x	4.28 + 0.17x
	Vt||	Vt||=VT=(C44/ρ)1/2	2.64 + 0.17x	2.61 + 0.16x
	Vt⊥	[(C11-C12)/2ρ]1/2	1.81 + 0.26x	1.83 + 0.27x
[111]	Vl'	[(C11+2C12+4C44)/3ρ]1/2	4.36 + 0.14x	4.41 + 0.16x
	Vt'	[(C11-C12+C44)/3ρ]1/2	2.11 + 0.22x	2.13 + 0.24x

Phonon frequencies

GaxIn1-xAsySb1-yAs. Frequencies of the LO and TO phonons vs. composition x for y=1-x. The solid curves represent the calculated results using the modifed REI model. (Jaw et al.[1989]).

GaxIn1-xAsySb1-yAs. Frequencies of the LO and TO phonons vs. x for y=1.48 -x. The solid curves represent the calculated results using the modifed REI model. (Jaw et al.[1989]).

 

Statistics