Elastic Properties of Double-Layered Manganite La_{1.2}Sr_{1.8-x}Ba_xMn_2O_7 (x=0.0-0.4)

• Authors: Y. Reddy , V. Prashanth Kumar , S. Ramesh , S. Venkanna , M. Ramana Reddy , P. Kistaiah , C. Vishnuvardhan Reddy
• Languages of publication: EN

Abstracts

EN

The elastic behavior of the sol-gel prepared double-layered manganite system La_{1.2}Sr_{1.8-x}Ba_xMn_2O_7 (x = 0.0-0.4) was investigated at 300 K, employing ultrasonic pulse transmission technique at 1 MHz. The values of elastic moduli and acoustic Debye temperature (θ_D) were computed from longitudinal and shear velocities. The measured values were corrected to zero porosity using Hasselman and Fulrath's formula. The elastic constants of the samples, estimated using Modi's heterogeneous metal-mixture rule, were also reported. The variation of elastic moduli with Ba concentration was interpreted in terms of strength of interatomic bonding.

Keywords

EN

75.47.Gk; 75.47.Lx

Discipline

• 75.47.Gk: Colossal magnetoresistance
• 75.47.Lx: Magnetic oxides

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 6
• Pages: 1687-1694

Dates

published

2008-06

received

2007-11-05

(unknown)

2007-12-19

Contributors

author

Y. Reddy

• Department of Physics, Osmania University, Hyderabad, 500 007, India
• Chitanya Bharathi Institute of Technology, Gandipet, Hyderabad, 500 075, India

author

V. Prashanth Kumar

• Department of Physics, Osmania University, Hyderabad, 500 007, India

author

S. Ramesh

• Department of Physics, Osmania University, Hyderabad, 500 007, India

author

S. Venkanna

• Department of Physics, Osmania University, Hyderabad, 500 007, India

author

M. Ramana Reddy

• Department of Physics, Osmania University, Hyderabad, 500 007, India

author

P. Kistaiah

• Department of Physics, Osmania University, Hyderabad, 500 007, India

author

C. Vishnuvardhan Reddy

• Department of Physics, Osmania University, Hyderabad, 500 007, India

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Identifiers

DOI

10.12693/APhysPolA.113.1687