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Featured researches published by R. Perumal.


SOLID STATE PHYSICS: Proceedings of the 58th DAE Solid State Physics Symposium 2013 | 2014

The effect of deuteration and doping on the phase transition temperature of grown glycine phosphite single crystals

R. Perumal; A. Lakshmi Chandru; S. Moorthy Babu

The Glycinium Phosphite (GPI) compound is a representative of hydrogen-bonded ferroelectric crystals. The ordering of protons could be expected below the room temperature (225 K). Crystals grown from the milipore water as well as deuterated solvents respectively. The corresponding hydrogen bond distance was stretched out due to the effect of isotopic substitution that increase the phase transition temperature. Further to improve the phase transition temperature, GPI crystal was doped with organic complexing agent and various metals and the obtained results are presented.


Journal of Crystal Growth | 2008

Growth and characterization of an organometallic tri-allylthiourea complex nonlinear optical crystals

R. Perumal; S. Moorthy Babu


Crystal Research and Technology | 2006

Habit modification and improvement in properties of potassium hydrogen phthalate (KAP) crystals doped with metal ions

S. K. Geetha; R. Perumal; S. Moorthy Babu; P. M. Anbarasan


Journal of Alloys and Compounds | 2010

Optical characterization of ferroelectric glycinium phosphite single crystals

R. Perumal; K. Senthil Kumar; S. Moorthy Babu; G. Bhagavannarayana


Current Applied Physics | 2010

Synthesis, growth and characterization of an organometallic complex tri-allylthiourea cadmium bromide single crystals

R. Perumal; S. Moorthy Babu


Materials Chemistry and Physics | 2008

Growth and characterization of an organometallic nonlinear optical material tri-allylthiourea cadmium chloride (ATCC)

R. Perumal; S. Moorthy Babu


Crystal Research and Technology | 2007

Effect of different metal ions on structural, thermal, spectroscopic and optical properties of ATCC and ATMC single crystals

R. Perumal; S. Moorthy Babu


Physica B-condensed Matter | 2010

Synthesis, crystal growth, structural, spectral and optical properties of tri-allylthiourea mercury bromide (ATMB) single crystals

R. Perumal; S. Moorthy Babu


Optics Communications | 2010

Synthesis, crystal growth and characterization of a metal-organic nonlinear optical tri-allylthiourea mercury chloride single crystals

R. Perumal; S. Moorthy Babu


Journal of Alloys and Compounds | 2010

Crystal growth, structural perfection, phase transition, optical, and etching studies of doped glycine phosphite ferroelectric single crystals

R. Perumal; S. Moorthy Babu; G. Bhagavannarayana

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G. Bhagavannarayana

National Physical Laboratory

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