Department of Physics

Indian Institute Of Technology Madras , Chennai
Dr. Ramachandra Rao, MS
MRC 103
DESIGNATION

Professor

Ph.D.

IIT Kharagpur

CURRENT RESEARCH INTEREST

Electronic and Magnetic Materials. Thin films and bulk Oxide electronics, Magnetotransport studies in manganites and SPINTRONICS

CONTACT

044 - 2257 4872

msrrao@iitm.ac.in

RESEARCH GROUPS

 Current Research :



 Recent Publications :

Senthil Kumar E, S. Venkatesh and M.S. Ramachandra Rao

Oxygen vacancy controlled tunable magnetic and electrical transport properties of (Li,Ni)-codped ZnO thin films

Applied Physics Letters 96, 232504 (2010).

Year: 2010

Magnetoimpedance and magnetodielectric properties of single phase 45PMN-20PFW-35PT ceramics

B. Ramachandran, N. Sudarshan, and M. S. Ramachandra Rao

Journal of Appl.Phys 107, 09C503 (2010).

Year: 2010

Synthesis and study of electrical and magnetic properties of vanadium oxide micro and nanosized rods grown using pulsed laser deposition technique

N. Rama and M.S. Ramachandra Rao

Solid State Communications 150, 1041 (2010).

Year: 2010

Charge transfer and electronic transitions in polycrystalline BiFeO3

Ramachandran, A Dixit, R. Naik, G. Lawes, and M .S. Ramachandra Rao B

Phys. Rev. B 82, 012102 (2010).

Year: 2010

Low temperature magnetocaloric effect in polycrystalline BiFeO3 ceramics

B. Ramachandran and M .S. Ramachandra Rao

Applied Physics Letters 95, 142505 (2009).

Year: 2009

Magnetic and optical properties of Mn-doped BaSnO3

K. Balamurugan, N. Harish Kumar, B. Ramachandran, M.S. Ramachandra Rao, J. Arout Chelvane,P.N. Santhosh

Solid State Communications 149, 884 (2009).

Year: 2009

Green light emitting oxygen deficient ZnO forks, brooms and spheres

Shubra Singh and M.S .Ramachandra Rao

Scripta Materialia 61, 169 (2009).

Year: 2009

, Microstructural Study of Assorted ZnO Nanostructures: Nanocombs, Nanocones and Microspheres

Shubra Singh, E. Senthil Kumar and M. S. Ramachandra Rao

. Journal of Nanoscience and Nanotechnology 9 (2009).

Year: 2009

, Optical and electrical resistivity studies of isovalent and aliovalent 3d transition metal ion doped ZnO

Shubra singh and M.S.Ramachandra Rao

. Phys. Rev. B 80, 045210 (2009).

Year: 2009

Epitaxial ZnxFe3−xO4 thin films: A spintronic material with tunable electrical and magnetic properties

Deepak Venkateshvarn, Matthias Althammer, Andrea Nielsen, Stephan Geprags,M.S. Ramachandra Rao, Sebastian T.B. Goennenwein, Matthias Opel, and Rudolf Gross,

. Phys. Rev. B 79, 134405 (2009).

Year: 2009

, Structural, magnetic, and electrical studies on polycrystalline transition-metal-doped BiFeO3 thin films

P Kharel, S Talebi , B Ramachandran , A Dixi, V M Naik, M B Sahana, C Sudakar, R Naik, M.S. Ramachandra Rao, and G Lawes

. J. Phys.: Condens. Matter 21, 036001(2009).

Year: 2009

,A new red colour emitting phosphor – ZnS : Mn co-doped with Ba for electroluminescent (EL) displays

Panchatcharam Thiyagarajan, M. Kottaisamy, K. Sethupathi and and M.S. Ramachandra Raob

.Displays, 30, 202 (2009).

Year: 2009

UV excitable Y2-x-yGdySiO5:Cex phosphors for cool white light emission

P. Thiyagarajan, Brajesh Tiwari, M. Kottaisamy, N. Rama and M. S. Ramachandra Rao

Appl. Phys. A Material Science and Processing 94 607 (2009).

Year: 2009

, Synthesis of novel ZnO hexagonal nanocones by direct thermal evaporation method.

E. Senthil Kumar, Reddy S.R, M.S. Ramachandra Rao

J. Nanosci. Nanotechnol. 9, (2009).

Year: 2009

Anomalous Hall effect in magnetite: Universal scaling relation between Hall and longitudinal conductivity in low-conductivity ferromagnets.

Deepak Venkateshvaran, Wolfgang Kaiser, Andrea Boger, Matthias Althammer, M .S. Ramachandra Rao, Sebastian T.B. Goennenwein, Matthias Opel, and Rudolf Gross,

Phys. Rev. B 78, 092405(2008).

Year: 2008

Tuning the magnetization dynamics of silica-coated Fe3O4 core-shell nanoparticles by shell thickness control.

K. Mohan Kant, K. Sethupathi and M.S. Ramachandra Rao

J. Appl.Phys 103, 07D501 (2008).

Year: 2008

Correlation between electrical transport, optical, and magnetic properties of transition metal ion doped ZnO

Shubra Singh, N. Rama, K. Sethupathi and M.S. Ramachandra Rao

J. Appl. Phys.103, 07D108 (2008).

Year: 2008

Microstructural opticaland electrical properties of Cr doped ZnO

Shubra singh, E. Senthil Kumar and M.S. Ramachandra Rao

Scripta Materialia 58, 866 (2008).

Year: 2008

Formation of ZnO Nano Brushes in direct atmosphere using carbon catalyst and Zn metal source

Shubra Singh, Bhaskar Reddy, S.Kottaisamy and M.S. Ramachandra Rao

Nano, 3, (2008).

Year: 2008

Role of oxide barrier in integranular tunnel junctions: An enhanced magnetoresistnace in SiO2and ZnO-coated Fe3O4 nanopartilces compacts

K .Moahan kant, K.Sethupathi and M.S. Ramachandra Rao

J. Appl. Phys 103,07F318 (2008).

Year: 2008

Tuning the magentization dyanmics of silica-coated Fe3O4 core-shell nanoparticles by shell thickness control

K .Moahankant, K. Sethupathi and M.S. Ramachandra Rao

J.Appl. Phy. 103, 07D5012828574 (2008).

Year: 2008

Correlation between elctrical transport .optical and magnetic properties of transition metal ion doped ZnO

Shubra Singh, N .Rama, K.Sethupathi and M.S. Ramachandra Rao

J .Appl. Phys 103, 07D108 (2008).

Year: 2008

Electrical resistivity,thermoelectric power and electron spin resonance on Pr1xSrxMnO3 (x=0.2,0.26 and 0.3 )

N. Rama ,V .Sankaranarayanan and M.S. Ramachandra Rao

J.Alloys and Compounds 466, 12 (2008).

Year: 2008

Structural and physical properties of undoped and vanadium doped ZnO films deposited by pulsed laser deposition

Shubra Singh and M.S.Ramachandra Rao

J. Nanoscience and Nanotchnology 8 (2008).

Year: 2008

White light emitting diode synthesis using near Ultraviolet excitation on ZnO- SiO2 nanocomposite.

P. Thiyagarajan, M. Kottaisamy, N. Rama and M. S. Ramachandra Rao

Scripta Materialia 59 722 (2008).

Year: 2008

Topical Review ,Structural and physical properties of ZnO based materials in various forms: Bulk ,thin film and nano.

Shubra Singh P. Thiyagarajan, K. Mohan Kant ,Tirupathiah, B. Tiwari, N. Rama, M.M.K. Samy and M .S .Ramachandra Rao

J.Phys.D:Applied Physics 40,6312 (2007).

Year: 2007

PLD Growth of CNTs using a Nanostructured Ni Buffer Layer : Dependence of H2 partial Pressure

Maneesh Chandran , K. Mohan Kant, N.Rama and M.S.Ramachandra Rao

MRS, 0951-E06-15 (2007).

Year: 2007

Pulsed laser deposited oxide green emitting thin film phosphors:optimization of growth conditions

P.Thiyagarajan , M.K. Kottaisamy and M .S. Ramachandra Rao

Mater.Res.Soc.Symp.Proc 0988-QQ06-12 (2007).

Year: 2007

Effects of substrate on the electrical transport property of Ba2 FeNbO6 double perovskite thin films

N.Rama , J.B .Philipp , M. Opel , V. Sankaranarayanan , R. Gross and M . S .Ramachandra Rao

J.Phy. D: Appl.Phys. 40, 1430 (2007).

Year: 2007

Nanocrystalline barium zinconate titanate synthesized at low temperature by an aques co-precipitation technique

S .Bahskar Reddy, K. Prasad Rao and M.S. Ramachandra Rao

Scripta Materialia 57, 591 (2007).

Year: 2007

SPM Characterization of pulsed Laser Deposited Nanocrystalline CrN Hard Coatings

G .Mangamma, K. Mohan Kant, M.S. Ramachandra Rao, S. Kalavathy, M. Kamruddin, S. Dash and A.K. Tyagi

J .Nanosci. Nanotechnology 7, 2176 (2007).

Year: 2007

Obesrvation of high permittivity in Ho substituted BaZr0.1Ti0.9O3 ceramics

S.Bhaskar Reddy, M.S. Ramachandra Rao and K Prasad Rao

Appl.Phy.Lett. 91, 022917 (2007).

Year: 2007

Structural and dielectric characterization of Sr substituted Ba (Zr,Ti)) 3 based functional materials

S .Bhaskar Reddy, M.S. Ramachandra Rao and K Prasad Rao

Applied Physics A: Materials Science & Processing, A89, 1011 (2007).

Year: 2007

Influnece of disorder on the low and high temperature magnetization and magnetoresistance in Pr0.6R0.1Sr0.3MnO3 (R =Tb,Y,Ho and Er ) manganite

N. Rama , V .Sankaranarayanan , M.Opel, R.Gross and M. S . Ramachandra Rao,

Journal of Alloys and Compounds 443 , 7 (2007).

Year: 2007

Structural and luminescence properties of pulsed laser deposited green emitting Zn2SiO4:Mn phosphor thin films

P.Thiyagarajan, M .Kottaisamy and M.S. Ramachandra Rao

Scripta Materials 57(5), 433 (2007)

Year: 2007

Improved luminescent properties of Zn2SiO4:Mn green phosophor prepared from a gel combustion synthesized ZnO:Mn-SiO2

P. Thiyagarajan , M. Koattaisamy and M. S. Ramachandra Rao

J . Electrochem. Soc. 154 (4), H297-H303 (2007).

Year: 2007

Luminescent properties of near UV excitable Ba2ZnS3:Mn red emitting phosphor blend for white LED and display applications

P.Thiyagarajan, M.Kottaisamy and M. S. Ramachandra Rao

Journal of Physics D: Applied Physics 39, 2701 (2006)

Year: 2006

Influence of sulphur and charge compenstor on tth luminescent properties of SrS:Ce prepared from SrSO4:Ce(SO4)2

P Thiyagarajan ,M .Kottaisamy and M .S.Ramachandra Rao

Master .Res. Bull 42(4), 753-761 (2006).

Year: 2006

Influence of d-d transition bands on electrical resistivity in Ni-doped polycrystalline ZnO

Shubra Singh, N. Rama and M.S. Ramachandra Rao

Applied Physics Letters 88, 222111 (2006).

Year: 2006

Role of double exchange interaction on the magnetic and electrical properties of Pr0.8Sr0.2MnO3 ferromagnetic insulating manganite

N. Rama, V. Sankaranarayanan and M.S. Ramachandra Rao

J.Appl.Phys 99, 08Q315 (2006).

Year: 2006

Effect of Ar annealing on the magnetic and transport properties of Pr0.7Sr0.3MnO3

N. Rama, K. Mohan Kant, V. Sankaranarayanan and M.S. Ramachandra Rao

J. Magn. Magn. Mater 302 e342-e346 (2006).

Year: 2006

Electrical transport and morphological study of PLD-grown nanostructured amorphous carbon thin films

K. Mohan Kant, N. Mahipal Reddy, N. Rama, K. Sethupathi and M.S. Ramachandra Rao

IOP science, Nanotechnology 17, 5244 (2006).

Year: 2006

Ferroelectric and magnetic property study of Ho2CuTiO6 double perovskite

S. Bhaskar Reddy, K. Mohan Kant, M. Opel, K. Prasad Rao, R. Gross and M.S.Ramachandra Rao

J. Magn. Magn. Mater303(2), e332 (2006).

Year: 2006

Search for ferromagnetism in undoped and cobalt-doped HfO2-

M. S. Ramachandra Rao, Darshan C. Kundaliya, S. J. Welz, S. B. Ogale, Abhijit S. Ogale, L. Fu, V. Zaitsev, B. Varughese, C. A. Cardoso, A. Curtin, S. Dhar, S. R.Shinde, S. E. Lofland, Steven Schwarz, N. D. Browning, and T. Venkatesan

Applied Physics Letters 88, 142505 (2006).

Year: 2006