Department of Physics

Indian Institute Of Technology Madras , Chennai
Dr. Sankaranarayanan, V
HSB 113
DESIGNATION

Professor

Ph.D.

IIT Madras

CURRENT RESEARCH INTEREST

Low Temperature Physics, Super Conductivity

CONTACT

044 - 2257 4873

vsn@iitm.ac.in

RESEARCH GROUPS

 Current Research :



 Recent Publications :

Effect of micro-defects and Pb-loss on electrical and optical properties of PLZT ceramic

Samanta S., Sankaranarayanan V., Sethupathi, K.

The Journal of Materials Science: Materials in Electronics

Volume: In Press DOI: https://doi.org/10.1007/s10854-018-8713-0

Year: 2018

Dielectric response of the magnetic perovskite oxide Eu2FeCoO6.

Haripriya G. R., Pradheesh R., Sethupathi K., Sankaranarayanan V.

AIP Conference Proceedings

Volume: 1942 Page: 130052 DOI: https://doi.org/10.1063/1.5029122

Year: 2018

The effect of A-site substitution on the structure and magnetism of Sr2-xPrxFeCoO6 (x = 0, 1, 2)

Haripriya G. R., Debamitra Chakraborty, Pradheesh R., V. Sankaranarayanan, K. Sethupathi.

AIP Conference Proceedings

Volume: 1953 Page: 120053 DOI: https://aip.scitation.org/doi/10.1063/1.5033118

Year: 2018

Hyperfine interaction and electronic spin fluctuation study on Sr2−xLaxFeCoO6 (x=0, 1, 2) by high-resolution backscattering neutron spectroscopy

T. Chatterji, B. Frick, M. Zamponi, M. Appel, H. S. Nair, R. Pradheesh, G. R. Haripriya, V. Sankaranarayanan, K. Sethupathi.

Physical Review B

Volume: Accepted for publication

Year: 2018

Magnetic glass state and magnetoresistance in SrLaFeCoO6 double perovskite.

Pradheesh R, Harikrishnan S Nair, Haripriya G. R., Anatoliy Senyshyn, Tapan Chatterji, Sankaranarayanan V, Sethupathi K.

J. Phys: Cond. Matter

Volume: 29 Page: 095801

Year: 2017

Temperature dependent structural studies on the spin correlated system A2FeCoO6 (A= Sm, Eu, Dy and Ho) using synchrotron radiation

Haripriya G R, Pradheesh R, Singh M N, Sinha A K, Sethupathi K., Sankaranarayanan V.

AIP Advances.

Volume: 7 Page: 055826

Year: 2017

Spin reorientation and disordered rare earth magnetism in Ho2FeCoO6

Haripriya G R, Nair H S, Pradheesh R, Rayaprol S, Siruguri V, Singh D, Venkatesh R, Ganesan V, Sethupathi K, Sankaranarayanan V.

J. Phys: Cond. Matter.

Volume: 29 Page: 475804 DOI: 10.1088/1361-648X/aa919e

Year: 2017

Band gap reduction and redshift of lattice vibrational spectra in Nb and Fe co-doped PLZT

Samanta S, Muralidhar M, Sankaranarayanan V, Sethupathi K, Ramachandra Rao M S, Murakami M

Journal of Material Science

Volume: 52 Page: 13012 DOI: https://doi.org/10.1007/s10853-017-1425-7

Year: 2017

The Effect of Particle Size on the Magnetic Properties of Y2FeCoO6.

Haripriya G R, Shashi Priya Balmuchu, Pradheesh R, Sethupathi, K, Sankaranarayanan V

Proc. of the Intl. Conf. on Nanotechnology for Better Living.

Volume: 3 Page: 173

Year: 2016

Memristor Modelling

Muthuswamy B, J. Jevtie, H.H.C. Iu,, C. K. Subramaniam, K. Ganesan, V. Sankaranarayanan, K. Sethupathi, H. Kim, M. Pd. Shah and L.O. Chua

Proceedings of IEEE Int. Symposium on Circuits and Systems

Page: 490 DOI: DOI:10.1109/ISCAS.2014.6865179

Year: 2014

Large magneto resistance and Jahn teller effect in Sr2FeCoO6

Pradeesh .R , Harikrishnan. S .Nair, Sankaranarayanan. V, Sethupathi. K.

Euro. J. Phys. B

Volume: 85 Page: 260

Year: 2012

Exchange bias and memory effects in Sr2FeCoO6

Pradeesh.R., Harikrishnan.S.Nair, Sankaranarayanan.V., Sethupathi.K.

Appl. Phys. Lett.

Volume: 101 Page: 142401

Year: 2012

Observation of spin glass state in weakly ferromagnetic Sr2FeCoO6 double perovskite

Pradheesh.R., Harikrishnan S. Nair, Kumar. C.M.N., Jagat Lamsal, Nirmala.R., Santhosh. P.N., Yelon. W.B., Malik.S.K, Sankaranarayanan. V, Sethupathi. K

J. Appl. Phys. 111, 053905

Year: 2012

Giant Magnetoresistance and table-like magnetocaloric effect in double perovskite oxide PrSrMnCoO6.

Rabindranath Mahato, K. Sethupathi, V. Sankaranarayanan, R. Nirmala, A.K. Nigam and S. K. Malik

J. Appl. Phys. 109, 073E319

Year: 2011

Influence of grain size on magnetocaloric effect in the nanocrystalline La0.8Te0.2MnO3.

Rabindranath Mahato, K. Sethupathi, V. Sankaranarayanan

Int. J. Nanoscience 10, 597

Year: 2011

Functionalized Graphene-PVDF Foam Composites for EMI Shielding.

Eswaraiah, V., Sankaranarayanan. V and Ramaprabhu, S.

Macromol. Mater. Eng. 296

Year: 2011

Graphene based Engine Oil Nanofluids for Tribological Applications

Eswaraiah, V., Sankaranarayanan. V and Ramaprabhu, S.

ACS Appl. Mater. Interfaces 3, 4221

Year: 2011

Inorganic nanotubes reinforced polyvinylidene fluoride composites as lowcost electromagnetic interference shielding materials.

Eswaraiah, V., Sankaranarayanan. V. and Ramaprabhu, S.

Nanoscale Research Letters 6, 137

Year: 2011

Magnetic and magnetocaloric properties of nanocrystalline perovskite oxides Pr1-xAxMn1-yCoyO3 (A = C, Sr; & x=0.3,and y=0.5.)

Rabindranath Mahato, K. Sethupathi, V. Sankaranarayanan, R. Nirmala and S. K. Malik

J. Nano Sci. and Tech., 10, 1

Year: 2010

Colossal magnetoresistance in double perovskite oxide La2CoMnO6.

Rabindranath Mahato, K. Sethupathi and V. Sankaranarayanan

J. Appl. Phys., 107, 09D714

Year: 2010

Coexistence of giant magnetoresistance and large magnetocaloric effect near room temperature in La0.7Te0.3MnO3.

Rabindranath Mahato, K. Sethupathi, V. Sankaranarayanan, and R. Nirmala

J. Magn. Mag. Mater., 322, 2537

Year: 2010

Electrical study and dielectric relaxation behavior in nano-crystalline Ce0.85Gd0.15O2- δ material at intermediate temperatures.

Ashok Kumar Baral and Sankaranarayanan,V.

Appl. Phys. A Mat. Sci. and Processing, 98, 367

Year: 2010

Ionic transport properties in nanostructured Ce0.8A0.2O2-δ, (A = Eu, Gd, Dy and Ho) materials

Ashok Kumar Baral and Sankaranarayanan,V.

Nanoscale Res. Lett., 5, 637

Year: 2010

Grain size effect on electrical and dielectric properties of nanostructured Dy doped ceria (Ce0.8Dy0.2O2-δ)

Ashok Kumar Baral and Sankaranarayanan,V.

J. Electrochem. Soc., 157 , 53-58

Year: 2010

Magnetic behaviour in Dy1−xMmxCo2 Compounds

Srinivas, G. Ellerby, M., Skipper, N.T., Ramaprabhu, S. and Sankaranarayanan, V.

J. Phys.: Cond. Matter 22, 436001

Year: 2010

Large magnetic entropy change in nanocrystalline Pr0.7Sr0.3MnO3.

Rabindranath Mahato, K. Sethupathi, V. Sankaranarayanan and R. Nirmala

J. Appl. Phys. 107, 09A943

Year: 2010

Magnetic and Transport Properties of Laves phase Dy1-xMmxCo2 (x = 0 – 0,5)

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

Alloys. Intermetallics, 17, 150-153

Year: 2009

Competing magnetic interactions in the intermetallic compound Ho2Mn3Si5.

R. Nirmala, A.V. Morozkin, Jagal Lamsal, Z. Chu, V. Sankaranarayanan, K. Sethupathi, Y. Yamamoto, H. Hori, W.B. Yelon and S. K. Malik

J. Appl. Phys. 105, 07A721

Year: 2009

Magnetic Transport and Magnetocaloric Properties of Double perovskiteoxide LaCaMnCoO6.

Rabindranath Mahato, K. Kamala Bharathi, K. Sethupathi and V. Sankaranarayanan, R. Nirmala, A.K. Nigam and Jagat Lamsal

J. Appl. Phys., 105, 07A908

Year: 2009

Magnetic and magnetoresistive properties of double perovskite oxides RESrMnCoO6 (RE= Nd, La.)

Rabindranath Mahato, K. Sethupathi, V. Sankaranarayanan, K. Kamala Bharathi, R. Nirmala, A.K. Nigam and S. K. Malik

IEEE Trans. Magnetics, 45, 10

Year: 2009

Dielectric Relaxation Properties of Nanostructured Ce0.8Gd0.1Pr0.1O2-δ Material at Intermediate Temperatures.

Ashok Kumar Baral and V. Sankaranarayanan

Applied Physics Letters, 94, 074101

Year: 2009

Ion transport and dielectric relaxation studies in nano-crystalline Ce0.8Ho0.2O2-δ material.

Ashok Kumar Baral and Sankaranarayanan,V.

Physica B, 404, 1674

Year: 2009

Optical switching properties of RCo2-type alloy hydride based solid state device.

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

J. Appl. Phys, 104, 064504

Year: 2008

Influence of hydrogen absorption and desorption on structural properties of Dy1-xMmxCo2 alloys.

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

J. Physics: Condensed Matter, 20, 255224

Year: 2008

Structural and hydriding-dehydriding properties of Ho1-xTixCo2 alloys.

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

Materials Science & Engineering A, 472, 293-298

Year: 2008

Hydrogen-induced and A-site substitution dependent structural properties of AB2–type (Ho1-xAx)Co2–Hydrogen system (A = Mm and Ti).

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

J. Alloys and Compounds, 458, 574-578

Year: 2008

Thermodynamic and kinetic properties of Ho1-xTixCo2–hydrogen system.

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

J. Physics & Chemistry of Solids, 69, 1869-1876

Year: 2008

Magnetic properties of Ho1-xMmxCo2 (x = 0, 0.1, 0.2, 0.3 and 0.4) alloys and their hydrides.

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

J. Magnetism and Magnetic Materials, 320, 2237-2240

Year: 2008

Kinetics of hydrogen absorption in Ho1−xMmxCo2 alloys

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

J. Alloys and Comp. 448, 159

Year: 2008

Hydrogen absorption and desorption properties of Ho1-xMmxCo2alloys

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

Int. J. Hydrogen Energy 32, 2480-2487

Year: 2007

Diffusion of hydrogen in cubic Laves phase Ho1-xMmxCo2 (x = 0, 0.2 and 0.4) alloys.

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

Int. J. Hydrogen Energy 32, 2965-2970

Year: 2007

Thermodynamic and hydrogen-induced structural properties of Ho1-xMmxCo2-hydrides.

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

J. Phys. D: Appl. Phys40, 1183-1189 (2007)

Year: 2007

Influence of hydrogen absorption on structural and electrical transport properties of Ho1-xMmxCo2 alloys

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

J. Appl. Phys.102, Issue 6, 063706(1-8) (2007)

Year: 2007

Temperature and concentration dependent electrical resistivity of Ho1-xTixCo2-hydrogen system.

G. Srinivas, V. Sankaranarayanan and S. Ramaprabhu

Solid State Sciences9 , 973-979 (2007)

Year: 2007

Magnetic and Electrical transport properties of DyxGd5-xSi2Ge2 (x = 0.0, 1.5, 2.5, 3.0, 3.5, 4.5 and 5.0) Compounds

R. Nirmala, V. Sankaranarayanan, K. Sethupathi, A. V. Morozkin, Amish G. Joshi and S. K. Malik

J. Magnetism and Magnetic Materials 309, 212

Year: 2007

Synthesis of single phase Ce doped nanocrystalline LaMnO3

C. Krishnamoorthy, K. Sethupathi and V. Sankaranarayanan

Materials Letters61, 3254-3257, (2007)

Year: 2007

Magnetic and magnetotransport properties of Ce doped nanocrystalline LaMnO3.

C. Krishnamoorthy, K. Sethupathi, V. Sankaranarayanan, R. Nirmala and S.K. Malik

J.Alloys and Compounds 438, 1-7 (2007)

Year: 2007

Magnetic and magnetoresistivity properties of nanocrystalline Nd0.7Sr0.3MnO3.

C. Krishnamoorthy, K. Sethupathi, V. Sankaranarayanan, R. Nirmala and S.K. Malik

Journal of Magnetism and Magnetic Materials 308,28-34(2007)

Year: 2007

Particle size effect on magnetotransport properties of nanocrystalline Nd0.7Sr0.3MnO3

C. Krishnamoorthy, K. Sethupathi, V. Sankaranarayanan, R. Nirmala and S. K. Malik

J. Nanoparticle Research DOI 10.1007/s11051-006-9101-x (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

Journal of Magnetisnm and Magnetic Materials 303, e342-e346 (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

Journal of Applied Physics, 99,08Q315-1 to 08Q315_1-3 (2006).

Year: 2006

Study of the magnetic behavior of single-crystalline Nd0.5Sr0.5MnO3

R. Venkatesh, R. Nirmala, G. Rangarajan, S. K. Malik, and V. Sankaranarayanan

Journal of Applied Physics, 99,08Q311-1 to 08Q311_1-3 (2006)

Year: 2006

Electrical and magnetotransport properties of Nd-based manganite nanoparticles

C. Krishnamoorthy, K. Sethupathi, V. Sankaranarayanan, R. Nirmala, and S. K. Malik

Journal of Applied Physics, 99,08Q310-1 to 08Q310_1-3 (2006).

Year: 2006

Electrical transport properties of Dy0.5Gd4.5Si2Ge2

R. Nirmala, V. Sankaranarayanan, K. Sethupathi, A.V. Morozkin, Y. Yamamoto and H. Hori

Physica B 373, 120-123 (2006)

Year: 2006

A-site dependent percolative thermopower and Griffiths phase in Pr0.7-xHoxSr0.3MnO3 (x = 0.0, 0.04, 0.08 and 0.1)

N. Rama, M. Opel, V. Sankaranarayanan, R. Gross, S.B. Ogale, T. Venkatesan, and M.S. Ramachandra Rao

Journal of Applied Physics, 97,10H713-1 to 10H713-3 (2005).

Year: 2005

Magnetization and neutron diffraction studies on Dy5Si2Ge2

R. Nirmala, V. Sankaranarayanan, K. Sethupathi A. V. Morozkin, Q. Cai and Z. Chu, J. B. Yang, W. B. Yelon, S. K. Malik

Journal of Applied Physics, 97,10M314 (2005).

Year: 2005

Effect of A-site disorder on the percolative transport of Pr0.7-yHoySr0.3MnO3, (y=0.0, 0.04, 0.08 and 0.1)

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

Journal of Magnetisnm and Magnetic Materials 292, 468-475 (2005).

Year: 2005

A-site-disorder-dependent percolative transport and Griffiths phase in doped manganites

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

Physical Review B 70, 224424-1 to 224424-5 (2004).

Year: 2004

Effect of rare earth ion substitution on the magnetic and transport properties of Pr0.7RE0.04Sr0.26MnO3 (RE = Er3+, Tb3+, and Ho3+)

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

European Physics Journal B 38, 553-557 (2004).

Year: 2004

Study of magnetic properties of A2B'NbO6 (A=Ba,Sr,BaSr; and B'=Fe and Mn) double perovskites

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

J Journal of Applied Physics. 95, 7528-7530 (2004).

Year: 2004

Magnetism of R2Ti3Ge4(R=Sc, Gd, Tb,, Dy, Ho and Er)

R. Nirmala, V. Sankaranarayanan, K. Sethupathi. G. Rangarajan, A.V. Morozkin, C. Kundaliya Darshan S.K. Malik

Journal of Applied Physics, 95, 7079-7081 (2004).

Year: 2004

Magnetism in RMn4Al8 (R = Sc; Sm, Tb, Dy and Ho) compounds: possible role of Mn

R. Nirmala, V. Sankaranarayanan, K. Sethupathi, T. Geethakumary, M.C. Valsakumar, Y. Hariharan, A.V. Morozkin

Physica B 329-333, 673-74 (2003)

Year: 2003

Magnetic properties of Er2Mn3Si5

R. Nirmala, V. Sankaranarayanan, K. Sethupathi, A. V. Morozkin, Z. Chu, W. B. Yelon, S. K. Malik, Y. Yamamoto and H. Hori

Journal of Alloys and Compounds, 347 9-13 (2002)

Year: 2002

Electrical transport and magnetic ordering in R2Ti3Ge4 (R = Dy, Ho and Er) compounds

R. Nirmala, V. Sankaranarayanan, K. Sethupathi, A. V. Morozkin, T. Geethakumary and Y. Hariharan

Pramana – Journal of Physics 58 1101-1104 (2002)

Year: 2002

Magnetic Structure of Tb2Mn3Si5

R. Nirmala, A. V. Morozkin, M. Hofmann, V. Sankaranarayanan, K. Sethupathi, Y. Yamamoto and H. Hori

Journal of Alloys and Compounds 335 43-47 (2002)

Year: 2002

New materials for Magnetic refrigerator Applications

R. Nirmala, V. Sankaranarayanan, K. Sethupathi and A.V. Morozkin

Key Engineering Materials 227 113-118 (2002)

Year: 2002