Education Qualification

MSc PhD
PhD in in Experimental Condensed Matter Physics

A recipient of minor research project funded by UGC (University Grants Commission) to carry out research in the field of magnetic nano materials and has also been a coinvestigator of a major research project on RRAM properties of functional oxides using Ion beam irradiation, funded by IUAC (Inter University Accelerator Center), New Delhi.

Research Interests

thin films of some functional oxides

visited Tokyo Institute of Technology, Japan to work on PLD (Pulsed Laser Deposition) technique.

  1. Dielectric spectroscopy and magnetoelectric coupling in dilute Fe substituted quasi-one dimensional spin chain calcium cobalt manganite films

Nisha  Thankachen, Bhargav Y. Pathak,  Rutvi J. Pandya, U. V. Chhaya,  A. K. Debnath, and U. S. Joshi

Journal of Vacuum Science and Technology. A 41, 013403 (2023); doi: 10.1116/5.0118975

 

  1. Effect of 100 MeV Ag+7 ion irradiation on electrical properties of Ag/La0.7Sr0.3MnO3/Ag planar structures
  2. K.H. Bhavsar, U.S. Joshi, B.V. Mistry, U.V. Chhaya, S.A. Khan and D.K. Avasthi., Solid State Phenomena Vol. 209, pp 18-22 (2014)

 

  1. Synthesis and electrical properties of 1-x(Na0.5K0.5NbO3)-x(CoFe2O4)

Ramesh R. Varma, Purnima S. Sengunthar, Nikhil G. Joshi, M.R Gadhvi, U.V. Chhaya and U.S. Joshi

Solid State Phenomena Vol. 209, 66-69 (2014)

  1. Chhaya, S.A. Khan, D.K. Avasthi and 

Utpal S. Joshi RRAM properties of swift heavy ion irradiated Ag/In2O3/Pt/Si heterostructures

Bhaumik V. Mistry, Sinny J. Trivedi, U.V. 

Radiation Effects & Defects in Solids, Vol. 168, Nos. 7–8, 625–629 (2013)

 

  1. Structural parameters and resistive switching phenomenon study of Cd0.25Co0.75Fe2O4 ferrite Thin films

U.V. Chhaya, B.V. Mistry, K.  H. Bhavsar, M. R. Gadhvi, V. K. Lakhani, K.  B. Modi and   U. S. Joshi

Indian Journal of Pure & Applied Physics, 49, 833 (2011) 

 

  1. Structural investigations of Mn doped BiFeO3 thin films

P.S. Raval, U.V. Chhaya, P. A. Joshi, S. Trivedi and U.S.Joshi

Solid State Physics (India) vol. 53, 694 (2007)

 

  1. Magnetic properties of mixed spinel NiAl2xCrxFe2-3xO4

Urvi V. Chhaya, Bimal S. Trivedi and R. G. Kulkarni

Physics B,262 (1999) 5-12

 

  1. Metal-insulator type transition in aluminium and chromium co-substituted nickel ferrites.

Urvi V. Chhaya and R. G. Kulkarni

Materials letters, 39 (1999) 91-96

 

  1. Magnetic properties of mixed spinel

Urvi V. Chhaya, B. S. Trivedi and R. G. Kulkarni

Hyperfine Interations, 116 (1998) 197-207

 

  1. Magnetic ordering and properties of Nickel ferrite doped with Al3+ and Cr3+ ions
  1. V. Chhaya, B. S. Trivedi, R. G. Kulkarni and D. R. S. Somayajulu

Journal of Materials Science Letters, 18(1999) 1177-1179

 

  1. Magnetic properties of the mixed spinel Co1+xSnxFe2-2xO4

Urvi V. Chhaya and R. G. Kulkarni

Hyperfine Interactions

 

  1. Cation distribution of the system CoAl1+xFe1-xO4 by X-ray and Mossbauer studies 

Bimal S. Trivedi, N. N. Jani, Urvi V. Chhaya, P. B. Pandya and R. G. Kulkarni

Asian Journal of Physics 6 (1997) 236-239

 

  1. Magnetic properties of CoFe2-xCrxO4 synthesized by co-precipitation method
  1. T. Thanki, N. N. Jani, Urvi Chhaya, H. H. Joshi and R. G. Kulkarni

Asian Journal of Physics 6 (1997) 222-22

 

Papers in International Conferences :

 

  1. 100 MeV Ag+7 ion irradiation effects on electrical properties of Li doped NiO films for RRAM applications

U.S. Joshi, P.A. Joshi, S.J. Trivedi, U.N. Trivedi, U.V. Chhaya, S.A. Khan, 

D.K. Avasthi and B.M. Arora

International Conference on Advanced Materials (ICAM 2008), Mahatma Gandhi    University, Kottayam, February 18-21, 2008

 

  1.   Role of Polyethylene Glycol on structural and optical properties of nanostructured NiO         thin films

       Purvi A. Joshi, Sinny Trivedi, Urvi V. Chhaya and U. S. Joshi

International Conference on Advanced Materials (ICAM 2008), Mahatma Gandhi    University, Kottayam, February 18-21, 2008

 

  1. Magnetic properties of transition metal doped epitaxial NiO thin films
  2. V. Chhaya, K. Itaka, Y. Matsumoto, H.  Koinuma and U.S. Joshi

International Conference on Advanced Materials (ICAM 2008), Mahatma Gandhi    University, Kottayam, February 18-21, 2008

 

  1. Symmetrical memristive switching properties of SnO2:Fe transparent thin films

           S.J. Trivedi, K.H. Bhavsar, U.V. Chhaya, U.N. Trivedi, V.G. Joshi and U.S. Joshi

  Proceedings of the MRS fall Meeting, Boston (USA), November 30-December 04, 2009

 

  1. Anomalous behavior of electrical resistance in cadmium substituted cobalt ferrite thin film nanostructures 
  1. B. Chaudhari, H.K. Patel, S.I. Singh, M.R. Gadhvi, K.B. Modi, U.V. Chhaya and U.S. Joshi

International Conference on Recent Trends in Nano and Bio Sciences, Osmania University, Hyderabad, February, 24-26, 2010

 

  1. RRAM Properties of Swift Heavy Ion Irradiatiated Ag/ In2O3/Pt/Si heterostructures

Bhaumik V. Mistry, Sinny J. Trivedi, U.V. Chhaya, S.A. Khan, D.K. Avasthi 

and U.S. Joshi

International Conference on Swift Heavy Ions in Materials Engineering and Characterization (SHIMEC-2012), October 09-12, 2012, Inter University Accelerator Centre, New Delhi

 

  1. Ion Beam Induced Modifications in Mn doped BiFeO3 Thin Film Nanostructures

Urvi V. Chhaya, U.S. Joshi, D.K. Avasthi and O. F. Caltun

International Conference on Nanostructuring by Ion Beams (ICNIB-2013), 

Hotel Gold Palace & Resorts, Jaipur, 23-25 October 2013.

 

  1. Ion Beam Assisted Controlled Defects for RRAM Devices

U.S. Joshi, Sinny J. Trivedi, Komal H. Bhavsar, Bhaumik V. Mistry, Nikhil G. Joshi, 

Urvi V. Chhaya, S. A. Khan and D.K. Avasthi 

International Conference on Nanostructuring by Ion Beams (ICNIB-2013), 

Hotel Gold Palace & Resorts, Jaipur, 23-25 October 2013

 

  1. Controlled Defects Induced Memristive Switching in Oxides 

U.S.Joshi, S. J. Trivedi, K.H.Bhavsar, B.V. Mistry, N.C. Pandya, N.G. Joshi, 

U.V. Chhaya, A.K. Debnath, S.A. Khan, D.K. Avasthi 

Oral Presentation in the 18th International Conference on Radiation Effects in Insulators (18th REI-2015) held at Hotel Royal Orchid, Jaipur, India during October 26-31, 2015

 

Papers in National Conferences :

 

  1. Superparamagnetism in epitaxial thin films of Fe, Cr, Co, Mn and V doped p-type  NiO 
  1. V. Chhaya, P.S. Raval, P.A. Joshi, S. Trivedi, K. Itaka, Y.Matsumoto, H.  Koinuma and  U.S. Joshi

DAE-BRNS 4th National Symposium on Pulsed Laser Deposition of Thin films and Nanostructured Materials (PLD 2007), 03-05 October 2007, Rajkot

 

  1. Resistive Switching Properties of Cadmium Substituted Cobalt Ferrite Thin Films
  1. V. Chhaya, S. I. Singh, H. K. Patel, M. R. Gadhvi, K.  H. Bhavsar, B.V. Mistry,                   K.  B. Modi and U. S. Joshi

Solid State Physics (India), vol. 54, 867 (2009) 

 

  1. Swift Heavy Ion Irradiation induced Memristive Switching in Ag/NiO:Li/Ag Planar Structures 

U.S. Joshi, S.J. Trivedi, K.H. Bhavsar, U.V. Chhaya, V.G.Joshi, S.A. Khan and D.K. Avasthi

Solid State Physics (India), vol. 54, 835 (2009), POSTER AWARD-2009

 

  1. Electrical Properties of pure and Al doped ZnO thin film nanostructures grown by e-beam evaporation 

Mahendra B. Chaudhari, U. S. Joshi and U.V. Chhaya

National Conference on Physics for Tomorrow held at St. Xavier’s College, Ahmedabad during March 03-04, 2011 

 

  1. Synthesis and electrical properties of 1-x(Na0.5K0.5NbO3)-x(CoFe2O4)

Ramesh R. Varma, Purnima S. Sengunthar, Nikhil G. Joshi, M.R. Gadhvi, U.V. Chhaya and U.S. Joshi

National Symposium on Advances in Materials Science and Technology (AMST-2012), Convention Centre, Gujarat University, February 03-04, 2012

 

  1. Structural and electrical characterization of [Ba0.8Sr0.2TiO3]1-y[Cu0.8Zn0.2Fe2O4]y ceramic composites

Abdul Gaffoor, D. Ravinder, B.V. Mistry, Nikhail G. Joshi, U.V. Chhaya, M.R. Gadhvi and U.S. Joshi

National Symposium on Advances in Materials Science and Technology (AMST-2012), Convention Centre, Gujarat University, February 03-04, 2012

 

  1. Effect of 100 MeV Ag+7 ion irradiation on electrical properties of Ag/La0.7Sr0.3MnO3/Ag planar structures

K.H. Bhavsar, U.S. Joshi, B.V. Mistry, U.V. Chhaya, S.A. Khan and D.K. Avasthi

National Symposium on Advances in Materials Science and Technology (AMST-2012), Convention Centre, Gujarat University, February 03-04, 2012

 

  1. Photocatalytic Degradation of Methyl Orange Dye Using SnO2  Thin films

Uditi Popat, U.V. Chhaya, Nirav C. Pandya and U.S. Joshi

8th National Level Science Symposium on Recent trends in Science and Technology-2015, Christ College, Rajkot  (1st price in poster competition)