ANOOP NAUTIYAL

Anoop Nautiyal (PhD)

ANOOP NAUTIYAL
E-Mail: anoopnautiyal44@gmail.com
Univ Mail: anoop.nautiyal@etu.univ-tours.fr
GREMAN UMR 7347
UNIVERSITE DE TOURS/CNRS
Parc de Grandmont- Bat. E, Bureau E-1670
20 avenue Monge, 37200 TOURS, FRANCE
Mob: +33-695622036
Fax : +33 247 36 71 21

Current Study: PhD: GREMAN Lab- University of Tours, France (October 2012 to present)

PhD Topic: "Oxide dielectric materials synthesis and characterization of their physical properties".
CaCu3Ti4O12 (CCTO) is the center of attractions since more than 20 years because of it,s high permitivity. With the miniaturization of microelectronic devices, the importance of high permittivity materials is increasing rapidly. Dielectric materials can be applied to several devices, including dynamic random access memory (DRAM), ceramic capacitors, and microwave devices. In fact, in both DRAMs as and metal-oxide semiconductor field-effect transistor (MOSFET), the dielectric is often thin enough that the leakage current increases to an intolerable level. In general, previous studies have used a gate oxide such as SiO2 for memory applications. The only notable drawback of SiO2 is its relatively low dielectric constant. The concept of using high dielectric constant materials to reduce the tunneling current was presented. The introduction of high dielectric constant materials is becoming more and more urgent, and finding a suitable material to replace SiO2 is becoming a major issue in current research. CCTO is a high dielectric constant ceramic but dielectric loss for it is still higher (0.1 at 1 kHz) to be used for capacitor application. Now there are various ways to reduce loss of this material. Solid state mixing route has been chosen and when we start mixing two starting powders, we make sure that they are single phase. So the further study of composites will be easier.
As a PhD student, my main object is to find out the co-relation between CCTO composites structure (phases, grains/grain boundaries size and contents) and its dielectric/electrical properties I am trying to mix few oxides (e.g. MgO, MgTiO3, HfO2 etc) with CCTO in order to reduce it's loss and then studying it further. The result is very encouraging and we are able to reduce loss of CCTO (<0.04 at 1 kHz at room temperature) without compromising with dielectric constant. Attempt has been made in this thesis to separate the role of grain and grain boundaries in determining dielectric properties. Dielectric properties has been tried to relate to phases present in composite, micro-structure, Grain/Grain boundary size etc.

M. Tech Project: Nanostech Lab Indian Institute of Technology (IIT) Delhi, India- June 2011-May 2012
Project Topic: “Study on field emission characteristics and imaging of Carbon Nanotubes”

Brief Description: My project was on synthesis of Carbon nano tubes (CNT) by thermal CVD system and synthesis of wide bandgap semiconductor ‘ZnO’ by spin coating method for phosphor application. For characterization of CNT we use XRD, SEM, TEM, HRTEM and Raman Spectroscopy.
At the end we combine these two objects, CNT and ZnO phosphor for field emission imaging here we use CNT as a cathode and ZnO as an anode. To observe the V-I characteristics of CNT we used metal as an anode in place of ZnO in field emission experiment.

Publications:
1. Article Published in International Journal of Advanced and Nano Materials (IJANM): Title- Dielectric properties of CCTO/MgTiO3 composites. A Nautiyal*, C. Autret, C. Honstettre, S. De Almeida-Didry, M. El Amrani, S. Roger and A. Ruyter.
2. Article submitted in Journal of European Ceramic Society (JECS) : Title- Local analysis of the grain and grain boundary contributions to the bulk dielectric properties of Ca(Cu3-yMgy)Ti4O12 ceramics : Importance of the electrical barrier at the grain boundary. A Nautiyal*, C. Autret, C. Honstettre, S. De Almeida-Didry, M. El Amrani, S. Roger and A. Ruyter.
3. Article currently in progress: CCTO/HfO2 : Future Capacitor. A Nautiyal*, C. Autret, C. Honstettre, S. De Almeida-Didry, M. El Amrani, S. Roger and A. Ruyter.

Relevant Courses done:
I have studied very useful courses in Solid state Materials program at IIT Delhi. One special course was Material’s Technology in which I learnt about material’s phase diagrams, processing, oxidation, thermal treatments, Magnetic, thermal and electrical properties of materials, alloys and their strength and hardening. Second most important course was Characterization of Materials in which we learnt about most of the characterization techniques. Other important courses were Electronic Properties of Material, Physics of Semiconductor Devices, IC Technology, Semiconductor Device Technology, Semiconductor Optoelectronics, Thin film technology, Nanostructured Material, Quantum Hetrostructure, Vacuum Science and Cryogenics.

Achievements/ Participation/ Awards:
• Article Published in IJANM: Title- Dielectric properties of CCTO/MgTiO3 composites
• Article submitted in JECS : Title- Local analysis of the grain and grain boundary contributions to the bulk dielectric properties of Ca(Cu3-yMgy)Ti4O12 ceramics : Importance of the electrical barrier at the grain boundary
• Oral Presentation at ICANM Canada 11-14 August 2014 - Dielectric properties of CCTO/MgO and CCTO/MgTiO3 composites
• Abstract accepted for Oral Presentation at AMWC Stockholm Sweden 23-26 August 2015 - Dielectric properties of CCTO/HfO2 composites
• Abstract accepted for poster Presentation at MC-12 –International Conference on Material Chemistry 20 - 23 July 2015 at University of York, UK Stockholm – Dielectric/Electrical properties of CCTO/MgO composites.
• Oral Presentation at Réunion MATV2L - Oxide Dielectric Materials Synthesis and Characterization of their Physical Properties 13-14 Febuary 2014
• Poster Presentation at ICANM Canada 11-14 August 2014 - Dielectric properties of CCTO/MgO and CCTO/MgTiO3 composites
• Poster Presentation at Sol Gel Conference Tours 2014 -Composite Dielectric Materials Synthesis and Characterization of their Properties 13-15 Mai 2014
• Joined workshop on Recent Trends in Nanophotonics; 30th September and 1st October 2011
• Graduate Aptitude Test of Engineering in Physics (GATE-2010) Qualified with 95.12 percentile and All India Rank 272. GATE is an all India entrance examination for selecting students in Research and M. Tech. program in IIT’s.
• CSIR (NET) Qualified: National Eligibility Test (NET) in Physics is an all India level test conducted by Council for Scientific and Industrial Research (CSIR) to select highly motivated students for Research and Lectureship.
• U-SET (Uttrakhand State Eligibility test)) Qualified- 2012
• Participated in international workshop on ‘Recent trends in Nanophotonics’ held in Indian Institute of Technology Delhi, India on 30th September and 1st October 2011.
• First Position in M.Sc. Physics in the College.

Funding Achieved:
Got funding from Ecole Doctoral for attending conference at ICANM Calgari Canada 11-14 August 2014.

Teaching Experience:
One year teaching assistance (TA) experience in M.Tech. at IIT Delhi, India.

Educational Qualification:

• Doctor of Philosophy (PhD) in "Oxide dielectric materials synthesis and characterization of their physical properties". (Started from October 2012)
University : Université François-Rabelais de Tours, France

• Master of Technology (M.Tech.-2010-2012) in Solid State Materials
Institution : Indian Institute of Technology Delhi (IIT Delhi), India
CGPA : 8.60 on a 10- point scale

• Master of Science in Physics(2007-2009 First Class)

Institution : S.G.R.R. (PG) College Dehradun, Uttarakhand, India
University : H.N.B. Garhwal University Srinagar (Garhwal), Uttrakhand, India


• Bachelor of science (June 2004-2007- First Class)

Institution : S.G.R.R. (PG) College Dehradun, Uttarakhand, India
University : H.N.B. Garhwal University Srinagar (Garhwal) Uttrakhand, India

Technical Skills:

Characterization Techniques Used: Hands on experience on Scanning electron Microscopy (SEM), X- Ray Diffraction (XRD , EBSD, Raman Spectroscopy, Photoluminescence Spectroscopy (PLS), Dilatometer. Atomic Force Microscopy (AFM).
Deposition Techniques Used: Thermal evaporation, Spin coating, Spray Pyrolysis, Thermal Chemical vapor deposition, Solid state route.

Experience of working in Clean Room facilities.

Computer skills:
• Operating Systems : WINDOWS 98/2000/XP, DOS.
• Language : Basics of C, MS-Office, Origin.


Experiments Done in M Tech:

1- Phase diagram:
i. Determine Pb-Sn phase diagram.
2 - Thermistor:
i. Preparation of Mn3O4 or Mn2O3 various combination of oxide, cylindrical disk shape 1-2 mm dia.
ii. Measurement of resistance with temperature.
3- Ferrite:
i. Prepare ferrite in the form of toroids.
ii. Measure disaccomodation factor and Curie temperature.
4 - Varistor Experiment:
i. Preparation of ZnO based varistor.
ii. Measurement of I-V characteristics and deduce break down voltage.
5- ZnO Film:
i. Deposit thin film of ZnO by spin coating method on glass substrate.
ii. Measure transmission spectra to find band gap of ZnO.
6- Superconductor:
i. Prepare YBCO superconductor of cylindrical shape 1-2 mm diameter.
ii. Measure critical temperature, Tc.
7- X-Ray Fluorescence:
i. Prepare pellets of mixture of different compounds.
ii. To Detect X-Ray Fluorescence.
8- Spray Pyrolysis:
i. Deposit CdS thin film on glass substrate by spray pyrolysis.
ii. Measure V-I characteristics at various light intensities.
9- Kelvin Probe:
i. Measure work function of different materials by Kelvin probe method.
10- Thermal evaporation method:
i. Deposit thin film of Bi by thermal evaporation.
ii. To Measure resistivity by four-probe method and Hall measurement.
11- Dielectric Constant:
i. Find the dielectric constant of given material with frequencies.
ii. Find the Curie temperature and thermal hysteresis curve.
12- Simulation of ion-solid interaction:
i. To Plot electronic energy and nuclear energy losses as a function of depth inside a solid.
ii. Simulation of the interaction of a low energy ion with a solid for different number of ions and plot ion and damage distributions as a function of depth inside the solid.
iii. Simulation of the interaction of a high energy ion with a solid for different number of ions and plot ion and damage distributions as a function of depth inside the solid.

Extra Curriculum Achievements:
• Attended 10 days camp in rural area in Dehradun, India as a part of National service Scheme (NSS) and did survey on economic and health condition of people living there.
• Participated in various debates at university level
• Wrote poems which were published in College magazine.
• Played badminton competition for Science and technology department at Tours, France

Languages:
• English (Speaking and writing both skills)
• Hindi (Native Speaker)
• French (basic level-I can speak better than I write)
• Garhwali (Native Speaker)

Strengths:
• Hard working & self-confidant.
• Friendly nature & Ability to work in a team.
• Ready to travel

Hobbies:
• Playing Cricket, Badminton, Chess.
• Keen interest in Music.
• Travelling