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Dr. J KRISHNAMURTHY

ABOUT
NAME: Dr. J KRISHNAMURTHY

MS: Sri Venkateswara University

E- MAIL: krishnamurthy@nitandhra.ac.in

POSITION: Assistant Professor

PhD: IIT Kharagpur

PHONE: +91 7975624892


AREAS OF INTEREST: Multiferroics, Strongly correlated systems, Magnetism at the nanoscale, Multifunctional properties of magnetic oxides, Low temperature physics, Growth and characterization of semiconductor hetrostructures, Interface induced magnetism in magnetic bilayers.

EXTERNAL LINK: https://scholar.google.co.in/citations?user=cr9s54oAAAAJ&hl=en
BRIEF

Dr. J KRISHNAMURTHY

 Assistant Professor,

Department of Physics,

NIT -Andhra Pradesh-534101

PERSONAL

 Nationality                                :  Indian

Permanent  address             :  S/O J Ramaswamy

                                                               Badikayala Palli (Post & Vill)

                                                               B. Kothakota (MD), Chittoor (DT)

                                                                Andhrapradesh-517370, India.

 E-Mail                                      :  krishnamurthy@nitandhra.ac.in            krishna.jk1@gmail.com,

Phone                                       :  +917975624892

                       

EDUCATION

 Ph. D. in Physics, awarded in March 2015.

Cryogenic Engineering Centre,

Indian Institute of Technology, Kharagpur-721302, India.

 Title of thesis:

Multiferroicity, Phase separation and magnetic field driven

Phenomena in R2CoMnO6 (R= La, Gd,Y) and La2- xSrxCoMnO6systems”  M. Sc. in Physics, 2006.

Sri Venkateswara University, Tirupati, Andhra Pradesh-517507, India.

In First Class, Distinction (Specialization – Advanced Microprocessors and Electronics).

 B. Sc. in Physics (Three-year degree course), 2003.

Sri Venkateswara Arts College, Tirupati, Andhra Pradesh-517507, India.

In First Class, Distinction (Physics, Computer Sciences, and Mathematics)

 

 AWARDS/FELLOWSHIP/RECOGNITION

 INSPIRE FACULTY 2016 Award from Department of Science & Technology, Govt. of India.

 Dr. D. S. Kothari Post-doctoral Fellowship 2015, from University of Grants Commission, New Delhi.

 Best Presentation Award, for the work “Size-dependent magnetic properties of La2CoMnO6” in research scholar’s day -2012 in Cryogenic Engineering Centre, IIT Kharagpur.

 Best Poster Presentation Award, for the paper “Magnetocaloric effect in La2CoMnO6 double perovskite system”, at DAE-SSPS-2011, SRM University, Chennai, India.

 Received Junior Research Fellowship (JRF) to work on the project entitled “Synthesis and multiferroic properties of AFe12O19 (A= Ba, Sr) nanoparticles reinforced polymer nanocomposites for space applications (NAS), sponsored by CSIR, New Delhi, from July-2009 – June 31st -2010 at Cryogenic Engineering Centre, IIT Kharagpur.

Qualified “National Eligibility Test (NET)-December 2009 in “Physical Sciences” and awarded “CSIR-UGC-Junior Research Fellowship (JRF)” to carry out advanced research in reputed institutes of India.

 Qualified “Graduate Aptitude Test in Engineering (GATE)-2009 in Physics.

 

 RESEARCH INTERESTS

 Magnetic-field-driven phenomena in novel multiferroic materials:

  (i)    Magnetic and dipolar ordering and the so-called "multiglass" behavior

 (ii)   Metamagnetism and phase separation

 (iii)  Magnetocaloric, electrocaloric and multicaloric effect in multiferroic materials

 (iv)  Magnetic order drove ferroelectricity

 (v)   Conventional and spontaneous exchange bias effects, and 

 (vi)  Magnetotransport and Magnetodielectric properties at cryogenic temperatures

 

Synthesis of Oxide Materials

 Polycrystalline samples in bulk and nanoparticles form and thin films and investigating their structural, magnetic and magnetotransport and multiferroic properties.

 

EXPERTISE

 Thin film deposition techniques: Pulsed laser deposition, DC and RF sputtering, Thermal Evaporation.

 Synthesis techniques: Solid-state synthesis, Solution combustion, Sol-Gel.

 Characterization:

  • Impedance spectroscopy
  • High temperature and low temperature AC, DC magnetotransport
  • X-ray diffraction for bulk and thin films
  • Magnetometry using Magneto-Optic Kerr effect
  • Magnetometry with Physical Property Measurement system and SQUID
  • Transport and Magnetotransport and multiferroic properties with Physical Property Measurement system
  • Scanning Electron Microscopy
  • Raman, and UV-Visible spectroscopy

 Skills in maintaining vacuum and cryogenic systems.

 

PROFESSIONAL EXPERIENCE

 Assistant professor at NIT – Andhra Pradesh from July 2018  

 DST Inspire Faculty of Physics, at Indian Institute of Science, Bengaluru, from March 2016 to July 2018

 Dr D S Kothari post-doctoral fellow at IISc Bengaluru from September 2015 to 01 March 2016 in Magnetism group.

 The experience of teaching physics at an undergraduate and pre-university level for two years (2006-2008).

 Worked as JRF on hexagonal ferrites and polymer composites for Space applications at Cryogenic Engineering Centre, Kharagpur, India (2009-2010).

 Having two years (2006-2008) teaching experience as Lecturer for graduation students, worked at Sri Srinivasa Degree College, Madanapalli, Andhrapradesh, India.

 

Details of M.Sc/UG (guided)

M. Sc. guidance Undergraduate guidance

3 (completed),  3 (completed) 


 (a) Publications in peer-reviewed Journals:

  1.    J Krishnamurthy, N Nileena, V S Vishnugopal, P S Anil Kumar, "Partially-disordered to frozen-state crossover induced magnetocaloric properties of the antiferromagnetic one-dimensional spin-chain Sr3CoIrO6", Materials Research Express, 6, 056104 (2019).
  2. S Mallesh, J Krishnamurthy, A K Das, A Venimadhav, D C Kakarla, "Anomalous freezing of dielectric polarons near magnetic ordering in multiferroic La0.5Bi0.5FeO3" Ceramics International, 45(5), 6250-6254 (2019).
  3. K Devi Chandra Sekhar, J Krishna Murthy, J. -Y Lin, H C Wu, H D Yang, "Observation of oscillating like magnetocaloric effect in  multiferroic  Ni0.95Zn0.05CrO4", Journal of Alloys and  Compounds, 771, 15, 674-679 (2019).
  4. J Krishna Murthy and P S Anil Kumar, Interface-induced spontaneous positive and conventional negative exchange bias effects in bilayer La0.7Sr0.3MnO3/Eu0.45Sr0.55MnO3 heterostructures”, Scientific Reports (Nature), 7, 6919 (2017).
  5.       J Krishna Murthy, G Jyotsna, Nileena Nandakumaran, P S Anil Kumar, Strain-induced ferromagnetism, absence of exchange bias effect and magnetoresistance in La1.5Sr0.5CoMnO6 epitaxial thin films” Journal of Applied Physics 122 (6), 065307.
  6.       J. Krishna Murthy, and A. Venimadhav, “4f-3d exchange coupling induced exchange bias and field induced Hopkinson peak effects in Gd2CoMnO6, Journal of Alloys and Compounds, 719, 341-346 (2017).
  7.       K. Devi Chandrasekhar, J. Krishna Murthy, A. Venimadhav and H. D. Yang, “Magnetostructural coupling and Ferroelectricity in Ni1-xZnxCr2O4 solid solutions", Physical Review B 94, 205143 ((2016).
  8.       N Vijay Prakash Chaudhury, J Krishna Murthy, A. Venimadhav, “Absence of dipolar ordering in Co doped CuO”, Solid state communications, 247, 36-39 (2016)
  9.       Sadan Chandra, S Sujoy, Dutta Alo, J Krishna Murthy, Venimadhav, T. Sinha, " Magnetodielectric effect and the ferroelectricity in ordered double perovskite Lu2NiMnO6", Journal of Applied Physics, 120, 134102 (2016)
  10.       J. Krishna Murthy, K. Devi Chandrasekhar and A. Venimadhav, "Observation of Griffiths-like phase and its tunability in La2Ni1-xCoxMnO6 (0<x<1) nanoparticles", Journal of Magnetism and Magnetic Materials, 418, 15 2016.
  11.       J. Krishna Murthy, K. D. Chandrasekhar, H. C. Wu, H. D. Yang, J. Y. Lin and A. Venimadhav, “Antisite disorder driven spontaneous exchange bias effect in La2-xSrxCoMnO6 (0≤x≤1)” Journal of Physics: Condensed Matter, 28 (8), 086003, 2015.
  12.       J. Krishna Murthy, K. Devi Chandrasekhar and A. Venimadhav, “Giant magnetocaloric effect in Gd2NiMnO6 and Gd2CoMnO6 ferromagnetic insulators” Journal of Physics D. Applied Physics, 48, 355001 (2015).
  13.   J. Krishna Murthy, K. Devi Chandrasekhar, S. Murugavel, and A. Venimadhav, “Investigation of the intrinsic origin of MD effect in La2CoMnO6: Role of magnetic disorder effects” Journal of materials chemistry C, 3, 836 (2015).
  14.   J. Magesh, P. Murgavel, J. Krishna Murthy, V. Adya, and W. Prellier, “A study of magnetic ordering in multiferroic hexagonal Ho1-xDyxMnO3” Journal of Applied Physics, 117, 836 (2015).
  15.   J. Krishna Murthy, K. D. Chandrasekhar, H. C.Wu, H. D. Yang, J. Y. Lin and A. Venimadhav  “Metamagnetic behavior and effect of field cooling on sharp magnetization jumps in multiferroic Y2CoMnO6” Europian physics letters, 108, 27013 (2014).
  16.   J. Krishna Murthy and A. Venimadhav, “Multicaloric effect in Y2CoMnO6 multiferroic system”. Journal of Physics D. Applied Physics, 47, 445002 (2014).
  17.   J. Krishna Murthy and A. Venimadhav, “Magnetization reversal phenomena and bipolar switching in La1.9Bi0.1FeCrO6”, Physica B, 448, 162 (2014).
  18.   J. Krishna Murthy and A. Venimadhav, “Giant zero field cooled spontaneous exchange bias effect in phase separated La1.5Sr0.5CoMnO6” Applied Physics Letters, 103 252410 (2013).
  19.   J. Krishna Murthy and A. Venimadhav, “Reentrant cluster glass behavior in La2CoMnO6 nanoparticles” Journal of Applied Physics, 113,163906 (2013).
  20.   J. Krishna Murthy, C. Mitra, S. Ram, A. Venimadhav, “Temperature dependent magnetic and dielectric properties of M-type hexagonal BaFe12O19 nanoparticles”. Journal of alloys and compounds, 545, 225 (2012).
  21.   J. Krishna Murthy and A. Venimadhav, “Magnetodielectric behavior in La2CoMnO6 nanoparticles” Journal of Applied Physics, 111, 024102 (2012).
  22.   K. Devi Chandrasekhar, S. Mallesh, J. Krishna Murthy, A. K. Das and A. Venimadhav, “Role of defects and oxygen vacancies on dielectric and magnetic properties of Pb2+ ion doped LaFeO3 polycrystalline ceramics”, Physica B, 448, 304 (2014).
  23.   K. Devi Chandrasekhar, J. Krishna Murthy, A. K. Das and A Venimadhav, “Dielectric and Magnetodielectric properties of R2NiMnO6 (R= Nd, Eu, Gd, Dy, and Y)”, Journal of American Ceramic Society, 97, 2858 (2014).
  24.   Venimadhav, Devi Chandrasekhar, and J. Krishna Murthy “Intrinsic and extrinsic contributions to magnetodielectric effect in double perovskite La2CoMnO6 nanoparticles”, Applied nano science, 3, 25-28 (2013).

(b) Conference Proceedings:

  1.    J. Krishna Murthy and A. Venimadhav, “Unusual magnetodielectric response in La2CoMnO6 nanoparticles” AIP Conference Proceedings, 1447, 1239 (2012).
  2.    J. Krishna Murthy and A. Venimadhav, “Magnetocaloric effect in double perovskite La2CoMnO6” AIP Conference Proceedings, 1447, 1235 (2012). [This work was received the “Best Poster Award”].
  3.    J. Krishna Murthy and A. Venimadhav, “Size-dependent magnetic properties of double perovskite La2CoMnO6 nanoparticles”, AIP Conference Proceedings, 1536, 1053 (2013).

 (c) Publications under review/to be submitted:

  1.    Ch. Venkatesh, V.Srinivas, J. Krishna Murthy, A. Venimadhav, V. Raghavendra Reddy and V. V. Rao, “Magnetic and electrical transport in Boron doped Fe2VAl Heusler alloy”, under review in Journal of Magnetism and Magnetic Materials.
  2.    J. Krishna Murthy and A.Venimadhav, “Magnetic-field-induced spin-glass and exchange bias effect in Re2CoMnO6”.
  3.    J Krishna Murthy and P S Anil Kumar, Giant Field induced Exchange bias like shift in magnetization of one dimensional spin chain Sr3NiIrO6.

 Books/Chapter

Book on “Multiferroicity, Phase separation and Magnetic Field Driven Phenomena” published by LAMBERT Academic Publishing Group, 2016.

 

MEMBERSHIP OF PROFESSIONAL BODIES

 Life member of Magnetic Society of India (MSI). 

  

REFEREES

 

1. Prof. Venimadhav Adyam

     M.Sc. Ph.D.

    Associate Professor,

    Cryogenic Engineering Centre,

    Indian Institute of Technology-Kharagpur,

    Kharagpur-721302, India

    Tel: 09775021822

     E-mail: venimadhav@hijli.iitkgp.ernet.in

 

2. Prof. P. S. Anil Kumar,

     M.Sc., Ph. D.

   Associate Professor,

   Department of Physical Sciences,

   Indian Institute of Science, Bengaluru- 560012, India

   E-mail: psanilk@gmail.com , anil@physics.iisc.ernet.in

   Phone No: +91-9483005891

 

3. Prof. S V Bhatt

    Professor & INSA Senior Scientist    

    Department of Physics,

    Indian Institute of Science- Bengaluru-560012, India

    Tel: 080- 2293 2727

    E-mail: svbhat@physics.iisc.ernet.in

 

 

I hereby declare that the information furnished above is true to the best of my knowledge.

 

Date: 18-02-2019                                                                                                                               

(J KRISHNA MURTHY)

Place: NIT-AP, India.