Welcome

Thanks for visiting our group webpage. Our area of research broadly comes under experimental condensed mater physics. More specifically, we work in the domain of Spintronics, Nanomagnetism and Spin dynamics. We investigate magnetic thin films, nanostructures and nano-devices using experimental and simulation techniques.

Magnonics
Magnon spintronics or magnonics − magnetic analogue to photonics − is emerging as a promising post-CMOS (complementary metal-oxide semiconductor) information processing technology where magnons (quanta of spin waves) carry the information instead of charge. We focus on the control of such magnetization dynamics for spintronic and microwave devices. We are primarily interested in ultra-thin magnetic films including multilayers, novel interfaces and patterned nanostructures in order to explore emerging phenomena such as inverse spin Hall effect, spin orbit torque, spin pumping etc. For more information, please check our review on this subject, click here.

Microwave magnetics
There is a growing civilian and military demand in RF based systems for effective and new ways of utilizing the increasingly crowded electromagnetic spectrum. Examples of such RF systems include smartphones to radars. Microwave magnetics research involve in the development of suitable materials for RF applications. Magnetic ferrites are well known for their extraordinary RF performance in a wide frequency range. However, requirement of a bias field for activating the passive RF devices make them bulky and therefore, signal processing is executed off the chip away from the active components. Certain magnetic thin films and arrays of magnetic nanostructures with reconfigurable microwave properties offer bias-field-free solution and on-chip integration of the microwave components. We are interested in such self-biased nanomagnets and magnetic thin films for re-programmable microwave devices. For more information, please check our review on this subject, click here.

News and updates from the lab
​Last updated on: June 2023:
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  • June 2023: Welcome to Ms. Nivedita and Ms. Rasmiya who joined as project interns.
 
  • June 2023: Congratulations to Mr. Brahmaranjan and co-authors for their publication in Thin Solid Films based bias-free spin dynamics in an exchange biased system. 
 
  • May 2023: Dr. A. Haldar visited Sendai, Japan to attend and chair a session at INTERMAG 2023.
 
  • May 2023: Mr. Brahmaranjan and Mrs. Mahathi visited Sendai, Japan to attend and present their works at INTERMAG 2023.
 
  • May 2023: Congratulations to Ms. Devapriya and co-authors for their publication in Proc. Natl. Acad. Sci., India, Sect. A Phys. Sci. based on cylindrical nanowire dynamics. 
 
  • May 2023: Congratulations to Mrs. Mahathi and co-authors for their publication in Nanotechnology based on spin dynamics in artificial spin ice nanostructures. 
 
  • May 2023: Congratulations to Ms. Krishnanjana and co-authors for their publication in J. Phys. D: Appl. Phys. based on skyrmion dynamics. 
 
  • Mar 2023: Congratulations to Mr. Brahmaranjan and co-authors for their publication in J Supercond. Nov. Magn. based on bias-free spin dynamics in an exchange bias system. 
 
  • Mar 2023: Congratulations to Dr. Bibek and co-authors for their publication in Nanotechnology based on skyrmion based majority logic gate. 

  • Mar 2023: Dr. A. Haldar (co-PI) received CRG-SERB grant to develop Sputtering system for studying skyrmions.
 
  • Feb 2023: Congratulations to Mr. Bibek for successfully defending his PhD thesis. We are grateful for his enormous contribution for developing the lab and we are proud of his achievements. Best wishes.
 
  • Feb 2023: Congratulations to Mr. Sudeep and co-authors for their publication in AIP Advances based on NdFeB melt-spun ribbons. 

  • Jan 2023: Dr. A. Haldar (PI) received CRG-SERB grant to develop Brillouin light scattering experiment for studying spin dynamics and microscopy.
 
  • Oct 2022: Check out our review on functional magnetic nanostructures in Materials Today Electronics. Click here
 
  • Aug 2022: Dr. A. Haldar has joined 'Material Today Electronics' journal as an early career editorial board member.
 
  • July 2022: PhD students Ms. Mahathi and Mr. Bibek visited Warsaw to attend JEMS conference (24-29 July 2022 Poland).
 
  • June 2022: Dr. A. Haldar has joined as Review Editor on the Editorial Board of Quantum Materials (specialty section of Frontiers in Materials).
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  • June 2022: Congratulations to Ms. Mahathi and co-authors for their publication in J. Phys. D: Appl. Phys. based on sub-100nm nanowire dynamics. 
 
  • Apr 2022: Congratulations to Mr. Bibek and co-authors for their publication in ACS Appl. Elec. Mat. based on skyrmion logic.
 
  • Mar 2022: Congratulations to Mr. Brahmaranjan and co-authors for their publication in SSC based on the effect of Ta capping on CoFe films.
 
  • Mar 2022: Congratulations to Mr. Bibek and co-authors for their publication in PSSA based on spin Hall effect in Ta/Py bilayers.
 
  • Feb 2022: Dr. A. Haldar has been recognised as an 'IEEE Senior Member'.
   
  • Nov 2021: Congratulations to Mr. Sriram and co-authors for their publication in Nanoscale based on the effect of seed layer on Ta phase.
 
  • Oct 2021: Congratulations to Manoj and co-authors for their publication in RSC Advances based on the spin pumping at Py/PDI interface.
 
  • Sept. 2021: Congratulations to Mr. B. Krishna for successfully defending his PhD thesis. He is the first PhD student of this group. We are grateful for his enormous contribution for developing the lab and we are proud of his achievements. Best wishes.
 
  • Aug 2021: Congratulations to Ms. Mahathi for her recent publication in JAP based on single and trilayer nanodots using FMR experiments [doi.org/10.1063/5.0060689].
 
  • Aug 2021: Congratulations to Mr. B. Krishna for his recent publication in JMMM based on trapezoid nanomagnets and their reconfigurable microwave operation [doi.org/10.1016/j.jmmm.2021.168431].
 
  • Aug 2021: Our invited perspective on "Functional magnetic waveguides for magnonics" has been published in Appl. Phys. Lett. [doi.org/10.1063/5.0061528].
 
  • July 2021: Dr. A. Haldar has received "DAE - Young Scientist Research Award (DAE-YSRA)".
   
  • June 2021: Congratulations to Mr. B. Paikaray. Our work on skyrmion dynamics in concentric and eccentric nano-ring structures has been accepted in IEEE Trans. Magn. (https://doi.org/10.1109/TMAG.2021.3086487)
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  • April 2021: Mr. B. Panigrahi, Mr. B. Paikaray and Mr. B. Krishna presented their works in INTERMAG 2021 conference.
 
  • April 2021: Dr. A. Haldar has delivered an invited talk at INTERMAG 2021 conference.
 
  • Mar 2021: We have been selected for NIMS International Cooperative Graduate Program (NIMS-ICGP) fellowship.
 
  • Mar 2021: Our sponsored reserach project (ECR-SERB) has received "very good" rating from SERB, India.
   
  • Dec 2020: We welcome Mr. Jhantu Pradhan in our group. He is a joint Ph.D student of Dr. A. Haldar and Dr. Chandrasekhar Murapaka. He has joined the PhD program under CSIR fellowship.
 
  • Dec 2020: We welcome Mrs. Sarwath Sara in our group. She has joined the PhD program under CSIR fellowship.
 
  • Dec 2020: Our invited perspective on "Reconfigurable and self-biased magnonic metamaterial" has been publiahed in J of Appl. Phys (https://doi.org/10.1063/5.0033254). This is also selected as a 'Featured' article.
 
  • Sept 2020: We welcome Mr. Sudeep in our group. He has joined the PhD program under MHRD-DRDO fellowship.
 
  • Sept 2020: We welcome Ms. Devapriya in our group. She has joined the PhD program under MHRD fellowship.
 
  • July 2020: Congratulations to Mr. B. Krishna. Our work on reconfigurable microwave properties of zigzag nanowires has been accepted in J. Phys. D: Appl. Phys (URL: https://doi.org/10.1088/1361-6463/aba571).
     
  • April 2020: Dr. A. Haldar has been recognized as an 'Outstanding Reviewer 2019' from IOP.
 
  • January 2020: Our FMR system (frequency = 2-18 GHz and field = 0 to 3kOe) has been installed and it is fully operational.
 
  • Nov 2019: Dr. A. Haldar was invited as a Guest Editor for 'Frontiers in Physics' journal.
 
  • August 2019: We welcome Ms. Mahati Kuchibhotla in our group. She Has joined the PhD program under MHRD fellowship.
 
  • August 2019: We welcome Mr. Bibekananda Paikaray in our group. He is a joint Ph.D student of Dr. Chandrasekhar Murapaka and Dr. A. Haldar. He has joined the PhD program under INSPIRE fellowship.
 
  • June 2019: Congratulations to Mr. B. Krishna. Our work on three new type of nanomagnets for reconfigurable microwave properties has been published in J. Phys. D: Appl. Phys. (https://doi.org/10.1088/1361-6463/ab24a5)
 
  • May 2019: We welcome Mr. Brahmaranjan Panigrahi in our group. He has joined the PhD program under INSPIRE fellowship.
 
  • Dec, 2018: Dr. A. Haldar has delivered invited talks at ICMAGMA Bhuvaneswar, ICCFM Kolkata, IEEE-ICEE Bangalore and DAE SSPS Hisar conferences.
 
  • Dec, 2018: Mr. B. Krishna has presented his recent work in ICMAGMA Bhuvaneswar, ICCFM Kolkata and DAE SSPS Hisar conferences.
 
  • June 2018: Our work featured on the cover (Click here) of J. Appl. Phys.
   
  • June, 2018: Our work titled "Reconfigurable magnetic and microwave properties of a ferrimagnetic-type artificial crystal" published in J. of Appl. Phys.: https://doi.org/10.1063/1.5032158
   
  • Sept, 2017: Mr. B. Krishna has attended "National Conference on Physics at Small Scales and Advanced Materials - 2017" at HCU to present his recent work.
   
  • July, 2017: Our recent work published in Science Advances. "Isotropic transmission of magnon spin information without a magnetic field", Science Advances, 3, e1700638 (2017). URL: http://10.1126/sciadv.1700638
 
  • June, 2017: Dr. A. Haldar has received Early Career Research Award (ECR-SERB).
 
  • May, 2017: Mr. B. Krishna has attended "Familiarization workshop on nanofabrication technologies" held at IIT Bombay.
 
  • Feb, 2017: Dr. A. Haldar has received prestigious Ramanujan Fellowship.