INDIAN ASSOCIATION FOR THE CULTIVATION OF SCIENCE

Subham Majumdar

Associate Professor

Department of Solid State Physics
Indian Association for the Cultivation of Science

2A and B Raja S. C. Mullick Road
Kolkata 700 032

India

Phone:+91 33 2473 4971 (ext. 317)
Fax: +91 33 2473 2805

E-mail : sspsm2 [at ] iacs.res.in

Academic affiliations

Research scholar at Tata Institute of Fundamental Research, Mumbai, 1996 - 2001
Post-doctoral Research Fellow, University of Warwick, UK, 2001-2004.
Visiting Scientist, Raja Ramanna Centre for Advanced Technology, Indore, 2004-2005.
Associate Professor, Indian Association for the Cultivation of Science, Kolkata, since January 2006.

Research Interests
Experimental Condensed Matter Physics, with special interest in magnetic and electronic properties of rare-earth and 3d transition metal based intermetallic alloys as well as metal oxides. The present research topics involve,

Magneto-structural instability in Ferromagnetic shape memory alloys.
Phase separation and metastability across the first order phase transition.
Giant Magnetoresistance and Magneto-caloric effect in rare-earth intermetallics.
Low dimensional magnetic correlations in metal oxides.

A major thrust of our research is to study the first order magneto-structural behaviour. Ferromagnetic shape memory alloys are very important materials where the key to their functional behavior lies in the field and temperature driven martensitic-type magneto-structural instability. Our aim is to study intriguing magnetic, electronic and structural properties of these alloys near the instability, particularly originated from phase-coexistence, metastability and glassiness.

Different rare-earth based intermetallic alloys and compounds are also studied. Here our aim is to look for various functional properties including magneto-caloric effect and magneto-resistance.

We also look for fundamental magnetic interactions in transition metal oxides having low dimensional magnetic character. These include spin chain compounds, spin ladders, layered magnetic systems, and spin clusters. The main interest here to understand various exotic properties, such as dimerization, one dimensional spin correlations, spin fluctuations, spin frustration, and quantum criticality.

Ph. D. Students

1. Souvik Chatterjee (sspsc [at] iacs.res.in)

2. Amitava Bhattacharyya (sspab [at] iacs.res.in)

3. Sumanta Chattopadhyay(sspsc2 [at] iacs.res.in)

Selected List of Publications (Complete list of Publication in PDF)

1. Reentrant-spin-glass state in Ni₂Mn_1.36Sn_0.64 shape-memory alloy, S. Chatterjee, S. Giri, S. K. De and S. Majumdar, Phys. Rev. B 79, 092410 (2009).

2. Magnetic anomaly and magnetocaloric effect in Dy₂In, A Bhattacharyya, S. Chatterjee, S. Giri, and S. Majumdar, J. Magn. Magn. Mater. 321, 1828 (2009).

3. Giant magnetoresistance and large inverse magnetocaloric effect in Ni₂Mn_1.36Sn_0.64 alloy, S. Chatterjee, S. Giri, S. Majumdar, and S. K. De, J. Phys. D: Appl. Phys. 42, 065001 (2009).

4. Thermomagnetic irreversibility in Ni₂Mn_1.36Sn_0.64 shape memory alloy, S. Chatterjee, S. Giri, S. Majumdar, and S. K. De, Phys. Rev. B 77, 224440 (2008).

5. Metastability and magnetic memory effect in Ni₂Mn_1.4Sn_0.6, S. Chatterjee, S. Giri, S. Majumdar, and S. K. De, Phys. Rev. B 77, 012404 (2008).

6. Magnetic after-effect in Ni-Mn-Sb Heusler Alloy, S. Chatterjee, S. Giri, S. Majumdar, and S. K. De, J. Magn. Magn. Mater 320, 617 (2008).

7. Magneto-structural instability in Ni₂Mn_1.4Sb_0.6 alloy, S. Chatterjee, S. Giri, S. Majumdar, A. K. Deb, S. K. De, and V. Hardy, J. Phys.: Condens. Matter 19, 346213 (2007).

8. Transport properties of ferromagnetic Heusler alloy Co₂TiSn, S. Majumdar, M. K. Chattopadhyay, V.K. Sharma et al. Phys. Rev. B 72, 012417 (2005).

9. Neutron inelastic scattering investigation of the magnetic excitations in Cu₂Te₂O₅X₂ (X=Br, Cl), S. J. Crowe, S. Majumdar, M. R. Lees, D. McK. Paul, R. I. Bewley, S. J. Levett, C. Ritter, Phys. Rev. B 71, 224430 (2005).

10. Power law distribution of avalanche sizes in the field-driven transformation of a phase-separated oxide, V. Hardy, S. Majumdar, M. R. Lees, D. McK. Paul, C. Yaicle, and M. Hervieu, Phys. Rev. B 70, 104423 (2004).

11. Field-Induced Magnetization Steps in Intermetallic Compounds and Manganese Oxides: The Martensitic Scenario, V. Hardy, S. Majumdar, S. Crowe et al., Phys. Rev. B 69, 020407(R) (2004).

12. Magnetization and heat capacity investigations on the unconventional spin chain compound Sr₃CuPtO₆, S. Majumdar, V. Hardy, M. R. Lees, D. M^cK Paul, H. Rousseliere and D. Grebille, Phys. Rev B 69, 024405 (2004).

(Complete list of Publication in PDF)

Publication

Research Interest

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Updated on December 03, 2009