Publications

Journal Papers

[2008]


• C.M.Srivastava, N.B.Srivastava, Saket Asthana,L.N.Singh and D.Bahadur,   "Correlated polarons and Colossal Magnetoresistance in La_2/3Ca_1/3MnO₃", (communicated)
  
  
• Saket Asthana,A.K. Nigam, S.K. Malik and D. Bahadur, "Lattice effect on the magnetic and magneto-transport properties of (La_1/3Sm_2/3)_0.67Ba_0.33-xSr_xMnO₃ (x = 0.0, 0.1, 0.2 and 0.33)compounds",  J. Alloys and Compds  450 (2008) 136
  
  [2007]
  
  
• Saket Asthana,Joonghoe Dho and D. Bahadur ,  "Effects of A-site ionic size variation on the magnetic and transport properties of (Pr_xSm_1-x)_2/3Sr_1/3MnO₃ (0 £ x £1)",  phys. stat. sol.(b) 244 (2007) 4542
  
  
• Saket Asthana, Joonghoe Dho and D. Bahadur ,  "Weak charge ordering behavior in phase separated (Ln_1/3Sm_2/3)_2/3Ca_1/3MnO₃ (Ln=Pr and La) manganites ",  Solid State Commun. 143 (2007) 522
  
  
• Saket Asthana and D. Bahadur,  "Structural,Magnetic and magneto transport studies on the (La_2/3Sm_1/3)_0.67Ba_0.33-xSr_xMnO₃ (x = 0, 0.1, 0.2 and 0.33) manganites",  J. Phys.D: Appl. Phys.  40 (2007) 1839
  
  
• Saket Asthana and D. Bahadur,  Corrigendum on "Structural,Magnetic and magneto transport studies on the (La_2/3Sm_1/3)_0.67Ba_0.33-xSr_xMnO₃ (x = 0, 0.1, 0.2 and 0.33) manganites",  J. Phys.D: Appl. Phys.  40 (2007) 2614
  
  
• D. Bahadur,Saket Asthana, C. Carbonera C. Desplanches and J-F Letard, "Magnetic and photomagnetism studies in Nd_0.7Sr_0.3CoO₃",  Solid State Commun. 142 (2007) 132
  
  
• Saket Asthana,D. Bahadur and C. M. Srivastava, , Erratum to "Small polarons as charge carriers in the transport of (La_1/3Sm_2/3)_0.67Ba_0.33-xSr_xMnO₃ ( x = 0, 0.1, 0.2 and 0.33)",  Physica B:Condensed Matter  396 (2007) 232
  
  [2006]
  
  
• Saket Asthana,A.K. Nigam and D. Bahadur, "Magnetic and magneto-transport properties of (La_xSm_1-x)_2/3Sr_1/3MnO₃ (x = 1/3, 1/2 and 2/3) manganites"),  phys. stat. sol. (b) 243 (2006) 1922
  
  
• Saket Asthana,D. Bahadur and C. M. Srivastava, "Small polarons as charge carriers in the transport of (La_1/3Sm_2/3)_0.67Ba_0.33-xSr_xMnO₃ ( x = 0, 0.1, 0.2 and 0.33)",  Physica B: Condensed Matter  371 (2006) 241
  
  [2005]
  
  
• Saket Asthana, D. Bahadur, A.K. Nigam and S.K. Malik, "Electronic phase separation in (La_1/3Sm_2/3)_2/3A_1/3MnO₃ (A = Ca, Sr and Ba)compounds" J. Appl. Phys.  97 (2005) 10H711
  
  
• Saket Asthana,A.K. Nigam and D. Bahadur, "Effect of Cobalt substitution on magneto-transport properties of Nd_0.7Sr_0.3Mn_{1- x}Co_xO₃ (0.0 £ x £ 1.0)  " J. Appl. Phys.  97 (2005) 10C101
  
  
• Jyotsnendu Giri, T. Sriharsha, Saket Asthana, T. K. Gundu Rao, A. K. Nigam, D.Bahadur, "Synthesis of capped nano sized Mn_1-xZn_xFe₂O₄, (0£x£0.8) by microwave refluxing for bio-medical applications",  J.Magn.Magn. Mater. 293 (2005) 55
  
  
• Saket Asthana,A.K. Nigam and D. Bahadur, "Effect of A-site ionic radii on the magneto-transport properties in (La_xSm_1-x)_2/3Sr_1/3MnO₃ (x = 1/3, 1/2 and 2/3) manganites" Electromagnetic Materials, Proceedings of the Symposium R, International Conference on Materials for Advanced Technologies, 3-8 July 2005, Singapore.   ICMAT 2005 (2005) 242
  
  [2004]
  
  
• Saket Asthana, D. Bahadur, A.K. Nigam and S.K. Malik, "Magneto-transport studies on (Pr_1/3Sm_2/3)_2/3A_1/3MnO₃ (A = Ca, Sr and Ba) compounds", J. Phys: Conden. Matter. 16 (2004) 5297
  
  
• C.M. Srivastava, R.K. Dwivedi, Saket Asthana, A. K. Nigam and D. Bahadur, "Effect of Cr substitution on transport and magnetic ordering in Nd_0.50Sr_0.50Mn_{1- x}Cr_xO₃(0.001£ x £ 0.20)", J. Magn. Magn. Mater. 284 (2004) 239

Conference Presentations

• Phan Van Cuong, Soo-Ho Kim, Hong-Quang Nguyen,Saket Asthana, Joonghoe Dho, and Do-Hyung Kim, "Grain-Boundary Effects on the Electrical Resistivity and the Ferromagnetic Transition Temperature in Sonochemically-Synthesized La_0.7Sr_0.3MnO₃ Nanoparticles" GJ-NST 2007 International Conference on Nano Science and Nano Technology, 8-9 Nov. 2007 Kimdaejung convention center, Gwangju, Korea.
  
  
• Joonghoe Dho, Saket Asthana,C.M. Lee, S.C. Choi, "Oxygen pressure dependent physical properties of multiferroic BiFeO₃ films prepared by pulsed laser deposition."  Materials Today Asia, 3-5September 2007, Beijing, China.
  
  
• Saket Asthana, Joonghoe Dho and D. Bahadur, "Effects of A-site ionic size variation on the magnetic and transport properties of (Pr_xSm_1-x)_2/3Sr_1/3MnO₃ (0 £x £1)" International Symposium on Advance Magnetic Materials and Applications (ISAMMA), 28 May-1 June, 2007, Jeju, South Korea.
  
  
• Saket Asthana, D. Bahadur, C.Carbonera and J-F Letard, "Magneto-transport, magnetic and photo-magnetic studies in Nd_0.7Sr_0.3CoO₃"   Indo-Japan Joint Seminar on Novel Giant-Magnetoresistive Materials and their ElectronicStructures, 30 Jan-1 Feb 2006, IISc Banglore, India.
  
  
• Saket Asthana,A.K. Nigam and D. Bahadur, "Effect of A-site ionic radii on the magneto-transport properties in (La_xSm_1-x)_2/3Sr_1/3MnO₃ (x = 1/3, 1/2 and 2/3) manganites" ICMAT05 conference, 3-8 July 2005, Singapore.
  
  
• Saket Asthana, D. Bahadur, A.K. Nigam and S.K. Malik, "Electronic phase separation in
  (La_1/3Sm_2/3)_2/3A_1/3MnO₃ (A = Ca, Sr and Ba)compounds" 49th MMM conference, 7-11th Nov 2004, Jacksonville, Florida, US.
  
  
• Saket Asthana,A.K. Nigam and D. Bahadur, "Effect of Cobalt substitution on magneto-transport properties of Nd_0.7Sr_0.3Mn_{1- x}Co_xO₃ (0.0 £ x £ 1.0) " 49th MMM conference, 7-11th Nov 2004, Jacksonville, Florida, US.
  
  
• J. Giri, T. Sriharsha,Saket Asthana,T. K. Gundu Rao, A. K. Nigam, D.Bahadur, "Synthesis of capped nano sized Mn_1-xZn_xFe₂O₄, (0£x£0.8) by microwave refluxing for bio-medical applications"   5th International Conference on the Scientific and Clinical Applications of Magnetic Carriers, 20-22nd May, 2004,Lyon, France.
  
  
• Bibhuti B. Nayak, Saket Asthana,A. K. Nigam, S. Vitta and D. Bahadur, "Electrical and Magnetic properties of La-Ca-Mn-O/SiO2 nanocomposite through glass ceramic route" Symposium on Nanotechnology @ IIT Bombay, (IRCC) 13th Sept 2003, Mumbai, India
  
  
• Saket Asthana,R. Sarraf and R. K. Dwivedi, "Magneto-Transport Behavior in the system (Nd_1-xLa_x)_2/3Pb_1/3MnO₃ (x = 3/9, 4/9, 5/9 and 6/9)" Recent Advances in Inorganic Materials (RAIM 2002), 11-13th Dec 2002,IIT Bombay, India

Abstracted Only

• Saket Asthana and D. Bahadur,  "Effect of Cobalt substitution on magnetic and transport properties of Nd_0.5Sr_0.5Mn_1-xCo_xO₃ (x = 0.1, 0.3 and 0.5)",  52nd MMM conference, 5-9th Nov 2007, Tampa, Florida, US.
  
  
• D. Bahadur,Saket Asthana, C. Carbonera and J. Letard,   "Photomagnetism Studies in Nd_0.7Sr_0.3CoO₃",  Intermag 2006 Conference,May 8-12, 2006, San Diego, California
  
  
• Saket Asthana, D. Bahadur, A.K. Nigam and S.K. Malik, "Investigations on magnetic, transport and magnetoresistance properties of (Pr_1/3Sm_2/3)_2/3A_1/3MnO₃ (A = Ca, Sr and Ba) compounds",  Ninth International Conference on Ferrites (ICF-9),Aug 23-27,2004, San Fransisco