中国物理B ›› 2014, Vol. 23 ›› Issue (4): 48101-048101.doi: 10.1088/1674-1056/23/4/048101

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Magnetizations and magneto-transport properties of Ni-doped PrFeO3 thin films

Feroz A. Mira, S. K. Sharmab, Ravi Kumarc   

  1. a University Science Instrumentation Center, University of Kashmir, J & K, Srinagar-190006, India;
    b Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas (UNICAMP), Campinas, 13.083-970 Sao Paulo, Brazil;
    c CMSE, National Institute of Technology, Hamirpur (H.P)-177005, India
  • 收稿日期:2013-05-11 修回日期:2013-08-10 出版日期:2014-04-15 发布日期:2014-04-15

Magnetizations and magneto-transport properties of Ni-doped PrFeO3 thin films

Feroz A. Mira, S. K. Sharmab, Ravi Kumarc   

  1. a University Science Instrumentation Center, University of Kashmir, J & K, Srinagar-190006, India;
    b Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas (UNICAMP), Campinas, 13.083-970 Sao Paulo, Brazil;
    c CMSE, National Institute of Technology, Hamirpur (H.P)-177005, India
  • Received:2013-05-11 Revised:2013-08-10 Online:2014-04-15 Published:2014-04-15
  • Contact: Feroz A. Mir E-mail:famirnit@gmail.com
  • About author:81.15.Fg; 73.50.Jt; 75.50.Bb; 81.15.Fg

摘要: The present study reports the magnetizations and magneto-transport properties of PrFe1-xNixO3 thin films grown by pulsed laser ablation technique on LaAlO3 substrates. From DC M/H plots of these films, weak ferromagnetism or ferrimagnetism behaviors are observed. With Ni substitution, reduction in saturation magnetization is also seen. With Ni doping, variations in saturation field (Hs), coercive field (Hc), Weiss temperature (θ), and effective magnetic moment (peff) are seen. A small change of magnetoresitance with application of higher field is observed. Various essential parameters like density of state (Nf) at Fermi level, Mott's characteristic temperature (T0), and activation energy (Ea) in the presence of and in the absence of magnetic field are calculated. The present observed magnetic properties are related to the change of Fe-O bond length (causing an overlap between the oxygen p orbital and iron d orbital) and the deviation of the Fe-O-Fe angle from 180°. Reduction of magnetic domain after Ni doping is also explored to explain the present observed magnetic behavior of the system. The influence of doping on various transport properties in these thin films indicates a distortion in the lattice structure and single particle band width, owing to stress-induced reduction in unit cell volume.

关键词: thin films, magnetization, ferromagnetism, ferrimagnetism, magneto-transport and distortion

Abstract: The present study reports the magnetizations and magneto-transport properties of PrFe1-xNixO3 thin films grown by pulsed laser ablation technique on LaAlO3 substrates. From DC M/H plots of these films, weak ferromagnetism or ferrimagnetism behaviors are observed. With Ni substitution, reduction in saturation magnetization is also seen. With Ni doping, variations in saturation field (Hs), coercive field (Hc), Weiss temperature (θ), and effective magnetic moment (peff) are seen. A small change of magnetoresitance with application of higher field is observed. Various essential parameters like density of state (Nf) at Fermi level, Mott's characteristic temperature (T0), and activation energy (Ea) in the presence of and in the absence of magnetic field are calculated. The present observed magnetic properties are related to the change of Fe-O bond length (causing an overlap between the oxygen p orbital and iron d orbital) and the deviation of the Fe-O-Fe angle from 180°. Reduction of magnetic domain after Ni doping is also explored to explain the present observed magnetic behavior of the system. The influence of doping on various transport properties in these thin films indicates a distortion in the lattice structure and single particle band width, owing to stress-induced reduction in unit cell volume.

Key words: thin films, magnetization, ferromagnetism, ferrimagnetism, magneto-transport and distortion

中图分类号:  (Pulsed laser ablation deposition)

  • 81.15.Fg
73.50.Jt (Galvanomagnetic and other magnetotransport effects) 75.50.Bb (Fe and its alloys) 81.15.Fg (Pulsed laser ablation deposition)