Skip to main content
placeholder image

Magnetotransport and magnetic properties of weak ferromagnetic semiconductors: Ca doped LaCrO3

Journal Article


Download full-text (Open Access)

Abstract


  • We report the magnetic and magnetotransport properties of Ca doped La1-xCaxCrO3 (x=0, 0.1, 0.2, and 0.3). Both the magnetic and transport properties are very sensitive to Ca substitution. The Neel temperature T-N decreases substantially with increasing calcium doping concentration from 290 to 160 K. A weak ferromagnetic state with large coercive fields of up to 3 T is present for the Ca doped LaCrO3. The temperature dependence of the resistivity shows that all the Ca doped compounds are semiconducting and their resistivities decrease with increasing Ca for low doping levels. The resistivity curves show thermally activated behavior and a variable range hopping behavior at high temperatures. The magnetotransport measurements show a negative magnetoresistance. Furthermore, an anomalous peak was observed in the field dependence of magnetoresistance for the LCCO materials.

Publication Date


  • 2008

Citation


  • Alvarez, G. A., Wang, X. L., Peleckis, G., Dou, S. X., Zhu, J. G. & Lin, Z. W. (2008). Magnetotransport and magnetic properties of weak ferromagnetic semiconductors: Ca doped LaCrO3. Journal of Applied Physics, 103 (7), 07B916-1-07B916-3.

Scopus Eid


  • 2-s2.0-42149152785

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7165&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4234

Has Global Citation Frequency


Start Page


  • 07B916-1

End Page


  • 07B916-3

Volume


  • 103

Issue


  • 7

Place Of Publication


  • United States

Abstract


  • We report the magnetic and magnetotransport properties of Ca doped La1-xCaxCrO3 (x=0, 0.1, 0.2, and 0.3). Both the magnetic and transport properties are very sensitive to Ca substitution. The Neel temperature T-N decreases substantially with increasing calcium doping concentration from 290 to 160 K. A weak ferromagnetic state with large coercive fields of up to 3 T is present for the Ca doped LaCrO3. The temperature dependence of the resistivity shows that all the Ca doped compounds are semiconducting and their resistivities decrease with increasing Ca for low doping levels. The resistivity curves show thermally activated behavior and a variable range hopping behavior at high temperatures. The magnetotransport measurements show a negative magnetoresistance. Furthermore, an anomalous peak was observed in the field dependence of magnetoresistance for the LCCO materials.

Publication Date


  • 2008

Citation


  • Alvarez, G. A., Wang, X. L., Peleckis, G., Dou, S. X., Zhu, J. G. & Lin, Z. W. (2008). Magnetotransport and magnetic properties of weak ferromagnetic semiconductors: Ca doped LaCrO3. Journal of Applied Physics, 103 (7), 07B916-1-07B916-3.

Scopus Eid


  • 2-s2.0-42149152785

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7165&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4234

Has Global Citation Frequency


Start Page


  • 07B916-1

End Page


  • 07B916-3

Volume


  • 103

Issue


  • 7

Place Of Publication


  • United States