Griffiths singularities and magnetoresistive manganites

Details Griffiths singularities and magnetoresistive manganites Griffiths singularities and magnetoresistive manganites

2003-01-14

arxiv.org/abs/cond-mat/0301243v1

Physics

Condensed Matter

Strongly Correlated Electrons

20 pages, 10 figures

Scientific paper

10.1103/PhysRevB.68.014411

The large, so-called colossal, magnetoresistivity of doped manganese oxides based on LaMnO3 has attracted considerable attention, but only one unusual feature of the ferromagnetic transition in these compounds. We examine in this paper the progression of magnetic and thermodynamic behavior as the transition temperature is made to vary from 360 K to 218 K by changing the divalent dopant. Single crystals of La_{0.7}Sr_{0.3}MnO3, as is well known, show modest magnetoresistivity and conventional critical behavior. La$_{0.7}$Pb$_{0.3}$ Mn$O_3$, and to an even greater extent, La$_{0.7}$Ca$_{0.3}$MnO$_3$, have unusual magnetic properties extending more than 100 K above the transition. We treat the properties of the latter samples in the context of a Griffiths phase in which the transition temperature is depressed from its maximum value T_{G} by random bond-angle bending.

Affiliated with

Also associated with

No associations

Rating

Griffiths singularities and magnetoresistive manganites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Griffiths singularities and magnetoresistive manganites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Griffiths singularities and magnetoresistive manganites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-497473