The Effect of Rich Cr Doping of Perovskite Manganites on the Mn-site. A neutron diffraction study

Eleni Gamari-Seale 

Abstract

Abstract. Neutron powder diffraction study of the rich doped manganite with Cr on the Mn-site, Nd0.6Ca0.4(Mn1-xCrx)O3 in powder form, revealed the magnetic unit cell retains the CE type structure as the parent compound Nd0.6Ca0.4MnO3 but the charge ordered (CO) and orbital ordered (OO) observed in the parent compound is destroyed. The Mn and Cr form antiferromagnetic zig-zag chains along the a-axis. These planes are stacked along the b axis but with opposite spins. At low temperature there is a sign of canted structure. The Nd sublattice orders at low temperature in a ferromagnetic way. The Nd magnetic moment obtains the small value of 0.5μB/loν at low temperatures.

 

Presentation: invited oral at E-MRS Fall Meeting 2003, Symposium D, by Eleni Gamari-Seale
See On-line Journal of E-MRS Fall Meeting 2003

Submitted: 2003-07-15 12:27
Revised:   2009-06-08 12:55