Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1596874 | Solid State Communications | 2006 | 6 Pages |
Abstract
The magnetic property of double doped manganite Nd0.5(1+x)Ca0.5(1âx)Mn(1âx)CrxO3 with a fixed ratio of Mn3+:Mn4+=1:1 has been investigated. For the undoped sample, it undergoes one transition from charge disordering to charge ordering (CO) associated with paramagnetic (PM)-antiferromagnetic (AFM) phase transition at T<250Â K. The long range AFM ordering seems to form at 35Â K, rather than previously reported 150Â K. At low temperature, an asymmetrical M-H hysteresis loop occurs due to weak AFM coupling. For the doped samples, the substitution of Cr3+ for Mn3+ ions causes the increase of magnetization and the rise of Tc. As the Cr3+ concentration increases, the CO domain gradually becomes smaller and the CO melting process emerges. At low temperature, the FM superexchange interaction between Mn3+ and Cr3+ ions causes a magnetic upturn, namely, the second FM phase transition.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Jiyu Fan, Jing Xie, Yue Ying, Li Pi, Yuheng Zhang,