Please use this identifier to cite or link to this item:
|Title:||Magnetic and electric transport properties of Nd0.75Sr 1.25Co1-xMnxO4|
|Citation:||Huang, S.L., Guan, L.X., Yi, J.B., Zhao, B.C., Wu, Y., Fan, Z.C., Sum, T.C., Ding, J., Wang, L. (2008). Magnetic and electric transport properties of Nd0.75Sr 1.25Co1-xMnxO4. Journal of Applied Physics 104 (12) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3046673|
|Abstract:||We present the results of a systematic investigation of crystal structure, dc magnetization, ac susceptibility, resistivity, and magnetoresistance (MR) of Nd0.75Sr1.25Co1-xMnxO4 (0≤x≤0.3) polycrystals. All synthesized specimens are indexed in the same tetragonal space group I4/mmm with random occupation of Co and Mn ions at the identical site. The refinement result confirms the tetragonal distortion of the CoO6 octahedron with elongation along the c axis. The substitution of the Mn ions at Co site brings about the suppression of ferromagnetism as well as the enhancement of antiferromagnetism. The coexistence of ferromagnetic double exchange interactions and antiferromagnetic superexchange interactions and the suppression of ferromagnetism with increasing Mn doping are substantiated by the isothermal magnetization hysteresis loops. The result suggests that the substitution creates more antiferromagnetic bonds with superexchange interactions at the expense of the existing Co-O-Co bonds with ferromagnetic double exchange interactions. At low temperature, a crossover from ferromagnetic cluster-glass phase to spin-glass phase is shown in the dc and ac magnetic measurements. For all the specimens, the resistivity ρ (T) follows semiconducting behavior (dρ /dT|
|Source Title:||Journal of Applied Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jan 11, 2019
WEB OF SCIENCETM
checked on Jan 2, 2019
checked on Jan 12, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.