Magnetic and transport properties in Gd$_{1-x}$Sr$_x$CoO$_{3}$ ($x$= 0.10-0.70)

X. G. Luo; H. Li; X. H. Chen; Y. M. Xiong; G. Y. Wang; C. H. Wang; W. J. Miao; X. Li

doi:10.1021/cm0521471

paper

Magnetic and transport properties in Gd $_{1 - x}$ Sr $_{x}$ CoO $_{3}$ ( $x$ = 0.10-0.70)

arXiv:cond-mat/0501562 · doi:10.1021/cm0521471

Abstract

Magnetic and transport properties of polycrystalline Gd $_{1 - x}$ Sr $_{x}$ CoO $_{3}$ ( $x$ = 0.10-0.70) are investigated systemically. Cluster-glass magnetism for $x \leq$ 0.45 and long-range ferromagnetic order in higher doping level are observed. Transport measurements indicate insulator-like behaviors for the samples with $x \leq$ 0.30, and an insulator-metal (IM) transition around $x$ = 0.35, and metallic behaviors for higher $x$ samples. In contrast to La $_{1 - x}$ Sr $_{x}$ COO $_{3}$ , the striking feature is that the system reenters insulator-like state for $x \geq$ 0.60, and the long-range ferromagnetic order and IM transition take place in samples with higher Sr content. It could be attributed to the enhancement of low-spin state stability for the trivalent Co ions due to the small radius of Gd $^{3 +}$ ion.

8 pages, 9 figures

Magnetic and transport properties in Gd1−x​Srx​CoO3​ (x= 0.10-0.70)

Abstract

Magnetic and transport properties in Gd $_{1 - x}$ Sr $_{x}$ CoO $_{3}$ ( $x$ = 0.10-0.70)