Magnetism and Transport Properties of Sr2Ru1−xCoxO4 with x ≤ 0.25

详细信息    查看全文

• 作者：Xiaomin Gu ; Guotai Zhou ; Kaige Gao ; Jin Peng ; Wei Wang ; Fengming Zhang and Xiaoshan Wu
• 刊名：Journal of the American Ceramic Society
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：99
• 期：6
• 页码：2024-2028
• 全文大小：1040K
• ISSN：1551-2916

文摘

Single-phase polycrystalline Sr₂Ru_1−xCo_xO₄ are successfully synthesized by conventional solid-state method with doping content up to x = 0.25. Ferrimagnetism develops among the incommensurate antiferromagnetic fluctuations in the doped compounds. An abnormal coercivity–temperature relation at a high doping level (x > 0.10), in which the samples have smaller coercive field at low temperature than that at high temperature, i.e., H_C(5 K) < H_C(50 K), is observed. The Curie–Weiss temperature shows the negative value for all samples, and the susceptibility increases with Co doping content x. The exchange bias effect is detected in magnetic hysteresis loops. A three-dimensional transport property has been derived based on the variable rang hopping theory, indicating a thermally assisted hopping of electrons between the localized states.