Large Magnetoresistance Effects in LnCoAsO with a Ferromagnetic-Antiferromagnetic Transition
Large Magnetoresistance Effects in LnCoAsO with a Ferromagnetic-Antiferromagnetic Transition
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LnCoAsO 中具有铁磁-反铁磁转变的大磁阻效应
DOI：
10.1103/physrevb.84.134411
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发表时间：
2011
影响因子：
3.7
通讯作者：
太田寛人
中科院分区：
文献类型：
--
作者：
竹口直輝;細貝知直;益田伸一;中新信彦;ジドコフアレクセイ;水田好雄;中原弘貴;幸原朋広;岩佐健太;金展;末田敬一;神門正城;ブラノフセルゲイ;吉田光宏;兒玉了祐;太田健二;太田寛人
在NdCoAsO和SmCoAsO层状化合物中观察到了大的磁电阻效应，在这些化合物中，Co的铁磁有序巡游电子被低于铁磁-反铁磁转变（FAFT）温度的局域4电子夹在中间。在SmCoAsO，大的MR效应也观察到居里温度，它被发现是起源于另一个反铁磁相的存在下，在低磁场区域的铁磁相。
A large magnetoresistance (MR) effect was observed in the layered compounds NdCoAsO and SmCoAsO, in which ferromagnetically ordered itinerant electrons of Co are sandwiched by localized 4electrons ofbelow ferromagnetic-antiferromagnetic transition (FAFT) temperatureas observed in other FAFT compounds. In SmCoAsO, the large MR effect is also observed up to the Curie temperature, and it is found to be originating in the presence of another antiferromagnetic phase in the low-magnetic-field region of the ferromagnetic phase.