Antiferromagnetic metallic state in the heavily doped region of perovskite manganites
Antiferromagnetic metallic state in the heavily doped region of perovskite manganites
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DOI：
10.1103/physrevb.58.5544
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发表时间：
1998-09
影响因子：
3.7
通讯作者：
Y. Moritomo;T. Akimoto;A. Nakamura;K. Ohoyama;M. Ohashi
中科院分区：
文献类型：
--
作者：
Y. Moritomo;T. Akimoto;A. Nakamura;K. Ohoyama;M. Ohashi
通过改变标称空穴浓度 x 和单电子带宽 W，对反铁磁金属 (AFM) 态相界附近的掺杂锰矿的电子和磁性进行了全面的研究。在具有最大 W 的 La 1− x Sr x MnO 3 中，低 x 区域中的铁磁金属基态被超过 x= 0.54 的 AFM 态取代。另一方面，当 W 减少时，Nd 1− x Sr x MnO x 的电荷有序绝缘 (COI) 态出现在 x∼ 0.5 处。随着 x (>~ 0. 5 4) 或 W 的进一步增加，COI 基态被 AFM 态淹没。AFM 态与替代基态的这些竞争表明 AFM 态是掺杂锰氧化物的基本基态。
Comprehensive study on electronic and magnetic properties has been performed for doped manganite near the phase boundary of the antiferromagnetic metallic (AFM) state, with changing the nominal hole concentration x and the one-electron bandwidth W. In La 1− x Sr x MnO 3 with maximal W, the ferromagnetic metallic ground state in the low-x region is replaced by the AFM state beyond x= 0.54. On the other hand, the charge-ordered insulating (COI) state appears at x∼ 0.5 for Nd 1− x Sr x MnO x with reduced W. The COI ground state is overwhelmed by the AFM state with further increasing x (>~ 0. 5 4) or W. These competitions of the AFM state with the alternative ground states suggest that the AFM state is a fundamental ground state for doped manganites.