Heavy-mass fermi liquid near a ferromagnetic instability in layered ruthenates.
Heavy-mass fermi liquid near a ferromagnetic instability in layered ruthenates.
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DOI：
10.1103/physrevlett.90.137202
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发表时间：
2003-04
影响因子：
8.6
通讯作者：
S. Nakatsuji;Donavan Hall;L. Balicas;Z. Fisk;Kengo Sugahara;Masaki Yoshioka;Y. Maeno
中科院分区：
文献类型：
--
作者：
S. Nakatsuji;Donavan Hall;L. Balicas;Z. Fisk;Kengo Sugahara;Masaki Yoshioka;Y. Maeno
低温下的磁性，热，和运输测量在Ca 2-xSrxRuO 4澄清集群玻璃相的外观后，从自旋三重态超导体Sr 2 RuO 4的近铁磁性重质量费米液体的演变。当Mott转变跨越2阶结构转变时，磁化强度和比热都显著降低，而输运散射率发散。观察到了向高自旋极化态的变磁跃迁，局域矩S=1/2。我们认为，轨道重排与钙取代的巡回铁磁性的反铁磁性的本地化时刻。
Low temperature magnetic, thermal, and transport measurements in Ca2-xSrxRuO4 clarify the appearance of a cluster glass phase, after the evolution of a nearly ferromagnetic heavy-mass Fermi liquid from the spin-triplet superconductor Sr2RuO4. As the Mott transition is approached across a 2nd-order structural transition, both the magnetization and specific heat decrease considerably while the transport scattering rate diverges. A metamagnetic transition to a highly spin polarized state, with a local moment S=1/2, is observed. We argue that an orbital rearrangement with Ca substitution changes itinerant ferromagnetism to antiferromagnetism of localized moments.