Effects of Hole-Doping and Disorder on the Magnetic States of Delafossite CuCrO 2 Having a SPIN-3/2 Antiferromagnetic Triangular Sublattice
Effects of Hole-Doping and Disorder on the Magnetic States of Delafossite CuCrO 2 Having a SPIN-3/2 Antiferromagnetic Triangular Sublattice
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DOI：
10.1142/s0217979213300028
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发表时间：
2013-01
影响因子：
1.7
通讯作者：
T. Okuda;R. Kajimoto;M. Okawa;T. Saitoh
中科院分区：
文献类型：
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作者：
T. Okuda;R. Kajimoto;M. Okawa;T. Saitoh
在这篇综述中，我们将讨论巡回孔和无序产生的替代对磁状态的多晶铜铁矿氧化物CuCrO 2具有自旋3/2反铁磁三角形亚晶格的影响。首先，我们将展示通过用Mg ~（2+）取代磁性Cr ~（3+）的空穴掺杂对CuCrO_2的物理性质的影响，并将讨论由于巡游空穴与局域自旋之间的耦合而引起的120° Neel态的非平凡提升的起源。接下来，我们将展示由等价取代引入的无序效应，例如用Ag+取代Cu+，用Al 3+取代磁性Cr 3+，并将讨论出现不寻常的磁状态的可能性，例如自旋液体或自旋态。
In this review, we will discuss the effects of itinerant hole and disorder produced by substitutions on the magnetic states of polycrystalline delafossite oxide CuCrO2 having a spin-3/2 antiferromagnetic triangular sublattice. First, we will show the effects of hole-doping by the substitution of nonmagnetic Mg2+ for magnetic Cr3+ on the physical properties of CuCrO2, and will discuss the origin of nontrivial promotion of the 120° Neel state due to the coupling between the itinerant hole and localized spin. Next, we will show the effects of disorder introduced by the isovalent substitutions such as the nonmagnetic Ag+ substitution for nonmagnetic Cu+ and the nonmagnetic Al3+ one for magnetic Cr3+, and will discuss the possibility of appearance of unusual magnetic states such as spin liquid or spin nematic states.