EFFECTS OF HOLE-DOPING AND DISORDER ON THE MAGNETIC STATES OF DELAFOSSITE CuCrO2 HAVING A SPIN-3/2 ANTIFERROMAGNETIC TRIANGULAR SUBLATTICE

被引：11
作者：
Okuda, Tetsuji [1 ]
Kajimoto, Ryoichi [2 ]
Okawa, Mario [3 ]
Saitoh, Tomohiko [3 ]
机构：
[1] Kagoshima Univ, Grad Sch Sci & Engn, Kagoshima 8900065, Japan
[2] Comprehens Res Org Sci & Soc, Res Ctr Neutron Sci & Technol, Ibaraki 3191106, Japan
[3] Tokyo Univ Sci, Dept Appl Phys, Shinjuku Ku, Tokyo 1628601, Japan
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2013年 / 27卷 / 05期
关键词：
Antiferromagnetic triangular lattice; geometrical frustration; delafossite; hole-doping; order by disorder; spin liquid; spin nematic; NOBLE-METAL OXIDES; NEUTRON POWDER DIFFRACTION; P-TYPE CONDUCTIVITY; X-RAY-DIFFRACTION; ELECTRONIC-STRUCTURE; HEISENBERG-ANTIFERROMAGNET; RESONANT-PHOTOEMISSION; TRANSPORT-PROPERTIES; THIN-FILMS; SPECTRA;
D O I：
10.1142/S0217979213300028
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 degrees 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.
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页数：43
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