A. A. Bush, S. K. Gotovko, V. Yu. Ivanov, V. I. Kozlov, E. G. Nikolaev, L. E. Svistov
{"title":"Magnetic properties of LiCu$_3$O$_3$ -- quasi-two-dimensional antiferromagnet on depleted square lattice","authors":"A. A. Bush, S. K. Gotovko, V. Yu. Ivanov, V. I. Kozlov, E. G. Nikolaev, L. E. Svistov","doi":"arxiv-2409.04213","DOIUrl":null,"url":null,"abstract":"LiCu$_3$O$_3$ is a novel 2D S=1/2 antiferromagnet with randomly depleted\nsquare lattice. The crystal structure contains two types of square planes with\ndifferent Cu$^{2+}\\rightarrow$ Li$^{+}$ substitution rates (20% and 40%).\n$^7$Li NMR and magnetization measurements performed on single crystals of\nLiCu$_3$O$_3$ revealed the occurrence of magnetic order at $T_{c1}=123$ K and\nthe change of the magnetic state at $T_{c2}\\approx30$ K. The high temperature\ntransition can be attributed to establishment of magnetic order in planes with\nhigher concentration of magnetic ions and the low temperature transition -- to\nthe magnetic ordering in planes with lower concentration of magnetic ions.\nBroad continuous NMR spectra below $T_{c1}$ reflect a continuous distribution\nof values or directions of magnetic moments in LiCu$_3$O$_3$ typical for\nspiral, spin-modulated magnetic structures or structures with frozen disorder.\nMagnetization measurements revealed a spin-flop transition which indicates weak\nuniaxial anisotropy of the spin structure. Relatively small value of magnetic\nsusceptibility at all orientations of applied magnetic field shows that\nmagnetic structure is rigid, since the estimated value of saturation field\nderived from differential susceptibility measured at $\\mu_0 H=5$ T is\n$\\mu_0H_{sat} \\approx$200 T.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"65 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Strongly Correlated Electrons","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.04213","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
LiCu$_3$O$_3$ is a novel 2D S=1/2 antiferromagnet with randomly depleted
square lattice. The crystal structure contains two types of square planes with
different Cu$^{2+}\rightarrow$ Li$^{+}$ substitution rates (20% and 40%).
$^7$Li NMR and magnetization measurements performed on single crystals of
LiCu$_3$O$_3$ revealed the occurrence of magnetic order at $T_{c1}=123$ K and
the change of the magnetic state at $T_{c2}\approx30$ K. The high temperature
transition can be attributed to establishment of magnetic order in planes with
higher concentration of magnetic ions and the low temperature transition -- to
the magnetic ordering in planes with lower concentration of magnetic ions.
Broad continuous NMR spectra below $T_{c1}$ reflect a continuous distribution
of values or directions of magnetic moments in LiCu$_3$O$_3$ typical for
spiral, spin-modulated magnetic structures or structures with frozen disorder.
Magnetization measurements revealed a spin-flop transition which indicates weak
uniaxial anisotropy of the spin structure. Relatively small value of magnetic
susceptibility at all orientations of applied magnetic field shows that
magnetic structure is rigid, since the estimated value of saturation field
derived from differential susceptibility measured at $\mu_0 H=5$ T is
$\mu_0H_{sat} \approx$200 T.