scholarly journals Magnetic ordering and spin dynamics in potassium jarosite: A Heisenberg kagomé lattice antiferromagnet

2003 ◽  
Vol 67 (22) ◽  
Author(s):  
Masahide Nishiyama ◽  
Satoru Maegawa ◽  
Toshiya Inami ◽  
Yoshio Oka
Keyword(s):  
Spin Dynamics ◽  
Magnetic Ordering ◽  
Kagome Lattice ◽  
Kagomé Lattice

scholarly journals Kagome Spinwaves: Spin Dynamics and Dirac Nodes in a Kagome Lattice (Ann. Phys. 2/2020)

2020 ◽  
Vol 532 (2) ◽  
pp. 2070015 ◽  
Author(s):  
Daniel Boyko ◽  
Avadh Saxena ◽  
Jason T. Haraldsen
Keyword(s):  
Spin Dynamics ◽  
Kagome Lattice ◽  
Kagomé Lattice

scholarly journals Semiclassical spin dynamics of the antiferromagnetic Heisenberg model on the kagome lattice

2014 ◽  
Vol 90 (6) ◽  
Author(s):  
Mathieu Taillefumier ◽  
Julien Robert ◽  
Christopher L. Henley ◽  
Roderich Moessner ◽  
Benjamin Canals
Keyword(s):  
Heisenberg Model ◽  
Spin Dynamics ◽  
Kagome Lattice ◽  
Kagomé Lattice ◽  
Antiferromagnetic Heisenberg Model

Magnetic ordering and excitation in triangulated anti-ferromagnet Cu9Cl2(cpa)6·nH2O

2001 ◽  
Vol 79 (11-12) ◽  
pp. 1409-1413 ◽  
Author(s):  
M Mekata ◽  
M Abdulla ◽  
M Kubota ◽  
Y Oohara
Keyword(s):  
Inelastic Neutron Scattering ◽  
Magnetic Ordering ◽  
Inelastic Neutron ◽  
Acid Form ◽  
Full Width ◽  
Curie Constant ◽  
Kagome Lattice ◽  
Kagomé Lattice ◽  
Scattering Measurements ◽  
Powder Samples

The Cu2+ ions in Cu9Cl2(cpa)6 · nH2O (cpa is the anion of 2-carboxy pentonic acid) form a slightly deformed Kagome lattice with a smaller triangle plaquette in each triangle of a Kagome lattice showing strong frustration. The anomalous features of magnetism are the reduction of the Curie constant below 50 K, fractional saturation even in a field of 38 T, and nonlinear magnetic susceptibility below 5 K. We performed inelastic neutron scattering measurements on powder samples and observed dispersionless scattering around 6.5 meV with a full width of about 8 meV indicating a single-site excitation with E/kB [Formula: see text] 70 K. The scattering is less conspicuous above 50 K. These results are interpreted in terms of the plaquette-ordering model that assumes a 120° arrangement of three moments on each triangular plaquette and a random freezing of the remaining paramagnetic moments below 5 K. PACS No.: 75.10Hk

scholarly journals Magnetic ordering and fluctuation in Kagome lattice anti-ferromagnets, Fe and Cr jarosites

2001 ◽  
Vol 79 (11-12) ◽  
pp. 1511-1516 ◽  
Author(s):  
M Nishiyama ◽  
T Morimoto ◽  
S Maegawa ◽  
T Inami ◽  
Y Oka
Keyword(s):  
Magnetic Transition ◽  
Magnetic Ordering ◽  
Exchange Interactions ◽  
Lattice Relaxation ◽  
Spin Correlation ◽  
Spin Lattice Relaxation ◽  
Kagome Lattice ◽  
Kagomé Lattice ◽  
Spin Lattice ◽  
High Temperature Expansion

Jarosite family compounds, KFe3(OH)6(SO4)2 (abbreviated to Fe jarosite) and KCr3(OH)6(SO4)2 (Cr jarosite) are typical examples of Heisenberg anti-ferromagnets on the Kagome lattice and have been investigated by means of magnetization and NMR experiments. The susceptibility of Cr jarosite deviates from the Curie–Weiss law due to the short-range spin correlation below about 150 K and shows the magnetic transition at 4.2 K, while Fe jarosite has the transition at 65 K. The measured susceptibility fits well with the calculated one on the high-temperature expansion for the Heisenberg anti-ferromagnet on the Kagome lattice. The values of the exchange interactions of Cr jarosite and Fe jarosite are derived to be JCr = 4.9 K and JFe = 23 K, respectively. The 1H-NMR spectra of Fe jarosite suggest that the ordered spin structure is the q = 0 type 120° configuration with +1 chirality. The transition is considered to be caused by a weak single-ion type anisotropy. The spin-lattice relaxation rate, 1/T1, of Fe jarosite in the ordered phase decreases sharply with decreasing temperature and can be well explained by the two-magnon process of spin wave with the anisotropy. PACS No.: 75.25+z

scholarly journals Synthesis of a d1 titanium fluoride kagome lattice antiferromagnet

2019 ◽  
Author(s):  
Ningxin Jiang ◽  
Arun Ramanathan ◽  
John Bacsa ◽  
Henry La Pierre
Keyword(s):  
Long Range ◽  
Structural Phase ◽  
Magnetic Ordering ◽  
Quantum Spin ◽  
Kagome Lattice ◽  
Weiss Temperature ◽  
Positional Disorder ◽  
Kagomé Lattice ◽  
Planar Array ◽  
Long Range Ordering

The kagome lattice, composed of a planar array of corner-sharing triangles, is one of the most geometrically frustrated lattices. The realization of an S = 1/2 kagome latttice antiferromagnet (KLAF) is of particular interest because it may host an intriguing form of matter, a quantum spin liquid state, which showa long-range entanglement and no magnetic ordering down to 0 K. A few S = 1/2 KLAFs exist, typically based on Cu<sup>2+</sup>, <i>d</i><sup>9</sup> compounds, though they feature structural imperfections. Herein, we present the synthesis of (CH<sub>3</sub>NH<sub>3</sub>)<sub>2</sub>NaTi<sub>3</sub>F<sub>12</sub>, which comprises an S = 1/2 kagome layer that exhibits only one crystallographically distinct Ti<sup>3+</sup>, <i>d</i><sup>1</sup> site, and one bridging fluoride. A static positional disorder is proposed for the intralayer CH<sub>3</sub>NH<sub>3</sub><sup>+</sup>. No structural phase transitions were observed from 1.8 K to 523 K. Despite its spin-freezing behavior, other features - including its negative Curie-Weiss temperature and a lack of long-range ordering - imply that this compound is a highly frustrated magnet with unusual magnetic phase behaviors.<br>

Spin Dynamics and Dirac Nodes in a Kagome Lattice

2019 ◽  
Vol 532 (2) ◽  
pp. 1900350 ◽  
Author(s):  
Daniel Boyko ◽  
Avadh Saxena ◽  
Jason T. Haraldsen
Keyword(s):  
Spin Dynamics ◽  
Kagome Lattice ◽  
Kagomé Lattice

Spin dynamics in classical and quantum Kagome lattice magnets studied by NMR

2007 ◽  
Vol 19 (14) ◽  
pp. 145250 ◽  
Author(s):  
Satoru Maegawa ◽  
Ryousuke Kaji ◽  
Seishi Kanou ◽  
Akira Oyamada ◽  
Masahide Nishiyama
Keyword(s):  
Spin Dynamics ◽  
Kagome Lattice ◽  
Kagomé Lattice
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