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Journal Articles

Magnetic ordering and spin dynamics in potassium jarosite; A Heisenberg kagom$'e$ lattice antiferromagnet

Nishiyama, Masahide*; Maegawa, Satoru*; Inami, Toshiya; Oka, Yoshio*

Physical Review B, 67(22), p.224435_1 - 224435_11, 2003/06

https://doi.org/10.1103/PhysRevB.67.224435
 Times Cited Count：48 Percentile：85.54(Materials Science, Multidisciplinary)

The spin dynamics of the Heisenberg kagom$'e$ lattice antiferromagnet, potassium jarosite KFe$$_{3}$$(OH)$$_{6}$$(SO$$_{4}$$)$$_{2}$$, have been investigated by means of NMR. The spin-lattice relaxation rate, 1/${it T}$$$_{1}$$, in the ordered phase decreases sharply with lowering temperature. The experimental rate is well explained by the two-magnon process of the spin waves having an energy gap of 15 K. The temperature dependence of the sublattice magnetization also supports the existence of the spin wave. These are the first experimental evidence that the low-energy excitation in the frustrated classical kagom$'e$ lattice antiferromagnet is described by the spin wave. We calculate the spin wave in the q = 0 type 120 $$^{circ}$$ spin structure with weak single-ion-type anisotropy, and discuss the characteristics of the spin fluctuations in the Heisenberg kagom$'e$ lattice antiferromagnet.

Journal Articles

Magnetic ordering in the kagom$'e$ lattice antiferromagnet KCr$$_3$$(OD)$$_6$$(SO$$_4$$)$$_2$$

Inami, Toshiya; Morimoto, T.*; Nishiyama, Masahide*; Maegawa, Satoru*; Oka, Yoshio*; Okumura, H.*

Physical Review B, 64(5), p.054421_1 - 054421_6, 2001/08

https://doi.org/10.1103/PhysRevB.64.054421
 Times Cited Count：33 Percentile：81.06(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Magnetic structure of the kagome lattice antiferromagnet potassium jarosite KFe$$_{3}$$(OH)$$_{6}$$(SO$$_{4}$$)$$_{2}$$

Inami, Toshiya; Nishiyama, Masahide*; Maegawa, Satoru*; Oka, Yoshio*

Physical Review B, 61(18), p.12181 - 12186, 2000/05

https://doi.org/10.1103/PhysRevB.61.12181
 Times Cited Count：24 Percentile：73.39(Materials Science, Multidisciplinary)

no abstracts in English

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