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Spin dynamics of S=2 triangular lattice antiferromagnet have been investigated by the submillimeter and the millimeter wave ESR measurements of polycrystalline samples of InMnO3. Single absorption line is observed in whole temperature range from 2.0 K to 265 K. The resonance field shifts due to the development of internal field are observed below 40 K. The spin dynamics of InMnO3 will be discussed...
Cu3(OH)4SO4, which was obtained by the hydorothermal synthesis, was studied by our high frequency electron spin resonance (ESR) measurements. It has an interesting magnetic structure which consists of triple chains of Cu2+ spins (s=1/2). It undergoes the 3D-transition below 5.3 K. In the ordered state, the magnetic moment of the central chain becomes zero. This interesting behavior is called as "idle...
In our facility, FIR center Fukui University Japan, several radiation sources of millimeter- and submillimeter-wave are available in addition to high power and high frequency gyrotrons that have been developed successfully. We have developed millimeter and submillimeter wave ESR measurement systems, mainly, to study magnetism at low temperature and in high magnetic field. The ESR measurement systems...
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