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Report No.

Neutron scattering study toward to development of energy-efficient environment-friendly refrigeration technology

Kitazawa, Hideaki*; Kawamura, Yukihiko*; Mamiya, Hiroaki*; Terada, Noriki*; Suzuki, Hiroyuki*; Tsujii, Naohito*; Doenni, A.*; Kaneko, Koji   ; Metoki, Naoto   ; Igawa, Naoki   ; Hoshikawa, Akinori*; Ishigaki, Toru*

In this paper, we will demonstrate some application of neutron scattering for magnetic refrigerant materials Ho$$_5$$Pd$$_2$$ and dilute spinel ferrites. In order to determine the magnetic structure, we have performed neutron powder diffraction experiments at JRR-3. The magnetic peaks with a propagation vector k = (0.18, 0.18, 0.18) are gradually developing. The peak width is significantly broader even 5 K, indicating a short-range order with a long wave length.



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