Stroboscopic time-of-flight neutron diffraction in long pulsed magnetic fields

Taro Nakajima; Masao Watanabe; Yasuhiro Inamura; Kazuki Matsui; Tomoki Kanda; Tetsuya Nomoto; Kazuki Ohishi; Yukihiko Kawamura; Hiraku Saito; Hiromu Tamatsukuri; Noriki Terada; Yoshimitsu Kohama

doi:10.1103/physrevresearch.6.023109

Journal article Stroboscopic time-of-flight neutron diffraction in long pulsed magnetic fields

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Taro Nakajima, Masao Watanabe, Yasuhiro Inamura, Kazuki Matsui, Tomoki Kanda, Tetsuya Nomoto, Kazuki Ohishi, Yukihiko Kawamura, Hiraku Saito, Hiromu Tamatsukuri, Noriki Terada, Yoshimitsu Kohama. Stroboscopic time-of-flight neutron diffraction in long pulsed magnetic fields. Physical Review Research. 2024, 6 (2), 023109. https://doi.org/10.1103/physrevresearch.6.023109

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We present proof-of-principle experiments of stroboscopic time-of-flight (TOF) neutron diffraction in long pulsed magnetic fields. By utilizing electric double-layer capacitors, we developed a long pulsed magnet for neutron diffraction measurements, which generates pulsed magnetic fields with the full widths at the half maximum of more than 102 ms. The field variation is slow enough to be approximated as a steady field within the time scale of a polychromatic neutron pulse passing through a sample placed in a distance of the order of 101 m from the neutron source. This enables us to efficiently explore the reciprocal space using a wide range of neutron wavelength in high magnetic fields. We applied this technique to investigate field-induced magnetic phases in the triangular lattice antiferromagnets CuFe1−xGaxO2 (x = 0,0.035).

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