Tatsuya Yanagisawa

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The magnetic phase diagram for antiferro-quadrupole (AFQ) ordering in tetragonal HoB2C2 has been investigated by measurements of elastic constants C11, C44 and C66 in fields along the basal x-y plane as well as the principal [001]-axis. The hybrid magnet (GAMA) in Tsukuba Magnetic Laboratory was employed for high field measurements up to 30 T. The AFQ phase(More)
Elastic neutron-scattering experiment was performed on the heavy-fermion superconductor URu2Si2 under uniaxial stress in order to search a sign of a hidden order parameter. Contour maps of neutron-scattering at 1.5 K were achieved by mesh scanning. No additional magnetic signal exists in (h0l) and (hhl) planes except for a well-known weak antiferromagnetic(More)
We have performed precise dc magnetization measurements for a single crystal of UBe(13) down to 0.14 K, up to 80 kOe. We observed a magnetic anomaly in the superconducting (SC) mixed state at a field, named H(Mag)(*) (~ 26 kOe, at 0.14 K), implying that UBe(13) has a magnetically unusual SC state. We studied the magnetization curves of UBe(13), assuming(More)
We have been using FT or FMEA...etc to design our new products till now. In this study, we find that the new vehicle product development can be more efficient if we adopt STAMP/STPA, which shows the complicated relationship between human and machine and feedback the hazard in an early development stage. 1 Background After the Great East Japan Earthquake(More)
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