Koji Munakata

Pressure-induced changes in the magnetic and valence state of EuFe 2 As 2

We present the results of electrical resistivity, ac specific heat, magnetic susceptibility, X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) of the ternary iron arsenide EuFe2As2 single crystal under pressure. Applying pressure leads to a continuous suppression of the antiferromagnetism associated with Fe moments and the antiferromagnetic transition temperature becomes zero in the vicinity of a critical pressure Pc ~2.5-2.7 GPa. Pressure-induced re-entrant superconductivity, which is highly sensitive to the homogeneity of the pressure, only appears in the narrow pressure region in the vicinity of Pc due to the competition between superconductivity and the antiferromagnetic ordering of Eu2+ moments. The antiferromagnetic state of Eu2+ moments changes to the ferromagnetic state above 6 GPa. We also found that the ferromagnetic order is suppressed with further increasing pressure, which is connected with a valence change of Eu ions.

Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe 2 Se 3

Magnetism in the insulating BaFe

SENJU: a new time-of-flight single-crystal neutron diffractometer at J-PARC

{}_{2}

Instrument Design and Performance Evaluation of a New Single Crystal Neutron Diffractometer SENJU at J-PARC

Se

Mechanism of Field Induced Fermi Liquid State in Yb-Based Heavy-Fermion Compound: X-ray Absorption Spectroscopy and Nuclear Magnetic Resonance Studies of YbCo2Zn20

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Single Crystal Neutron Diffraction Study of High Neutron Absorbing Compound EuGa4

was examined through susceptibility, specific heat, resistivity, and neutron diffraction measurements. After formation of a short-range magnetic correlation, a long-range ordering was observed below

High-pressure environments of single crystal neutron diffractometer SENJU/J-PARC

{T}_{\mathrm{N}}\ensuremath{\sim}255

Temperature dependence of the structure of 2-(2′-hydroxyphenyl)benzimidazole studied by neutrons

K. The transition is obscured by bulk properties. Magnetic moments (

Magnetic Structure of Divalent Europium Compound EuGa4 Studied by Single-Crystal Time-of-Flight Neutron Diffraction

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Current Status of an Extreme Environment Single Crystal Neutron Diffractometer SENJU at J-PARC

) are arranged to form a Fe