Pressure dependence of ferromagnetic phase boundary in BaVSe studied with high-pressure SR

圧力下のSR法で見たBaVSeの強磁性相境界の圧力依存性

杉山 純; 髭本 亘  ; Andreica, D.*; Forslund, O. K.*; Nocerino, E.*; Mnsson, M.*; Sassa, Y.*; Gupta, R.*; Khasanov, R.*; 太田 寛人*; 中村 裕之*

Sugiyama, Jun; Higemoto, Wataru; Andreica, D.*; Forslund, O. K.*; Nocerino, E.*; Mnsson, M.*; Sassa, Y.*; Gupta, R.*; Khasanov, R.*; Ota, Hiroto*; Nakamura, Hiroyuki*

疑一次元物質BaVSeの常圧および高圧下の磁性研究をミュオンスピン緩和測定により行った。常圧では準静的な強磁性状態の出現によるミュオンスピンのゼロ磁場振動がキュリー温度以下で観測された。圧力を印可すると1.5GPaまではキュリー温度の減少が、それより高圧側では急激な上昇がみれらた。この結果および軸方向への強磁性相関を考慮し、高圧下では面内に2つの磁気相関があることが明らかにされた。

The magnetic nature of a quasi-one-dimensional compound, BaVSe, has been investigated with positive muon spin rotation and relaxation measurements at ambient and high pressures. At ambient pressure, the spectrum recorded under zero external magnetic field exhibited a clear oscillation below the Curie temperature due to the formation of quasistatic ferromagnetic order. As pressure increased from ambient pressure, was found to decrease slightly up to about 1.5 GPa, at which point started to increase rapidly with the further increase of the pressure. Based on a strong ferromagnetic interaction along the -axis, the result revealed that there are two magnetic interactions in the ab-plane.