Asymmetric spin-orbit interaction and anomalous Galvanomagnetic effect in chiral magnets of 4f-electron system

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400333
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: Ohara Shigeo 名古屋工業大学, 工学(系)研究科(研究院), 教授 (60262953)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: キラル磁性 / ハニカム磁性 / 擬カゴメ構造 / スピン軌道相互作用 / フェルミ面分裂 / 電流磁気効果

Outline of Final Research Achievements

In this study, we measured and compared the magnitude of Fermi surface splitting caused by the spin-orbit interaction for chiral compounds YbNi_3_Al_9_, YbNi_3_Ga_9_, LuNi_3_Al_9_, and LuNi_3_Ga_9_. We also measured the magnetization, magnetoresistance, magnetic structure, and constructed the magnetic phase diagram for the chiral-helical magnet YbNi_3_Al_9_, the collinear antiferromagnet DyNi_3_Ga_9_ and Ising antiferromagnet ErNi_3_Ga_9_, and investigated the relation between magnetic structure and magnetoresistance.
In addition, we have grown new compounds of honeycomb-magnet R_2_Pt_6_Ga_15_ and pseudo-kagome system RRhPb (R : rare-earth ion) and measured fundamental magnetic properties using single crystals.

Free Research Field

低温固体物理