Neutron scattering study on the possibility of multipolar order in NdB4
Project/Area Number |
25390133
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Quantum beam science
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Research Institution | Japan Atomic Energy Agency |
Principal Investigator |
YAMAUCHI Hiroki 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 物質科学研究センター, 研究副主幹 (50367827)
|
Research Collaborator |
WATANUKI Ryuta
|
Project Period (FY) |
2013-04-01 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
|
Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
Keywords | 磁気秩序 / 多極子秩序 / シャストリー・サザーランド格子 / 希土類化合物 / 中性子散乱 / 四極子秩序 / 八極子秩序 / モノクロメーター |
Outline of Final Research Achievements |
Neutron diffraction experiments were carried out to characterize the order parameters in an unknown intermediate phase, called phase II, of NdB4 showing three successive phase transitions. We found the antiferromagnetic (AFM) reflections with q0 = (0, 0, 0) in phase II. Group representation analysis was employed to deduce symmetry-allowed magnetic structures that were constrained with the crystal symmetry and the propagation vector(s) of the magnetic order. The magnetic reflections of powder diffraction patterns were successfully explained by postulating a coplanar structure with static magnetic moments in the tetragonal ab-plane. The magnetic structure in phase II was uniquely determined to be a linear combination of two noncolinear AFM structures. We propose that the quadrupolar interaction holds the key to stabilizing the noncollinear structure and quadrupolar order. Here, geometrical frustration would play an essential role in suppressing the dominance of the magnetic interaction.
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Report
(5 results)
Research Products
(8 results)
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[Presentation] 新しいマンガン化合物Mn3RhSiの構造と磁性2016
Author(s)
山内宏樹, 社本真一, 近藤啓悦, 石角元志, 萩原雅人, Songxue Chi, Jaime A. Fernandez-Baca
Organizer
日本中性子科学会第16回年会
Place of Presentation
名古屋大学 豊田講堂(愛知県名古屋市)
Year and Date
2016-12-01
Related Report
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[Presentation] NdB4の中性子散乱による研究2016
Author(s)
目時直人, 山内宏樹, 綿貫竜太, 鈴木和也, 萩原雅人, 益田隆嗣, 松田雅昌, Songxue Chi, Jaime A. Fernandez-Baca
Organizer
日本物理学会2016年秋季大会
Place of Presentation
金沢大学 角間キャンパス(石川県金沢市)
Year and Date
2016-09-13
Related Report
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[Presentation] NdB4における逐次相転移2016
Author(s)
山内宏樹, 目時直人, 綿貫竜太, 鈴木和也, Songxue Chi, Jaime A. Fernandez-Baca, 金子耕士, 川崎卓郎, 大原高志, 鬼柳亮嗣, 花島隆泰
Organizer
日本物理学会第71回年次大会
Place of Presentation
東北学院大学泉キャンパス(宮城県仙台市)
Year and Date
2016-03-19
Related Report
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[Presentation] 多段相転移を示すNdB4の中性子散乱2015
Author(s)
山内宏樹, 綿貫竜太, Songxue Chi, Jaime A. Fernandez-Baca, 金子耕士, 川崎卓郎, 鬼柳亮嗣, 花島隆泰
Organizer
日本中性子科学会第15回年会
Place of Presentation
和光市民文化センター・サンアゼリア(埼玉県和光市)
Year and Date
2015-12-10
Related Report
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