Flux growth and magnetic properties of helimagnetic hexagonal ferrite Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ single crystals

Utsumi, Shigenori*; Tanaka, Seiya*; Maruyama, Kenichi*; Amako, Yasushi*; Kiyanagi, Ryoji ; Nakao, Akiko*; Moriyama, Kentaro*; Ishikawa, Yoshihisa*; 9 of others*

Fabricating large, high-crystalline-quality single-crystal samples of hexagonal ferrite Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ is the first important step to elucidating its helimagnetic structure and developing it for further applications. In this study, single crystals of Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ of various Sc concentrations were successfully grown by the spontaneous crystallization method using Na $_{2}$ O-Fe $_{2}$ O $_{3}$ flux. X-ray diffraction and elemental analysis revealed that the obtained crystals were composed of single-phase Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ of high crystalline quality. The temperature dependence of magnetization and the magnetization curves at 77 K of the = 0.128 crystal exhibited behavior characteristics of helimagnetism. Neutron diffraction measurements of the = 0.128 crystal exhibited magnetic satellite reflection peaks below 211K, proving evidence that Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ behaves as a helimagnetic material.

Language	:	English
Journal	:	ACS Omega (Internet)
Volume	:	5
Number	:	38
Pages	:	p.24890 - 24897
Publication Year/Month	:	2020/09
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Paper URL	:	https://doi.org/10.1021/acsomega.0c03671
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Keywords	:	中性子回折; 磁気構造
Research Facility	:	J-PARC物質・生命科学実験施設
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Article of JAEA R&D Review	:
Cooperating Institute	:	東京理科大学; 公立諏訪東京理科大学; 信州大学; 総合科学研究機構

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Registration No. : AA20200721
JAEA Abstracts No. : 51000398
Paper Submission No. : 26325

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Flux growth and magnetic properties of helimagnetic hexagonal ferrite Ba(FeSc)O single crystals

Flux growth and magnetic properties of helimagnetic hexagonal ferrite Ba(Fe $_{1-x}$ Sc $_{x}$ ) $_{12}$ O $_{19}$ single crystals