日本語フィールド
著者：M. Hagihala, X.G. Zheng, T. Kawae題名：Drastic anion substitution effect in deformed pyrochlore lattice Co2(OH)3Cl1-xBrx発表情報：Physica B 巻: 404 ページ: 671-673キーワード：geometrical frustration; Co2(OH)3Cl1-xBrx; spin fluctuation; distorted tetrahedron ; substitution概要：抄録：As a part of an extensive study of the new geometrically frustrated material series M2(OH)3X (M : 3d magnetic ion; X : halogen ion) on deformed pyrochlore lattice we have investigated in detail the magnetism of Co2(OH)3Cl1-xBrx, in which the magnetic state was found to be very sensitive to the anion substitution. Co2(OH)3Br was found to undergo antiferromagnetic transitions at TN1 = 6.2K and TN2 = 4.8K, respectively, which is contrasting as compared to the partial ferromagnetic state in Co2(OH)3Cl. Muon spin precession was observed with additional fast relaxation below TN1, implying coexisting spin-fluctuation. Meanwhile, the partially substituted Co2(OH)3Cl1-xBrx transforms from ferromagnetic to antiferromagnetic by increasing the x ratio. The present work presents a unique system to investigate the critical role of the tetrahedral distortion in geometric frustration.英語フィールド
Author：M. Hagihala, X.G. Zheng, T. KawaeTitle：Drastic anion substitution effect in deformed pyrochlore lattice Co2(OH)3Cl1-xBrxAnnouncement information:Physica B Vol: 404 Page: 671-673Keyword：geometrical frustration; Co2(OH)3Cl1-xBrx; spin fluctuation; distorted tetrahedron ; substitutionAn abstract：As a part of an extensive study of the new geometrically frustrated material series M2(OH)3X (M : 3d magnetic ion; X : halogen ion) on deformed pyrochlore lattice we have investigated in detail the magnetism of Co2(OH)3Cl1-xBrx, in which the magnetic state was found to be very sensitive to the anion substitution. Co2(OH)3Br was found to undergo antiferromagnetic transitions at TN1 = 6.2K and TN2 = 4.8K, respectively, which is contrasting as compared to the partial ferromagnetic state in Co2(OH)3Cl. Muon spin precession was observed with additional fast relaxation below TN1, implying coexisting spin-fluctuation. Meanwhile, the partially substituted Co2(OH)3Cl1-xBrx transforms from ferromagnetic to antiferromagnetic by increasing the x ratio. The present work presents a unique system to investigate the critical role of the tetrahedral distortion in geometric frustration.