Antiferromagnetic magnetic transition and spin fluctuations in the deformed pyrochlore compound β-Fe2(OH)3Cl

被引：22

作者：

Fujihala, M. ^{[1
]}

Hagihala, M. ^{[1
]}

Zheng, X. G. ^{[1
,2
]}

Kawae, T. ^{[3
]}

机构：

[1] Saga Univ, Grad Sch Sci & Engn, Dept Phys, Saga 8408502, Japan

[2] Saga Univ, Fac Sci & Engn, Dept Phys, Saga 8408502, Japan

[3] Kyushu Univ, Fac Engn, Dept Appl Quantum Phys & Nucl Engn, Fukuoka 8190395, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 02期

基金：

日本学术振兴会;

关键词：

GEOMETRIC FRUSTRATION; LATTICE; RELAXATION; SYSTEM; CU2CL(OH)(3); FERROMAGNET; DYNAMICS; BEARING; STATE; ICE;

D O I：

10.1103/PhysRevB.82.024425

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetism of the rhombohedral structure Fe-2(OH)(3)Cl [beta-Fe-2(OH)(3)Cl], a member of the geometric frustration series M-2(OH)(3)X where the magnetic ions form a deformed pyrochlore lattice, was studied using dc and ac susceptibilities, heat-capacity, neutron powder-diffraction, and muon spin relaxation (mu SR) measurements. Antiferromagnetic transition was observed at T-N=9.0 K with a much larger Curie-Weiss temperature theta(w) of approximately -64 K, suggesting that Fe-2(OH)(3)Cl is a geometrically frustrated magnet. Neutron-diffraction studies revealed the transition into a long-range antiferromagnetic order below T-N=9.0 K with the Fe2+ spins on the triangular lattice planes disordered, and the other ones on the kagome lattice planes having frozen moments of less than 70% of the full Fe2+ moment. Spin fluctuations below T-N were verified further using mu SR studies. The magnetically phase-separated feature and the spin fluctuation coexisting with a long-range magnetic order are considered to be of great interest for studying geometric frustration and the behavior of S = 2 spin systems on prochlore and kagome lattices.

引用

页数：8

共 46 条

[1] Direct evidence for a dynamical ground state in the highly frustrated Tb2Sn2O7 pyrochlore [J].

Bert, F. ;

Mendels, P. ;

Olariu, A. ;

Blanchard, N. ;

Collin, G. ;

Amato, A. ;

Baines, C. ;

Hillier, A. D. .

PHYSICAL REVIEW LETTERS, 2006, 97 (11)

[2] Spin ice state in frustrated magnetic pyrochlore materials [J].

Bramwell, ST ;

Gingras, MJP .

SCIENCE, 2001, 294 (5546) :1495-1501

[3] Frustration in Ising-type spin models on the pyrochlore lattice [J].

Bramwell, ST ;

Harris, MJ .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (14) :L215-L220

[4] Spin dynamics and magnetic order in magnetically frustrated Tb2Sn2O7 [J].

de Réotier, PD ;

Yaouanc, A ;

Keller, L ;

Cervellino, A ;

Roessli, B ;

Baines, C ;

Forget, A ;

Vaju, C ;

Gubbens, PCM ;

Amato, A ;

King, PJC .

PHYSICAL REVIEW LETTERS, 2006, 96 (12)

[5] Probing magnetic excitations, fluctuations and correlation lengths by muon spin relaxation and rotation techniques [J].

de Réotier, PD ;

Gubbens, PCM ;

Yaouanc, A .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (40) :S4687-S4705

[6] Scale-Free Antiferromagnetic Fluctuations in the s=1/2 Kagome Antiferromagnet Herbertsmithite [J].

de Vries, M. A. ;

Stewart, J. R. ;

Deen, P. P. ;

Piatek, J. O. ;

Nilsen, G. J. ;

Ronnow, H. M. ;

Harrison, A. .

PHYSICAL REVIEW LETTERS, 2009, 103 (23)

[7]

Diep HT, 2005, FRUSTRATED SPIN SYSTEMS, P1, DOI 10.1142/9789812567819

[8] Spin-glass state in the mixed system (Co1-xFex)2(OH)3Cl on deformed pyrochlore lattice [J].

Fujihala, M. ;

Hagihala, M. ;

Zheng, X. G. ;

Kawae, T. .

PHYSICA B-CONDENSED MATTER, 2009, 404 (5-7) :674-676

[9] Glassy statics and dynamics in the chemically ordered pyrochlore anti-ferromagnet Y2Mo2O7 [J].

Gardner, JS ;

Gaulin, BD ;

Lee, SH ;

Broholm, C ;

Raju, NP ;

Greedan, JE .

PHYSICAL REVIEW LETTERS, 1999, 83 (01) :211-214

[10] Cooperative paramagnetism in the geometrically frustrated pyrochlore antiferromagnet Tb2Ti2O7 [J].

Gardner, JS ;

Dunsiger, SR ;

Gaulin, BD ;

Gingras, MJP ;

Greedan, JE ;

Kiefl, RF ;

Lumsden, MD ;

MacFarlane, WA ;

Raju, NP ;

Sonier, JE ;

Swainson, I ;

Tun, Z .

PHYSICAL REVIEW LETTERS, 1999, 82 (05) :1012-1015

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