Non-magnetic ion site disorder effects on the quantum magnetism of a spin-1/2 equilateral triangular lattice antiferromagnet

doi:10.1088/1361-648X/ac5703

IMR OpenIR

	Non-magnetic ion site disorder effects on the quantum magnetism of a spin-1/2 equilateral triangular lattice antiferromagnet
	Huang, Q.1; Rawl, R.1; Xie, W. W.2; Chou, E. S.3; Zapf, V. S.4; Ding, X. X.4; Mauws, C.5; Wiebe, C. R.5,6,7; Feng, E. X.8; Cao, H. B.8; Tian, W.8; Ma, J.9,10; Qiu, Y.11; Butch, N.11; Zhou, H. D.1,3
通讯作者	Huang, Q.(qhuang11@vols.utk.edu)
	2022-05-18
发表期刊	JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN	0953-8984
卷号	34 期号:20 页码:10
摘要	With the motivation to study how non-magnetic ion site disorder affects the quantum magnetism of Ba3CoSb2O9, a spin-1/2 equilateral triangular lattice antiferromagnet, we performed DC and AC susceptibility, specific heat, elastic and inelastic neutron scattering measurements on single crystalline samples of Ba2.87Sr0.13CoSb2O9 with Sr doping on non-magnetic Ba2+ ion sites. The results show that Ba2.87Sr0.13CoSb2O9 exhibits (i) a two-step magnetic transition at 2.7 K and 3.3 K, respectively; (ii) a possible canted 120 degree spin structure at zero field with reduced ordered moment as 1.24 mu (B)/Co; (iii) a series of spin state transitions for both H parallel to ab-plane and H parallel to c-axis. For H parallel to ab-plane, the magnetization plateau feature related to the up-up-down phase is significantly suppressed; (iv) an inelastic neutron scattering spectrum with only one gapped mode at zero field, which splits to one gapless and one gapped mode at 9 T. All these features are distinctly different from those observed for the parent compound Ba3CoSb2O9, which demonstrates that the non-magnetic ion site disorder (the Sr doping) plays a complex role on the magnetic properties beyond the conventionally expected randomization of the exchange interactions. We propose the additional effects including the enhancement of quantum spin fluctuations and introduction of a possible spatial anisotropy through the local structural distortions.
关键词	geometrically frustrated magnet site disorder phase transitions
资助者	NSF-DMR through Award ; National Science Foundation ; US Department of Energy ; State of Florida ; US DOE BES Early Career Award ; National Science and Engineering Research Council of Canada (NSERC) ; Canadian Foundation for Innovation (CFI) ; Canada Research Chair programme ; NSERC ; Beckman Young Investigator Award ; National Science Foundation of China
DOI	10.1088/1361-648X/ac5703
收录类别	SCI
语种	英语
资助项目	NSF-DMR through Award[DMR-2003117] ; National Science Foundation[DMR-1508249] ; National Science Foundation[DMR-1157490] ; US Department of Energy ; State of Florida ; US DOE BES Early Career Award[KC0402020] ; US DOE BES Early Career Award[DE-AC05-00OR22725] ; National Science and Engineering Research Council of Canada (NSERC) ; Canadian Foundation for Innovation (CFI) ; Canada Research Chair programme ; NSERC ; Beckman Young Investigator Award ; National Science Foundation of China[11774223] ; National Science Foundation of China[U2032213]
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:000769133300001
出版者	IOP Publishing Ltd
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/173108
专题	中国科学院金属研究所
通讯作者	Huang, Q.
作者单位	1.Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA 2.Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA 3.Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA 4.Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA 5.Univ Manitoba, Dept Chem, Winnipeg, MB R3T 2N2, Canada 6.Univ Winnipeg, Dept Chem, Winnipeg, MB R3B 2E9, Canada 7.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada 8.Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA 9.Shanghai Jiao Tong Univ, Sch Phys & Astron, Lab Artificial Struct & Quantum Control, Shanghai 200240, Peoples R China 10.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 11.NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA
推荐引用方式 GB/T 7714	Huang, Q.,Rawl, R.,Xie, W. W.,et al. Non-magnetic ion site disorder effects on the quantum magnetism of a spin-1/2 equilateral triangular lattice antiferromagnet[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2022,34(20):10.
APA	Huang, Q..,Rawl, R..,Xie, W. W..,Chou, E. S..,Zapf, V. S..,...&Zhou, H. D..(2022).Non-magnetic ion site disorder effects on the quantum magnetism of a spin-1/2 equilateral triangular lattice antiferromagnet.JOURNAL OF PHYSICS-CONDENSED MATTER,34(20),10.
MLA	Huang, Q.,et al."Non-magnetic ion site disorder effects on the quantum magnetism of a spin-1/2 equilateral triangular lattice antiferromagnet".JOURNAL OF PHYSICS-CONDENSED MATTER 34.20(2022):10.