Carrier type change induced by fluorine doping in spin-chain compound Ca3Co2O6

doi:10.1039/c6ra25052a

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院固体物理研究所

	Carrier type change induced by fluorine doping in spin-chain compound Ca3Co2O6
	Song, Jiyue 1,2; Zhao, Bangchuan1 ; Huang, Yanan 1; Qin, Yanfeng 1,2; Zhou, Jiafeng 1,2; Song, Wenhai 1; Sun, Yuping 1,3,4
刊名	RSC ADVANCES
	2017
卷号	7 期号:5 页码:2745-2752
DOI	10.1039/c6ra25052a
文献子类	Article
英文摘要	The structural, magnetic, electrical, and thermoelectric properties of fluorine (F)-doped Ca3Co2O6 were investigated systematically. Based on the use of X-ray diffraction, X-ray photoelectron spectroscopy spectra, and magnetic data, it was concluded that part of the Co3+ ions at octahedral sites would transfer into Co2+ because of the substitution of F- for O2-. The induced Co2+ ions are antiferromagnetically coupled with the nearest neighboring Co3+. The room-temperature resistivity decreases monotonously with the increase of fluorine (F)-doping content, x, and it is suggested that this is related to the increased carrier mobility. The resistivity curves of the samples with x >= 0.4 show an anomaly at T* similar to 320 K, which is considered to be related to the change of activation energy (Ea). The room temperature thermopower S-300 K changed from a positive value of 686.6 mu V K-1 to a negative value of -333.1 mV K-1 as x increases from 0 to 0.4 and considering this with the Hall coefficient result, it is concluded that suitable F-doping in Ca3Co2O6 can change the type of the majority of carriers from p to n with a decreased resistivity. The thermal conductivity, k of the n-type samples is much larger than that of the p-type, and the k of both the p-type and n-type samples decreases monotonously with increasing x. The anomaly of k near x = 0.4 is suggested to originate from the decreased grain boundary scattering and the sudden decrease of Ea at the critical point of the carrier type change.
WOS关键词	HIGH THERMOELECTRIC FIGURE ; ONE-DIMENSIONAL CA3CO2O6 ; SINGLE-CRYSTALS ; TEMPERATURE ; MAGNETORESISTANCE ; BEHAVIOR ; MERIT ; FE ; CU
WOS研究方向	Chemistry
语种	英语
WOS记录号	WOS:000393748600040
资助机构	National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11174293) ; 11174293) ; 11174293) ; 11174293) ; 11174293) ; 11174293) ; 11174293) ; 11174293) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Key Basic Research(2011CBA00111) ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; National Nature Science Foundation of China(U1232140 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11504380 ; 11174293) ; 11174293) ; 11174293) ; 11174293) ; 11174293) ; 11174293) ; 11174293) ; 11174293)
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/32813]
专题	合肥物质科学研究院_中科院固体物理研究所
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China 4.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Song, Jiyue,Zhao, Bangchuan,Huang, Yanan,et al. Carrier type change induced by fluorine doping in spin-chain compound Ca3Co2O6[J]. RSC ADVANCES,2017,7(5):2745-2752.
APA	Song, Jiyue.,Zhao, Bangchuan.,Huang, Yanan.,Qin, Yanfeng.,Zhou, Jiafeng.,...&Sun, Yuping.(2017).Carrier type change induced by fluorine doping in spin-chain compound Ca3Co2O6.RSC ADVANCES,7(5),2745-2752.
MLA	Song, Jiyue,et al."Carrier type change induced by fluorine doping in spin-chain compound Ca3Co2O6".RSC ADVANCES 7.5(2017):2745-2752.