Magnetic compensation and critical behavior in spinel Co2TiO4 | |
Chaocheng Liu2; Xucai Kan2; Xiansong Liu2; Zhitao Zhang1; Jiyu Hu2 | |
刊名 | Physical Chemistry Chemical Physics |
2020-09-14 | |
卷号 | 22 |
ISSN号 | 1463-9076 |
DOI | 10.1039/d0cp03713c |
通讯作者 | Kan, Xucai(kanxucai@ahu.edu.cn) ; Liu, Xiansong(xiansongliu@ahu.edu.cn) ; Zhang, Zhitao(ztzhang@hmfl.ac.cn) |
英文摘要 | We report studies of the complex magnetic ordering, pressure-induced magnetic properties, large exchange bias (EB), spin-glass (SG), critical behavior, and electron spin resonance (ESR) in spinel Co2TiO4. The magnetic compensation behavior occurs in the vicinity of the compensation temperature Tcomp ∼ 32.5 K (defined as the susceptibility χZFC = χFC = 0), which can be attributed to the behavior that the magnetization of two bulk sublattices balances each other completely. The nature of this unusual case is demonstrated by the spin direction upon applied field and A–B sublattice (site) coupling. Specifically, the values of exchange integrals JAA and JBB play a crucial role at lower and higher temperatures, respectively. It is prominent that intrinsic coercivity Hcj increases by 168% at a pressure of 1000 MPa, from which we illustrate the antiferromagnetic (AFM) transition based on magnetic hysteresis loops M(H) and temperature dependent magnetization M(T) curves. The SG behavior of Co2TiO4 is confirmed by a series of reliable measurements and fitting parameters (τ0, zv), and a large EB field is also found through the asymmetry in the M(H) curve. Besides, the critical behavior of Co2TiO4 is studied initially in our present work, and the critical exponents (β, γ, and δ) indicate long-range ferromagnetic (FM) coupling accompanied by a short-range interaction in Co2TiO4. |
资助项目 | National Natural Science Foundation of China[51872004] ; National Natural Science Foundation of China[51802002] ; Education Department of Anhui Province[KJ2018A0039] ; National Innovation Training Program for College Students[201810357006] ; Key Program of the Science and Technology Department of Anhui Province[S201904a09020074] |
WOS关键词 | GLASS BEHAVIOR ; EXCHANGE BIAS ; NICKEL ; STATE ; PHASE ; ORDER |
WOS研究方向 | Chemistry ; Physics |
语种 | 英语 |
出版者 | ROYAL SOC CHEMISTRY |
WOS记录号 | WOS:000572458900066 |
资助机构 | National Natural Science Foundation of China ; Education Department of Anhui Province ; National Innovation Training Program for College Students ; Key Program of the Science and Technology Department of Anhui Province |
内容类型 | 期刊论文 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/92714] |
专题 | 合肥物质科学研究院_中科院强磁场科学中心 |
通讯作者 | Xucai Kan; Xiansong Liu; Zhitao Zhang |
作者单位 | 1.Anhui Province Key Laboratory ofCondensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China 2.Engineering Technology Research Center ofMagnetic Materials, School ofPhysics & Materials Science, Anhui University, Hefei 230601, China |
推荐引用方式 GB/T 7714 | Chaocheng Liu,Xucai Kan,Xiansong Liu,et al. Magnetic compensation and critical behavior in spinel Co2TiO4[J]. Physical Chemistry Chemical Physics,2020,22. |
APA | Chaocheng Liu,Xucai Kan,Xiansong Liu,Zhitao Zhang,&Jiyu Hu.(2020).Magnetic compensation and critical behavior in spinel Co2TiO4.Physical Chemistry Chemical Physics,22. |
MLA | Chaocheng Liu,et al."Magnetic compensation and critical behavior in spinel Co2TiO4".Physical Chemistry Chemical Physics 22(2020). |
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