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Zhu, ZH; Gao, DQ; Dong, CH; Yang, GJ; Zhang, J; Zhang, JL; Shi, ZH; Gao, H; Luo, HG; Xue, DS; Xue, DS (reprint author), Lanzhou Univ, MOE, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China.
Coexistence of ferromagnetism and superconductivity in YBCO nanoparticles
Source PublicationPHYSICAL CHEMISTRY CHEMICAL PHYSICS
Language英语
KeywordParticle-size Magnetism Fields State Uge2
AbstractNanoparticles of superconducting YBa2Cu3O7-delta were synthesized via a citrate pyrolysis technique. Room temperature ferromagnetism was revealed in the samples by a vibrating sample magnetometer. Electron spin resonance spectra at selected temperatures indicated that there is a transition from the normal to the superconducting state at temperatures below 100 K. The M-T curves with various applied magnetic fields showed that the superconducting transition temperatures are 92 K and 55 K for the air-annealed and the post-annealed samples, respectively. Compared to the air-annealed sample, the saturation magnetization of the sample by reheating the air-annealed one in argon atmosphere is enhanced but its superconductivity is weakened, which implies that the ferromagnetism maybe originates from the surface oxygen defects. By superconducting quantum interference device measurements, we further confirmed the ferromagnetic behavior at high temperatures and interesting upturns in field cooling magnetization curves within the superconducting region are found. We attributed the upturn phenomena to the coexistence of ferromagnetism and superconductivity at low temperatures. Room temperature ferromagnetism of superconducting YBa2Cu3O7-delta nanoparticles has been observed in some previous related studies, but the issue of the coexistence of ferromagnetism and superconductivity within the superconducting region is still unclear. In the present work, it will be addressed in detail. The cooperation phenomena found in the spin-singlet superconductors will help us to understand the nature of superconductivity and ferromagnetism in more depth.
2012
ISSN1463-9076
Volume14Issue:11Pages:3859-3863
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Science Fund for Distinguished Young Scholars [50925103]; Chinese ministry of Education [309027]; National Natural Science Foundation of China [11034004] ; National Science Fund for Distinguished Young Scholars [50925103]; Chinese ministry of Education [309027]; National Natural Science Foundation of China [11034004] ; National Science Fund for Distinguished Young Scholars [50925103]; Chinese ministry of Education [309027]; National Natural Science Foundation of China [11034004] ; National Science Fund for Distinguished Young Scholars [50925103]; Chinese ministry of Education [309027]; National Natural Science Foundation of China [11034004]
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Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15194
Collection理论物理所科研产出_SCI论文
Corresponding AuthorXue, DS (reprint author), Lanzhou Univ, MOE, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China.
Recommended Citation
GB/T 7714
Zhu, ZH,Gao, DQ,Dong, CH,et al. Coexistence of ferromagnetism and superconductivity in YBCO nanoparticles[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2012,14(11):3859-3863.
APA Zhu, ZH.,Gao, DQ.,Dong, CH.,Yang, GJ.,Zhang, J.,...&Xue, DS .(2012).Coexistence of ferromagnetism and superconductivity in YBCO nanoparticles.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,14(11),3859-3863.
MLA Zhu, ZH,et al."Coexistence of ferromagnetism and superconductivity in YBCO nanoparticles".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 14.11(2012):3859-3863.
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