Structural and magnetic properties of co-doped (La,Sr)TiO3−δ nanocrystals

Author

Peng Liu ; Xuefeng Wang ; Lixin Yang ; Fengqi Song ; Bin Liu ; Jianguo Wan ; Rong Zhang

Author_Institution

Dept. of Phys., Soochow Univ., Suzhou, China

fYear

2010

fDate

14-16 Oct. 2010

Firstpage

569

Lastpage

570

Abstract

In this paper, we report on a structural and magnetic investigation of a series of Co-doped La_0.4Sr_0.6TiO_3-δ DMS nanocrystals synthesized by a solvothermal technique [3] and subsequently treated by a high-temperature (800°C) annealing in Ar atmosphere. We found that no secondary phases or contaminations could be detected for samples with Co dopant concentration below 5 at %, indicating that the observed ferromagnetic signals are intrinsic in this strongly correlated system. The origin of magnetism could be correlated to the ferromagnetic coupling of Co dopant via the local charge-compensating oxygen vacancy F-center, which is different from the case of Co-doped ZnO [2,3].

Keywords

F-centres; annealing; cobalt; ferromagnetic materials; lanthanum compounds; nanofabrication; nanomagnetics; nanostructured materials; strongly correlated electron systems; strontium compounds; vacancies (crystal); Ar atmosphere; Co dopant concentration; Co-doped DMS nanocrystals; La_0.4Sr_0.6TiO_3-δ:Co; ferromagnetic coupling; ferromagnetic signals; high-temperature annealing; local charge-compensating oxygen vacancy F-center; magnetic properties; solvothermal technique; strongly correlated system; structural properties; temperature 800 degC;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electron Sources Conference and Nanocarbon (IVESC), 2010 8th International

Conference_Location

Nanjing

Print_ISBN

978-1-4244-6645-0

Type

conf

DOI

10.1109/IVESC.2010.5644184

Filename

5644184