59Co and 75As NMR Investigation of the Lightly Doped Ba[Fe(1-x)Co(x)]2As2 (x =0.02, 0.04)
Journal Article
·
· Physical Review B
- McMaster University
- ORNL
We investigate the electronic properties of Ba[Fe(1-x)Co(x)]2As2 (x =0.02, 0.04) in the lightly electron-doped regime by 59Co and 75As NMR. We demonstrate that Co doping significantly suppresses the magnetic ordering temperature to the SDW state, T_{SDW}. Furthermore, ordered moments below T_{SDW} exhibit large distribution. Strong spin fluctuations remain even below T_{SDW}, persisting all the way down to 4.2 K. We find no signature of additional freezing of spin degrees of freedom unlike the case of the lightly hole-doped stripe phase of the cuprates.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 965859
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Vol. 79; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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