This title appears in the Scientific Report :
2019
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevLett.122.217003 in citations.
Please use the identifier: http://hdl.handle.net/2128/22398 in citations.
Coexistence of Ferromagnetic and Stripe-Type Antiferromagnetic Spin Fluctuations in YFe 2 Ge 2
Coexistence of Ferromagnetic and Stripe-Type Antiferromagnetic Spin Fluctuations in YFe 2 Ge 2
We report neutron scattering measurements of single-crystalline YFe2Ge2 in the normal state, which has the same crystal structure as the 122 family of iron pnictide superconductors. YFe2Ge2 does not exhibit long-range magnetic order but exhibits strong spin fluctuations. Like the iron pnictides, YFe...
Saved in:
Personal Name(s): | Wo, Hongliang |
---|---|
Wang, Qisi / Shen, Yao / Zhang, Xiaowen / Hao, Yiqing / Feng, Yu / Shen, Shoudong / He, Zheng / Pan, Bingying / Wang, Wenbin / Nakajima, K. / Ohira-Kawamura, S. / Steffens, P. / Boehm, M. / Schmalzl, K. / Forrest, T. R. / Matsuda, M. / Zhao, Yang / Lynn, J. W. / Yin, Zhiping / Zhao, Jun (Corresponding author) | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-ILL; JCNS-ILL JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Physical review letters, 122 (2019) 21, S. 217003 |
Imprint: |
College Park, Md.
APS
2019
|
DOI: |
10.1103/PhysRevLett.122.217003 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) Materials and Processes for Energy and Transport Technologies Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States Controlling Collective States |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/22398 in citations.
We report neutron scattering measurements of single-crystalline YFe2Ge2 in the normal state, which has the same crystal structure as the 122 family of iron pnictide superconductors. YFe2Ge2 does not exhibit long-range magnetic order but exhibits strong spin fluctuations. Like the iron pnictides, YFe2Ge2 displays anisotropic stripe-type antiferromagnetic spin fluctuations at (π, 0, π). More interesting, however, is the observation of strong spin fluctuations at the in-plane ferromagnetic wave vector (0, 0, π). These ferromagnetic spin fluctuations are isotropic in the (H, K) plane, whose intensity exceeds that of stripe spin fluctuations. Both the ferromagnetic and stripe spin fluctuations remain gapless down to the lowest measured energies. Our results naturally explain the absence of magnetic order in YFe2Ge2 and also imply that the ferromagnetic correlations may be a key ingredient for iron-based materials. |