Spin fluctuations in Sr 1.6 Ba 0.4 RuO 4 : An inelastic neutron scattering study with polarization analysis
Spin fluctuations in Sr 1.6 Ba 0.4 RuO 4 : An inelastic neutron scattering study with polarization analysis
We present inelastic neutron scattering measurements on the ruthenate Sr1.6Ba0.4RuO4 which is on the hitherto almost unknown Ba-substituted side of the doping phase diagram of Sr2−xAexRuO4 (Ae = Ca, Ba). Unlike the Ca-substituted side of the phase diagram no (quasi)static magnetic peaks can be obser...
Saved in:
Personal Name(s): | Li, Z. W. (Corresponding author) |
---|---|
Guo, H. / Liu, C.-F. / Bourdarot, F. / Schmidt, W. / Skoulatos, M. / Komarek, A. C. | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-ILL; JCNS-ILL JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Physical Review B Physical review / B, 95 95 (2017 2017) 4 4, S. 045105 045105 |
Imprint: |
Woodbury, NY
Inst.
2017
|
DOI: |
10.1103/PhysRevB.95.045105 |
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://dx.doi.org/10.1103/PhysRevB.95.045105 in citations.
We present inelastic neutron scattering measurements on the ruthenate Sr1.6Ba0.4RuO4 which is on the hitherto almost unknown Ba-substituted side of the doping phase diagram of Sr2−xAexRuO4 (Ae = Ca, Ba). Unlike the Ca-substituted side of the phase diagram no (quasi)static magnetic peaks can be observed in Sr1.6Ba0.4RuO4. Instead, incommensurate spin fluctuations can be observed around q0=(±0.3,±0.3,0). Both the absolute intensity of χ''(Q,ω) and its energy and temperature dependence as well as the anisotropy ratio χ''c/χ''a,b resemble the ones in Sr2RuO4. Hence, a random potential implied by the substitution of huge Ba ions as well as the induced increase of interatomic distances has less impact on the magnetic properties than octahedral tilts implied by Ca substitution. Moreover, any ferromagnetic spin fluctuations are either absent in Sr1.6Ba0.4RuO4 or below the detection limit. |