Project Details
Projekt
Interaction of subthermal magnons and phonons and their role for the transverse Seebeck effect
Subject Area
Experimental Condensed Matter Physics
Term
from 2014 to 2019
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 257847002
We plan to investigate interaction between subthermal magnons and phonons in the gigahertz frequency interval by applying a gradient of either magnon or phonon temperatures with targeting the understanding of their role in the transverse spin Seebeck effect (TSSE). Particular attention will be paid to magnons in YIG films with energies close to the minimum of their spectrum, whereas both incoherent magnons and Bose-Einstein condensates (BEC) will be addressed. Properties of these magnons in thermal gradient as well as under influence of acoustic spin pumping at gigahertz frequencies will be studied. Time-resolved studies of TSSE will be performed in two model systems: YIG/Pt and NiFe/Pt, whereas gradients of magnon temperature will be created using microwave pumping or spin-current injections, correspondingly. Taking advantage of a difference between magnon-magnon and magnon-phonon times, time-resolved measurements will clarify the role of subthermal magnons in the effect.
DFG Programme
Priority Programmes
Subproject of
SPP 1538:
Spin Caloric Transport (SpinCaT)
