Scientific Achievement

Researchers in the Quantum Materials program revealed that nonlocal spin transport persists down to the zero-field limit, highlighting the critical importance of field-free operation for maximizing magnonic signals.

Significance and Impact

Propagation of magnons in the archetypical magnetic insulator yttrium iron garnet (YIG) could transform low-power and low-loss data communication. In the low-field regime, incoherent spin waves can serve as a probe for coherent magnetization switching in YIG films with a potential for being used as ultra-sensitive sensors for memory and processor components.

Research Details

  • Spin injection using platinum waveguides as a function of field and angle down to the zero-field regime in YIG
  • Spin transport across principal directions establishes magnetic anisotropy in a structurally cubic material

Publication Details

H.Taghinejad, K. Yamakawa, X. Huang, Y. Lyu, L.P. Cairns, S. Husain, R. Ramesh, J.G. Analytis., Nano Letters (2024).

DOI: 10.1021/acs.nanolett.4c06592

Work was performed in the Lawrence Berkeley National Lab.