Scanning tunneling spectroscopy under pulsed spin injection Journal Articles uri icon

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abstract

  • An experimental technique combining cryogenic scanning tunneling spectroscopy (STS) and pulsed quasiparticle spin injection has been developed. The spin injection is intended to perturb a superconducting thin film from spin equilibrium, while the STS monitors its steady-state quasiparticle spectrum. A pulsed injection circuit was designed to minimize Joule heating while being both synchronized with and decoupled from the STS circuitry. A detailed description of the technique is presented, along with its application to spin-injection heterostructures comprising the half-metallic ferromagnet La0.7Ca0.3MnO3 and the high-Tc superconductor YBa2Cu3O7−δ.

authors

  • Ngai, J
  • Tseng, Yu-Chih
  • Morales, P
  • Pribiag, V
  • Wei, JYT
  • Chen, F
  • Perovic, DD

publication date

  • March 15, 2004