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Title: Identification of spin wave modes in yttrium iron garnet strongly coupled to a co-axial cavity

We demonstrate, at room temperature, the strong coupling of the fundamental and non-uniform magnetostatic modes of an yttrium iron garnet ferrimagnetic sphere to the electromagnetic modes of a co-axial cavity. The well-defined field profile within the cavity yields a specific coupling strength for each magnetostatic mode. We experimentally measure the coupling strength for the different magnetostatic modes and, by calculating the expected coupling strengths, we are able to identify the modes themselves.
Authors:
;  [1] ;  [2]
  1. Microelectronics Group, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE (United Kingdom)
  2. Hitachi Cambridge Laboratory, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE (United Kingdom)
Publication Date:
OSTI Identifier:
22413042
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CAVITY RESONATORS; COUPLING; FERRIMAGNETIC MATERIALS; FERRIMAGNETISM; FERRITE GARNETS; SPHERES; SPIN WAVES; TEMPERATURE RANGE 0273-0400 K; YTTRIUM COMPOUNDS