Evidence of dilute ferromagnetism in rare-earth doped yttrium aluminium garnet

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)
    232 Downloads (Pure)


    © 2015 AIP Publishing LLC. This work demonstrates strong coupling regime between an erbium ion spin ensemble and microwave hybrid cavity-whispering gallery modes in a yttrium aluminium garnet dielectric crystal. Coupling strengths of 220 MHz and mode quality factors in excess of 106 are demonstrated. Moreover, the magnetic response of high-Q modes demonstrates behaviour which is unusual for paramagnetic systems. This behaviour includes hysteresis and memory effects. Such qualitative change of the system's magnetic field response is interpreted as a phase transition of rare earth ion impurities. This phenomenon is similar to the phenomenon of dilute ferromagnetism in semiconductors. The clear temperature dependence of the phenomenon is demonstrated.
    Original languageEnglish
    Pages (from-to)122401-1 - 122401-5
    JournalApplied Physics Letters
    Issue number12
    Publication statusPublished - 21 Sep 2015


    Dive into the research topics of 'Evidence of dilute ferromagnetism in rare-earth doped yttrium aluminium garnet'. Together they form a unique fingerprint.

    Cite this