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SUMMARY:A wolf in sheep's clothing? Muon-induced magnetism in quantum spin
  ice
DTSTART;VALUE=DATE-TIME:20220828T094500Z
DTEND;VALUE=DATE-TIME:20220828T100000Z
DTSTAMP;VALUE=DATE-TIME:20220826T104751Z
UID:indico-contribution-3669@indico.stfc.ac.uk
DESCRIPTION:Speakers: Hank Wu (Oxford University)\nCompounds of the form $
 \\rm{A}_2\\rm{X}_2\\rm{O}_7$ with the pyrochlore structures can exhibit cl
 assical or quantum spin ice behaviour if the crystal field environment of 
 the $\\rm{A}\\rm{O}_8$ arrangement leads to the [111] easy-axis anisotropy
 . When Pr occupies the A-site\, there is a low-lying electronic doublet an
 d $\\rm{Pr}_2\\rm{X}_2\\rm{O}_7$ compounds are found to be quantum spin ic
 es$^1$. Pr$^{3+}$ is a non-Kramers ion and the presence of the muon can di
 stort nearby $\\rm{PrO}_8$ units and split the doublet ground states$^2$\,
  resulting in an enhancement of the Pr nuclear moment due to hyperfine cou
 pling with the electronic moments$^3$. We explore this effect using a theo
 retical model that takes account of the important interactions and compare
  our simulations with $\\mu$SR data on samples of $\\rm{Pr}_2\\rm{X}_2\\rm
 {O}_7$ (X = Sn\, Hf\, Zr) and new experimental data on $\\rm{Pr}_2\\rm{ScT
 aO}_7$\, a candidate system that simultaneously realises spin ice and char
 ge ice structures.\n\n\nReferences:\n1.	A. Princep\, *Phys. Rev. B* **88**
 \, 104421 (2013)\n2.	F. Foronda et al.\, *Phys. Rev. Lett.* **114**\, 0176
 02 (2015)\n3.	B. Bleaney\, *Physica* **69**\, 317 (1973)\n\nhttps://indico
 .stfc.ac.uk/event/53/contributions/3669/
LOCATION: Aula dei Cavalieri\, University Central Palace\, via Università
  12
URL:https://indico.stfc.ac.uk/event/53/contributions/3669/
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