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SUMMARY:Quantum spin liquid behavior in geometrically frustrated Mo pyroch
 lore antiferromagnet Lu$_2$Mo$_2$O$_{5-y}$N$_2$
DTSTART;VALUE=DATE-TIME:20220831T104000Z
DTEND;VALUE=DATE-TIME:20220831T110000Z
DTSTAMP;VALUE=DATE-TIME:20220826T121430Z
UID:indico-contribution-3739@indico.stfc.ac.uk
DESCRIPTION:Speakers: Sourav K. Dey (IMSS\, KEK)\, Ryosuke Kadono (IMSS\, 
 KEK)\nThe magnetic ground state of a quantum spin liquid (QSL) candidate c
 ompound\, Lu$_2$Mo$_2$O$_{5-y}$N$_2$ oxynitride pyrochlore ($S=1/2$\, Mo$^
 {5+}$)\, was investigated by muon spin rotation/relaxation experiment.  In
  contrast to Lu$_2$Mo$_2$O$_7$ ($S=1$\, Mo$^{4+}$) which exhibits a spin g
 lass-like freezing of Mo moments below $T_g\\simeq16$ K\, no such spin fre
 ezing or long range magnetic order was observed down to 0.3 K. More intere
 stingly\, two distinct magnetic domains discerned by spin dynamics were ob
 served below $\\sim$13 K\; one showing the ``sporadic'' spin fluctuation s
 imilar to that observed in other QSL candidate compounds including the kag
 ome antiferromagnets\, and the other showing the fast paramagnetic fluctua
 tion that is only weakly suppressed with decreasing temperature.   Their o
 rigins are discussed in terms of the bond randomness induced by the partia
 l substitution of O with N and the inhomogeneous Mo valency due to O defic
 iency ($y>0$) [1].\n\nReferences\n[1] S. K. Day *et al.*\, arXiv:2206.1304
 9.\n\nhttps://indico.stfc.ac.uk/event/53/contributions/3739/
LOCATION:Science and Technology Campus\, University of Parma
URL:https://indico.stfc.ac.uk/event/53/contributions/3739/
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