ac susceptibility of the quantum critical point mimicking series Lix[Mn1.96Li0.04]O4 (x = 0.0,0.1,0.2,0.35,0.5,0.6,0.8,1.0)

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ac susceptibility of the quantum critical point mimicking series Lix[Mn1.96Li0.04]O4 (x = 0.0,0.1,0.2,0.35,0.5,0.6,0.8,1.0)

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dc.contributor.author Heitmann, Thomas
dc.contributor.author Gaddy, John
dc.contributor.author Lamsal, Jagat
dc.contributor.author Petrovic, Marcus
dc.contributor.author Montfrooij, Wouter
dc.date.accessioned 2010-08-09T14:55:19Z
dc.date.available 2010-08-09T14:55:19Z
dc.date.issued 2010-05-07
dc.identifier.citation J. Appl. Phys. 107, 09E143 (2010) en
dc.identifier.issn 0021-8979
dc.identifier.uri http://hdl.handle.net/10355/8188
dc.description doi:10.1063/1.3367976 en
dc.description.abstract The present work elucidates the series of magnetic phase transitions present in the series of spinel compounds Lix Mn1.96Li0.04 O4 x=0.0, 0.1, 0.2, 0.35, 0.5, 0.6, 0.8, 1.0 . These systems display dynamical scaling originating from the presence of magnetic clusters that form below 70 K. This scaling is similar to what has been observed in the 122 quantum critical point materials containing intrinsic disorder. We study this system using ac susceptibility in order to understand how disorder leads to fragmentation of the magnetic lattice. The Li doped system's antiferromagnetic AF ordering sets in below 70 K; however, for x=1 this ordering is limited to clusters of Mn4+ ions that are weakly coupled to each other. For the intermediate Li concentrations we observe the formation of individual spin clusters consistent with neutron scattering experiments and we find evidence for the coaligning of these clusters for T 20 K. A maximum in the peak of the susceptibility versus Li content between x=0.5 and x=0.35 indicates a crossover from a regime dominated by the cluster dynamics to one in which the long- range order of the delithiated -MnO2 phase begins to emerge. We discuss the magnetic phase diagram pertaining to short-range order in relationship to the dynamic response of these systems as measured by inelastic neutron scattering experiments. © 2010 American Institute of Physics. en
dc.description.sponsorship This research is supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Grant No. DE-FG02-07ER46381. en
dc.language.iso en_US en
dc.publisher American Institute of Physics en
dc.relation.ispartof Physics and Astronomy publications en
dc.subject antiferromagnetic materials en
dc.subject critical points en
dc.subject magnetic transitions en
dc.subject.lcsh Antiferromagnetism en
dc.subject.lcsh Lithium compounds en
dc.subject.lcsh Magnetic susceptibility en
dc.subject.lcsh Neutrons -- Diffraction en
dc.title ac susceptibility of the quantum critical point mimicking series Lix[Mn1.96Li0.04]O4 (x = 0.0,0.1,0.2,0.35,0.5,0.6,0.8,1.0) en
dc.type Article en
dc.relation.ispartofcommunity University of Missouri-Columbia. College of Arts and Sciences. Department of Physics and Astronomy


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