Heat Capacity and Magnetic Phase Diagram of the Low-Dimensional Antiferromagnet Y$_2$BaCuO$_5$

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dc.creatorKnafo, W.
dc.creatorMeingast, C.
dc.creatorInaba, A.
dc.creatorWolf, Th.
dc.creatorLöhneysen, H. v.
dc.date2008-01-28
dc.date2008-07-28
dc.date.accessioned2026-07-07T09:52:45Z
dc.date.available2026-07-07T09:52:45Z
dc.descriptionA study by specific heat of a polycrystalline sample of the low-dimensional magnetic system Y$_2$BaCuO$_5$ is presented. Magnetic fields up to 14 T are applied and permit to extract the ($T$,$H$) phase diagram. Below $μ_0H^*\simeq2$ T, the Néel temperature, associated with a three-dimensional antiferromagnetic long-range ordering, is constant and equals $T_N=15.6$ K. Above $H^*$, $T_N$ increases linearly with $H$ and a field-induced increase of the entropy at $T_N$ is related to the presence of an isosbestic point at $T_X\simeq20$ K, where all the specific heat curves cross. A comparison is made between Y$_2$BaCuO$_5$ and the quasi-two-dimensional magnetic systems BaNi$_{2}$V$_{2}$O$_{8}$, Sr$_2$CuO$_2$Cl$_2$, and Pr$_2$CuO$_4$, for which very similar phase diagrams have been reported. An effective field-induced magnetic anisotropy is proposed to explain these phase diagrams.
dc.description14 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/0801.4318
dc.identifierhttp://arxiv.org/abs/0801.4318
dc.identifierJ. Phys.: Condens. Matter 20, 335208 (2008)
dc.identifierdoi:10.1088/0953-8984/20/33/335208
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/165706
dc.subjectStrongly Correlated Electrons
dc.titleHeat Capacity and Magnetic Phase Diagram of the Low-Dimensional Antiferromagnet Y$_2$BaCuO$_5$
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