Making and Breaking Covalent Bonds across the Magnetic Transition in the Giant Magnetocaloric Material Gd5(Si2Ge2)Physical Review Letters
Publication VersionPublished Version
AbstractA temperature-dependent, single crystal x-ray diffraction study of the giant magnetocaloric material, Gd5(Si2Ge2), across its Curie temperature (276 K) reveals that the simultaneous orthorhombic to monoclinic transition occurs by a shear mechanism in which the (Si,Ge)−(Si,Ge) dimers that are richer in Ge increase their distances by 0.859(3) Å and lead to twinning. The structural transition changes the electronic structure, and provides an atomic-level model for the change in magnetic behavior with temperature in the Gd5(SixGe1−x)4.
Copyright OwnerAmerican Physical Society
Citation InformationWonyoung Choe, Vitalij K. Pecharsky, Alexandra O. Pecharsky, Karl A. Gschneidner, et al.. "Making and Breaking Covalent Bonds across the Magnetic Transition in the Giant Magnetocaloric Material Gd5(Si2Ge2)" Physical Review Letters Vol. 84 Iss. 20 (2000) p. 1 - 4
Available at: http://works.bepress.com/gordon-miller/64/