1 / 2

Education and Mentoring Undergraduate Participation: -Matt Broda (Summer, 2008)

Structural Chemistry and Magnetic Properties of RE 2 [Sn x Ge 1-x ] 5 (RE = Nd, Sm) and RE[Sn x Ge 1-x ] 2 (RE = Gd, Tb): Four New Rare-Earth Metal Intermetallic Compounds with Germanium Zig-Zag Chains and Tin Square-Nets Svilen Bobev, University of Delaware, DMR 0743916.

leon
Download Presentation

Education and Mentoring Undergraduate Participation: -Matt Broda (Summer, 2008)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Structural Chemistry and Magnetic Properties of RE2[SnxGe1-x]5 (RE = Nd, Sm) and RE[SnxGe1-x]2 (RE = Gd, Tb): Four New Rare-Earth Metal Intermetallic Compounds with Germanium Zig-Zag Chains and Tin Square-NetsSvilen Bobev, University of Delaware, DMR 0743916 The structures of I and II are closely “rooted” from one ubiquitous structure type, CrB, which exemplifies the [Ge2] zig-zag chains seen here and in other REGe monogermanides. As we schematically illustrate in the figure to the right, many more structures, including those of another common type, ZrSi2, can be “designed” by a simple “cut-and-paste” approach, where orthogonal chains or square sheets are inserted between the depicted zig-zag fragments. Starting with a CrB-like REGe monogermanide for example, and following this formalism, the simplest structure to build is that of REGe2, where every other [Ge2] chain is replaced by a square sheet, [Ge], leading to doubling of the stacking sequence and an arrangement of the ZrSi2-type. If every other [Ge2] chain is replaced by not one, but two square sheets that come in contact, i.e. double-square nets [Ge2], this will lead to an arrangement analogous to that in the DyGe3-type. Further “fine-tuning” of the latter structures by replacing every other [Ge]-single or [Ge2]-double square sheet with different [Ge2] chains, will lead again to doubling of the stacking sequence and structural arrangements analogous to those in I and II, respectively. Tobash, P.H.; Bobev, S.; J. Alloys Compds.2008, submitted 05/16/08

  2. Structural Chemistry and Magnetic Properties of RE2[SnxGe1-x]5 (RE = Nd, Sm) and RE[SnxGe1-x]2 (RE = Gd, Tb): Four New Rare-Earth Metal Intermetallic Compounds with Germanium Zig-Zag Chains and Tin Square-NetsSvilen Bobev, University of Delaware, DMR 0743916 HIGHLIGHTS from 15-Ferbruary-2008 – 1-August-2008 Dissemination of the results A talk and a poster have been presented at the 25th Rare-earth research conference, held at the University of Alabama (June 22-26, 2008). Two papers have been submitted for publication. Undergraduate students will present their results at the upcoming campus-wide Undergraduate research symposium - August 13, 2008. Education and Mentoring Undergraduate Participation: -Matt Broda (Summer, 2008) -Benn Hmiel (Summer, 2008) Graduate Participation: Paul H. Tobash Graduate Recruiting: -William Green (Summer, 2008) -AJ Anthonelli (Summer, 2008)

More Related