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Thermal expansion of RFeAsO (R=La,Ce,Pr,Sm,Gd) | | R. Klingeler
; L. Wang
; U. Kohler
; G. Behr
; C. Hess
; B. Buchner
; | | Date: |
22 Sep 2009 | | Abstract: | We present measurements of the thermal expansion coefficient $alpha$ of
polycrystalline RFeAsO (R = La,Ce,Pr,Sm,Gd). Anomalies at the magnetic ordering
transitions indicate a significant magneto-elastic coupling and a negative
pressure dependence of $T_{
m N}$ . The structural transitions are associated
by large anomalies in $alpha$. Rare earth magnetic ordering in CeFeAsO,
PrFeAsO, and SmFeAsO yields large positive anomalies at low temperatures. | | Source: | arXiv, 0909.3998 | | Services: | Forum | Review | PDF | Favorites | |
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