Premium
The Solid Solution Eu 1 – x Sr x AuIn
Author(s) -
Klenner Steffen,
Bönnighausen Judith,
Pöttgen Rainer
Publication year - 2021
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202000259
Subject(s) - europium , antiferromagnetism , solid solution , crystallography , hyperfine structure , tantalum , ferromagnetism , materials science , crystal structure , analytical chemistry (journal) , chemistry , condensed matter physics , luminescence , atomic physics , physics , metallurgy , optoelectronics , chromatography
EuAuIn and SrAuIn (TiNiSi type structure, space group Pnma ) form a complete solid solution Eu 1– x Sr x AuIn. Samples with x = 0.2, 0.4, 0.5, 0.6 and 0.8 were prepared by melting of the elements in sealed tantalum ampoules followed by slow cooling. The samples were characterized through Guinier powder patterns. The X‐ray data confirm Vegard type behavior. The crystal structures of Eu 0.8 Sr 0.2 AuIn and Eu 0.5 Sr 0.5 Au 1.02 In 0.98 were refined from single‐crystal X‐ray diffraction data in order to confirm the Eu/Sr site occupancies. Temperature‐dependent magnetic susceptibility data confirm divalent europium. The Néel temperature linearly drops from 21.0 K for EuAuIn and long‐range magnetic ordering is still present in the x = 0.8 sample with T N = 4.1 K. Low‐field measurements indicate two successive magnetic ordering temperatures for all samples, resulting from a complex interplay of antiferromagnetic and ferromagnetic interactions, similar to the tetrelides EuMg X ( X = Si, Ge, Sn). 151 Eu Mössbauer spectra confirm the divalent ground state and show complex magnetic hyperfine field splitting at 6 K.