Synthesis, crystal structure, transport, and magnetic properties of novel ternary copper phosphides, A 2Cu 6P 5 (A = Sr, Eu) and EuCu 4P 3

Dmitri O. Charkin, Arthur V. Urmanov, Sergey M. Kazakov, Dmitri Batuk, Artem M. Abakumov, Stephan Knöner, Elena Gati, Bernd Wolf, Michael Lang, Andrey V. Shevelkov, Gustaaf Van Tendeloo, Evgeni V. Antipov

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14 Citations (Scopus)

Abstract

Three new ternary copper phosphides, Sr 2Cu 6P 5, Eu 2Cu 6P 5, and EuCu 4P 3, have been synthesized from the elements in evacuated silica capsules. Eu 2Cu 6P 5 and Sr 2Cu 6P 5 adopt the Ca 2Cu 6P 5-type structure, while EuCu 4P 3 is isostructural to BaMg 4Si 3 and still remains the only representative of this structure type among the ternary Cu pnictides. All three materials show metallic conductivity in the temperature range 2 K T 290 K, with no indication for superconductivity. For Eu 2Cu 6P 5 and EuCu 4P 3, long-range magnetic order was observed, governed by 4f local moments on the Eu atoms with predominant ferromagnetic interactions. While Eu 2Cu 6P 5 shows a single ferromagnetic transition at T C = 34 K, the magnetic behavior of EuCu 4P 3 is more complex, giving rise to three consecutive magnetic phase transitions at 70, 43, and 18 K.

Original languageEnglish
Pages (from-to)8948-8955
Number of pages8
JournalInorganic Chemistry
Volume51
Issue number16
DOIs
Publication statusPublished - 20 Aug 2012
Externally publishedYes

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