Synthesis, crystal structure and physical properties of europium – manganese fluoride pnictides, EuMnPnF (Pn = P, As, Sb)статья
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Дата последнего поиска статьи во внешних источниках: 20 марта 2018 г.
Аннотация:The quaternary compounds EuMnPnF (Pn = P, As, Sb) have been prepared via solid state route at 900°C, and their crystal and electronic structures as well as magnetic and transport
properties have been elucidated. These compounds belong to the widespread LaAgSO structure
type and crystallize in tetragonal (P4/nmm) unit cells with a = 4.0292(1) Å, c = 8.9505(2) Å for EuMnPF, a = 4.1227(1) Å, c = 9.0846(2) Å for EuMnAsF, and a = 4.3120(1) Å, c = 9.4356(2) Å
for EuMnSbF. At low temperatures, the magnetic response is dominated by Eu 2+ . Contrary to
previous reports, we do not observe any magnetic transitions in EuMnPF down to 2 K, whereas
its arsenide and antimonide analogs exhibit Eu 2+ ordering around 3 K. According to the electrical resistivity measurements and density-functional calculations, all three compounds are narrow-gap semiconductors.