First-order phase transitions in EuCo{sub 2}P{sub 2} and SrNi{sub 2}P{sub 2}

Journal Article · Sun Nov 30 23:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.13796· OSTI ID:550513

Huhnt, C; Schlabitz, W ^[1]; Wurth, A; Mewis, A ^[2]; Reehuis, M ^[3]

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1. II. Physikalisches Institut, Universitaet zu Koeln, Zuelpicher Strasse 77, D-50937 Koeln (Germany)
2. Institut fuer Anorganische Chemie und Strukturchemie der Heinrich-Heine-Universitaet, Universitaetsstrasse 1, D-40225 Duesseldorf (Germany)
3. Hahn-Meitner Institut, Glienicker Strasse 100, D-10419 Berlin (Germany)

First-order phase transitions with strong and extremely anisotropic changes of the lattice parameters were observed in the ThCr{sub 2}Si{sub 2} structure-type compounds EuCo{sub 2}P{sub 2} and SrNi{sub 2}P{sub 2}. At room temperature, with increasing pressure the phase transition occurs in SrNi{sub 2}P{sub 2} at 4 kbar and in EuCo{sub 2}P{sub 2} at 30 kbar which is in the latter probably accompanied by a valence change of Eu. On the basis of single-crystal data of ACo{sub 2}P{sub 2} (A = Ca, Sr, La, Ce, Pr, Nd, Eu) at ambient pressure and temperature we discuss the pressure dependence of the bond lengths in these compounds. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 550513
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 56; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BOND LENGTHS
COBALT PHOSPHIDES
CRYSTAL-PHASE TRANSFORMATIONS
EUROPIUM PHOSPHIDES
NICKEL PHOSPHIDES
STRONTIUM COMPOUNDS