TY - JOUR
T1 - Lattice collapse and the magnetic phase diagram of Sr1-x Cax Co2 P2
AU - Jia, Shuang
AU - Williams, A. J.
AU - Stephens, P. W.
AU - Cava, R. J.
PY - 2009/10/6
Y1 - 2009/10/6
N2 - We report that the 122-type Sr1-x Cax Co2 P2 solid solution undergoes an anomalous structural transition from the uncollapsed to the collapsed ThCr2 Si2 structure at a distinct onset composition near x=0.5. Correlated with the structural changes, the electronic system evolves from a nearly ferromagnetic Fermi liquid to an antiferromagnetic metal, through a complex crossover regime. The structural collapse, driven by P-P bonding across the (Sr,Ca) layers, is much more pronounced in this system than it is in the analogous Fe-based system, indicating a strong sensitivity of structure to total electron count in the transition-metal pnictide 122 family.
AB - We report that the 122-type Sr1-x Cax Co2 P2 solid solution undergoes an anomalous structural transition from the uncollapsed to the collapsed ThCr2 Si2 structure at a distinct onset composition near x=0.5. Correlated with the structural changes, the electronic system evolves from a nearly ferromagnetic Fermi liquid to an antiferromagnetic metal, through a complex crossover regime. The structural collapse, driven by P-P bonding across the (Sr,Ca) layers, is much more pronounced in this system than it is in the analogous Fe-based system, indicating a strong sensitivity of structure to total electron count in the transition-metal pnictide 122 family.
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U2 - 10.1103/PhysRevB.80.165107
DO - 10.1103/PhysRevB.80.165107
M3 - Article
AN - SCOPUS:72449172128
SN - 1098-0121
VL - 80
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 16
M1 - 165107
ER -