Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-01-09
Phys. Rev. B, 77, 092402 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures, 2 tables
Scientific paper
10.1103/PhysRevB.77.092402
We report on the magnetic properties of the layered perovskite PbVO(3). The results of magnetic susceptibility and specific heat measurements as well as band structure calculations consistently suggest that the S=1/2 square lattice of vanadium atoms in PbVO(3) is strongly frustrated due to next-nearest-neighbor antiferromagnetic interactions. The ratio of next-nearest-neighbor (J(2)) to nearest-neighbor (J(1)) exchange integrals is estimated to be J(2)/J(1)\approx 0.2-0.4. Thus, PbVO(3) is within or close to the critical region of the J(1)-J(2) frustrated square lattice. Supporting this, no sign of long-range magnetic ordering was found down to 1.8 K.
Antipov Evgeny V.
Belik Alexei A.
Rosner Helge
Shpanchenko Roman V.
Takayama-Muromachi Eiji
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