Prefer a chat interface with context about you and your work?
Frustrated spin-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mo>โ</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:math>square lattice in the layered perovskite<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Pb</mml:mi><mml:mi mathvariant="normal">V</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
We report on the magnetic properties of the layered perovskite $\mathrm{Pb}\mathrm{V}{\mathrm{O}}_{3}$. The results of magnetic susceptibility and specific heat measurements as well as band-structure calculations consistently suggest that the $S=1โ2$ square lattice of vanadium atoms in $\mathrm{Pb}\mathrm{V}{\mathrm{O}}_{3}$ is strongly frustrated due to next-nearest-neighbor antiferromagnetic interactions. The ratio of next-nearest-neighbor $({J}_{2})$ โฆ