A Frustrated 3-Dimensional Antiferromagnet: Stacked $J_{1}-J_{2}$ Layers
  We study a frustrated 3D antiferromagnet of stacked $J_1 - J_2$ layers. The intermediate 'quantum spin liquid' phase, present in the 2D case, narrows with increasing interlayer coupling and vanishes at a triple point. Beyond this there is a direct first-order transition from N{\' e}el to columnar order. Possible applications to real materials are discussed. 
Onofre Rojas, C. J. Hamer and J. Oitmaa
cond-mat.str-el