title: Finite magnetization plateau from a two-dimensional antiferromagnet: density functional analysis of the magnetic structure of Cu3(P2O6OH)2.
abstract: We evaluated the intrachain and interchain spin exchanges of Cu(3)(P(2)O(6)OH) consisting of (Cu2-Cu2-Cu1)(∞) chains by density functional calculations to find that the magnetic properties of Cu(3)(P(2)O(6)OH)(2) are not governed by the J(1)-J(2)-J(2) trimer chain along the c-direction, but by a two-dimensional (2D) antiferromagnetic lattice in which J(1)-J(3)-J(3) trimer chains along the (a-c/2)-direction are interconnected by J(6) monomer chains along the a-direction. Despite its 2D character, Cu(3)(P(2)O(6)OH)(2) shows a 1/3 magnetization plateau because it is a spin-1/2 trimer system with one dominant antiferromagnetic dimer exchange.
authors.affiliation: Department of Chemistry and Research Institute of Basic Science, Kyung Hee University, Seoul 130-701, Republic of Korea.
authors.forename: Hyun-Joo
authors.initials: HJ
authors.lastname: Koo
authors.forename: Myung-Hwan
authors.initials: MH
authors.lastname: Whangbo