The reduction of the magnetic ordering temperature has been studied in the quasi-two-dimensional square lattice Heisenberg magnet, Mn(HCOO) 22(NH2)2CO(TN(1)=3.77 K) with the spin value 5=5/2, randomly diluted with non-magnetic Cd2+ ions. It is found that, as the dilution proceeds, the Neel temperature TN(x) goes down toward 0 K around at x=0.65, higher than xp =0.59 for the square lattice, making the contrast to the cases of the diluted Ising system and La2CuO4, a high Tc superconducting parent compound with 5=1/2: The critical index φ in TN(X)∼(x-xp)1/φ is suggested φ<1 for the Heisenberg and φ>1 for the Ising systems.
|ジャーナル||Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals|
|出版ステータス||出版済み - 2002|
|イベント||Proceedings of the Interdisciplinary Symposium on Multifunctionality of Inorganic , Organic, and Their Hybrid Solids - Honolulu, HI, 米国|
継続期間: 12 15 2000 → 12 18 2000
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics