Spin Correlations on a Site Diluted Square Lattice Heisenberg Antiferromagnet Covering the Percolation Threshold

Kazuyoshi Takeda, Osamu Fujita, Masaki Mito, Tatsuya Kawae, Masako Hitaka, Hiroyuki Deguchi, Yoshinori Muraoka, Kazuo Yamagata

Research output: Contribution to journalArticlepeer-review

Abstract

The reduction of the magnetic ordering temperature has been studied in the quasi-two-dimensional square lattice Heisenberg magnet, Mn(HCOO) 2 2(NH 2) 2 CO(T N (1)=3.77 K) with the spin value S =5/2, randomly diluted with non-magnetic Cd 2+ ions. It is found that, as the dilution proceeds, the Neel temperature T N (x) goes down toward 0 K around at x =0.65, higher than x p =0.59 for the square lattice, making the contrast to the cases of the diluted Ising system and La 2 CuO 4, a high Tc superconducting parent compound with S =1/2: The critical index φ in T N (x)∼(x − x p) 1/φ is suggested φ<1 for the Heisenberg and φ>1 for the Ising systems.

Original languageEnglish
Pages (from-to)315-320
Number of pages6
JournalMolecular Crystals and Liquid Crystals
Volume376
Issue number1
DOIs
Publication statusPublished - 2002

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Spin Correlations on a Site Diluted Square Lattice Heisenberg Antiferromagnet Covering the Percolation Threshold'. Together they form a unique fingerprint.

Cite this