Long-range magnetic ordering of quasi-one-dimensional S=1/2 Heisenberg antiferromagnet Sr2Cu(PO4)2

✍ Scribed by Alexei A. Belik; Shinya Uji; Taichi Terashima; Eiji Takayama-Muromachi

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 949 KB
• Volume: 178
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2005.08.030

✦ Synopsis

Magnetic properties of quasi-one-dimensional S ¼ 1=2 Heisenberg antiferromagnet Sr 2 Cu(PO 4 ) 2 were investigated by temperature and field dependence of AC susceptibility down to 0.03 K. A sharp peak was observed at T N ¼ 0:085 K on the temperature dependence of AC susceptibility indicating long-range magnetic ordering. Taking into account the exchange constant, J=k B ¼ 143 K (Hamiltonian

), the ratio k B T N /J is 0.06%. Sr 2 Cu(PO 4 ) 2 is, therefore, one of the best one-dimensional Heisenberg antiferromagnet known so far.