A magnetic study of the one dimensional Sr3NilrO6 compound
A magnetic study of the one dimensional Sr3NilrO6 compound
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DOI：
10.1140/epjb/e2003-00283-3
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发表时间：
2003-10-01
影响因子：
1.6
通讯作者：
Broto, JM
中科院分区：
文献类型：
--
作者：
Flahaut, D;Hébert, S;Broto, JM
通过磁化率和磁化强度测量研究了多晶 Sr3NiIrO6 样品的磁性。一方面，人们发现这种由三角晶格上的磁链组成的化合物的行为与Ca3CoRhO6和Ca3CoIrO6非常相似。特别是在低温 (T < T-2 (= 21 K)) 下，会出现冻结状态，其特征是自旋动力学非常缓慢。另一方面，对于 T-2 < T < T-1 (= 70 K)，该相表现出的磁化值小于预期值，具有 1/3 平台，让人想起三角晶格上伊辛自旋的亚铁磁态。尽管如此，35 T 中不存在饱和且磁化强度值较低与 Ir4+ (S = 1/2) 和 Ni2+ (S = 1) 之间的反铁磁链内耦合一致。 Sr3NiIrO6 可以被视为由三角晶格上的反铁磁耦合的亚铁磁链组成。根据这些结果，提出了磁（H，T）相图。
The magnetic properties of a polycrystalline Sr3NiIrO6 sample have been investigated by means of susceptibility and magnetization measurements. On the one hand, it is found that this compound, made of magnetic chains on a triangular lattice, behaves very similarly to Ca3CoRhO6 and Ca3CoIrO6. In particular, at low temperature ( T < T-2 ( = 21 K)), a frozen state, characterized by a very slow spin dynamic, is evidenced. On the other hand, for T-2 < T < T-1 ( = 70 K), this phase exhibits magnetization values, smaller than the expected ones, with a 1/3 plateau reminiscent of the ferrimagnetic state of Ising spins on a triangular lattice. Nonetheless, the absence of saturation in 35 T and the low magnetization values are consistent with an antiferromagnetic intrachain coupling between Ir4+ (S = 1/2) and Ni2+ (S = 1). Sr3NiIrO6 can be viewed as made of antiferromagnetically coupled ferrimagnetic chains on a triangular lattice. On the basis of these results, a magnetic (H, T) phase diagram is proposed.