Magnetic and quadrupolar properties of PrPb3
Magnetic and quadrupolar properties of PrPb3
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PrPb3 的磁性和四极特性
DOI：
10.1016/0304-8853(82)90206-2
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发表时间：
1982
影响因子：
2.7
通讯作者：
É. D. Lacheisserie
中科院分区：
文献类型：
--
作者：
P. Morin;D. Schmitt;É. D. Lacheisserie
立方稀土金属间化合物PrPb3(AuCu3型结构)在0.35K发生相变：由于它是Van Vleck顺磁体，因此认为低温相是四极有序的。为了说明这种可能性，我们首先用比热和一阶磁化率的结果讨论了立方能级格式，然后我们用准伸缩和三阶磁化率的方法研究了立方顺磁相中的两个对称性下降模(四方和三角)。对于四方对称性，四极对相互作用表现为负相互作用，主导了磁弹性耦合；因此，低温有序可能是反铁四极有序，这是稀土金属间化合物中的一种新情况，TmZn和TmCd有序是铁四极有序。
The cubic rare earth intermetallic compound PrPb3(AuCu3-type structure) undergoes a transition at 0.35 K: as it is a Van Vleck paramagnet, the low temperature phase was assumed to be quadrupolarly ordered. In order to specify this possibility, we first discuss the cubic level scheme using specific heat and first-order magnetic susceptibility results; afterwards we present an extensive study of the two (tetragonal and trigonal) symmetry lowering modes, investigated in the cubic paramagnetic phase by means of parastriction and third-order magnetic susceptibility. For the tetragonal symmetry, the quadrupolar pair interactions appear as negative, dominating the magnetoelastic coupling; as a result, the low temperature ordering may be antiferroquadrupolar, a new situation among rare earth intermetallics, the TmZn and TmCd ordering being ferroquadrupolar.