Magnetic Transitions in Cubic Spinels
Magnetic Transitions in Cubic Spinels
复制标题
立方尖晶石的磁转变
DOI：
10.1063/1.1728636
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发表时间：
1962
期刊：
影响因子：
--
通讯作者：
K. Dwight
中科院分区：
文献类型：
--
作者：
N. Menyuk;A. Wold;D. B. Rogers;K. Dwight
在4.2°K至居里点之间，测定了立方尖晶石MnCr_2O_4、CoCr_2O_4、MnV_2O_4和CoV_2O_4的磁化曲线。除了MnV2O4之外，所有曲线都表明在该温度范围内存在磁转变。虽然所有这些材料已被报道为正常尖晶石，我们的结果和最近的理论之间的不一致的自旋配置在正常立方尖晶石导致进一步的实验，建立CoV2O4是不是，在一般情况下，normal.Theory建议存在两种类型的过渡MnCr2O4和CoCr2O4，但只有一个已观察到在每种情况下。这些材料的磁化曲线中观察到的断裂发生的温度可以通过将它们归因于不同类型的转变来解释。MnCr2O4磁化曲线的解释与Corliss和Hastings的中子衍射结果是一致的。
Magnetization curves of the cubic spinels MnCr2O4, CoCr2O4, MnV2O4, and CoV2O4 have been obtained between 4.2°K and their Curie points. With the possible exception of MnV2O4, all the curves indicate the presence of a magnetic transition within this temperature range. Although all these materials have been reported to be normal spinels, inconsistencies between our results and the recent theory of spin configurations in normal cubic spinels led to further experiments which established that CoV2O4 is not, in general, normal.Theory suggests the presence of two types of transition in MnCr2O4 and CoCr2O4, but only one has been observed in each case. The temperatures at which the observed break in the magnetization curves of these materials occurs can be interpreted by ascribing them to different types of transitions. The interpretation of the MnCr2O4 magnetization curve is compatible with the neutron diffraction results of Corliss and Hastings.