Specific heat at low temperatures and magnetic measurements in Nd 0.5 Sr 0.5 MnO 3 and R 0.5 Ca 0.5 MnO 3 (cid:132) R ˜ Nd, Sm, Dy, and Ho (cid:133) samples
Specific heat at low temperatures and magnetic measurements in Nd 0.5 Sr 0.5 MnO 3 and R 0.5 Ca 0.5 MnO 3 (cid:132) R ˜ Nd, Sm, Dy, and Ho (cid:133) samples
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Nd 0.5 Sr 0.5 MnO 3 和 R 0.5 Ca 0.5 MnO 3 (cid:132) R ∼ Nd、Sm、Dy 和 Ho (cid:133) 样品的低温比热和磁性测量
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通讯作者：
D. Else
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作者：
W. Craft;L. Ding;D. Prasad;L. Partridge;D. Else
研究了Nd0.5Sr0.5MnO3、Nd0.5Ca0.5MnO3、Sm0.5Ca0.5MnO3、Dy0.5Ca0.5MnO3和Ho0.5Ca0.5MnO3化合物的磁化强度与温度和磁fi的关系。样品中的铁磁性、反铁磁性和电荷有序转变与以前的报道一致。我们还在0到9T和2到30K的温度范围内对所有fiVe样品进行了特殊的fi磁场c-热测量。在10K以下，所有样品的fic热谱测量都证明了肖特基反常。然而，我们不能成功地将曲线fit到两个能级或两个能级肖特基反常的分布。
We studied the magnetization as a function of temperature and magnetic field in the compounds Nd 0.5 Sr 0.5 MnO 3 , Nd 0.5 Ca 0.5 MnO 3 , Sm 0.5 Ca 0.5 MnO 3 , Dy 0.5 Ca 0.5 MnO 3 , and Ho 0.5 Ca 0.5 MnO 3 . Ferromagnetic, antiferromagnetic, and charge ordering transition in our samples agreed with previous reports. We also did specific-heat measurements with applied magnetic fields between 0 and 9 T and temperatures between 2 and 30 K in all five samples. Below 10 K the specific-heat measurements evidenced a Schottky-like anomaly for all samples. However, we could not successfully fit the curves to either a two level or a distribution of two-level-Schottky anomaly.