LOW-TEMPERATURE SPECIFIC-HEAT OF MNP - EXPERIMENT AND ANALYSIS
LOW-TEMPERATURE SPECIFIC-HEAT OF MNP - EXPERIMENT AND ANALYSIS
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DOI：
10.1143/jpsj.47.531
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发表时间：
1979-01-01
影响因子：
1.7
通讯作者：
KASUYA, T
中科院分区：
文献类型：
--
作者：
TAKASE, A;YASHIMA, H;KASUYA, T
测量了1.5 ~ 8.0K范围内MnP铁磁相、螺旋相和扇形相的比热。在铁磁相，电子和声子比热从先前实验估计的磁振子比热分离。获得以下值。γ ferro= 9.65±0.5 mj/mole· deg 2和θ D= 570− 70+ 210 K。γ ferro的大值表明d电子存在于费米能级并形成能带。在螺旋相和扇形相，γ screw= 5.4 ~ 7.6mJ/mole· deg 2，γ fan= 6.9 ~ 9.1mJ/mole· deg 2，比γ ferro下降了20 ~ 30%.这与之前提出的嵌套模型是一致的。
Specific heat in ferromagnetic phase, screw phase and fan phase of MnP have been measured from 1.5 K to 8.0 K. In the ferromagnetic phase, electronic and phonon specific heat are separated from the magnon specific heat estimated from the previous experiment. The following values are obtained. γ ferro= 9.65±0.5 mj/mole· deg 2 and θ D= 570− 70+ 210 K. The large value of γ ferro suggests that the d-electrons exist at the Fermi level and form bands. In the screw and the fan phases, the γ values are evaluated to be, γ screw= 5.4∼ 7.6 mj/mole· deg 2 and γ fan= 6.9∼ 9.1 mj/mole· deg 2, decreasing by 20∼ 30% from γ ferro. This is consistent with the nesting model proposed before.