INVESTIGATION OF ELECTRONIC PROPERTY NEAR THE METAL TO NONMETAL TRANSITION FOR Pd OXIDES

Pd 氧化物金属非金属转变附近的电子性质研究

• 批准号: 11640359
• 负责人: TSUDA Nobuo
• 金额: $ 1.22万
• 依托单位: SCIENCE UNVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640359/
• 关键词: Pd OXIDE; METAL TOINSULATOR TRANSITION; CONDUCTIVE OXIDE; KONDO EFFECT; MAGNETIC SUSCEPTIBILITY; ELECTRICAL RESISTIVITY; NEARLY ANTIFERROMAGNETIC METAL; 反強磁性的金属; パラジウム酸化物; 銅パラジウム酸化物; 金属・絶縁体転移

The logarithmic temperature dependence was found for Cu doped Ca_<1-x>Na_xPd_<3-y>Cu_yO_4 which is metallic (x > 0.3). This was analyzed by using the Hamann equation for the Kondo scattering, and TK was found to be about 8 K.The magnetic susceptibility was measured for Ca_<1-x>Na_xPd_3O_4. The susceptibility slightly increased with decreasing temperature, and it was analyzed by using the Hasegawa-Moriya theory for nearly antiferromagnetic metal. The intraatomic Coulomb repulsion was 4.9 to 3.3 eV depending on the composition.No superconductivity was found down to 2 K.

对于Cu掺杂的金属Ca_<1-x>Na_xPd_<3-y>Cu_yO_4（x &gt; 0.3），发现了对数温度关系。用Hamann方程对近藤散射进行了分析，得到TK约为8 K<1-x>。磁化率随温度的降低略有增加，并利用近反铁磁金属的Hasegawa-Moriya理论进行了分析。原子内库仑排斥为4.9 ~ 3.3eV，随组分的不同而变化，在2K以下没有发现超导电性。

项目成果

M.KANAZAWA: "Logarithmic Temperature Dependence of Resistivity for Ca_<0.7>Na_<0.3>Pd_3O_4 Doped with Cu"J.Phys.Soc.Jpn.. 69・12. 4112-4113 (2000)

M.KANAZAWA：“Ca_<0.7>Na_<0.3>Pd_3O_4 掺杂 Cu 的电阻率对数温度依赖性”J.Phys.Soc.Jpn.. 69・12 (2000)。

MASAMI KANAZAWA AND NOBUO TSUDA: "LOGARITHMIC TEMPERATURE DEPENDENCE OF RESISTIVITY FOR Ca_<0.7>Na_<0.3>Pd_3O_4 DOPED WITH Cu"J.Phys.Soc.Jpn.. Vol.69, No.12. 4112-4113 (2000)

MASAMI KANAZAWA 和 NOBUO Tsuda：“Ca_<0.7>Na_<0.3>Pd_3O_4 掺杂 Cu 的电阻率对数温度依赖性”J.Phys.Soc.Jpn.. 第 69 卷，第 12 期。

Y.YANO: "Magnetic Susceptibility of Ca_<1-x>Na_xPd_3O_4(発表予定)"J.Phys.Soc.Jpn.. (2001)

Y.YANO：“Ca_<1-x>Na_xPd_3O_4 的磁化率（待提交）”J.Phys.Soc.Jpn.. (2001)

M.KANAZAWA: "Logarithmic Temperature Dependence of Resistivity for Ca_<0.7>Na_<0.3>Pd_3O_4 Dopend with Cu"J.Phys.Soc.Jpn.. 69・12. 4112-4113 (2000)

M.KANAZAWA：“Ca_<0.7>Na_<0.3>Pd_3O_4 Dopend 与 Cu 的电阻率对数温度依赖性”J.Phys.Soc.Jpn.. 69・12 (2000)。

YUJI YANO, MASAMI KANAZAWA AND NOBUO TSUDA: "MAGNETIC SUSCEPTIBILITY OF Ca_<1-x>Na_xPd_3O_4"J.Phys.Soc.Jpn.. (TO BE PUBLISHED). (2001)

Yuji Yano、Masami Kanazawa 和 NOBUO Tsuda：“Ca_<1-x>Na_xPd_3O_4 的磁化率”J.Phys.Soc.Jpn..（待出版）。