Mahnetic and Electric Properties of Double Perovskites containing Rare-earth and Platinum Elements

含稀土和铂元素的双钙钛矿的磁电性能

• 批准号: 18550049
• 负责人: HINATSU Yukio
• 金额: $ 2.68万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18550049/
• 关键词: Rare earth; Platinum element; Perovskite; Magnetic properties; Magnetic susceptibility; Specific heat; Magnetic ordering; Magnetic frustration; 希土類; 遷移金属; 酸化物; 螢石型構造; 反強磁性転移

Magnetic properties of double perovskites Ca_2LnRuO_6 (Ln = Y, La-Lu) were investigated. From the magnetic susceptibility and specific heat measurements, it is found that all these compounds show an antiferromagnetic transition (T_N = 10-34K), and that the antiferromagnetic ordering of Ru^<+5> ions occurs below these temperatures. In these compounds, the larger Ln ions tend to occupy the A site of the perovskite ABO_3, while the smaller Ln ions tend to occupy the B site. The Nd ions in Ca_2NdRuO_6 are situated at the A site and show an antiferromagnetic transition at 1.6 K, which is much lower than T_N = 11.5 K. On the other hand, the Yb ions in Ca_2YbRuO_6 are situated at the B site, and a long-range antiferromagnetic ordering due to both Yb^<3+> and Ru^<5+> ions occurs at 34 K. The magnetic structure of Ca_2YbRuO_6 was determined by powder neutron diffraction measurements.In addition, ternary potassium rare earth oxides KLnO_2 (Ln = Y, Nd, Sm-Lu) have been determined by powder X-ray diffraction using the Rietveld analysis method. All of the KLnO_2 compounds have the same hexagonal a-NaFeO_2 structure. Magnetic susceptibility measurements for these compounds show paramagnetic behavior down to 1.8 K. The specific heat measurements indicate that the Gd, Dy, Ho and Er compounds have a magnetic anomaly at 1.1, 1.8, 1.2 and 0.8 K, respectively.

研究了双钙晶CA_2LNRUO_6（LN = Y，LA-LU）的磁性特性。从磁化率和特定的热量测量值中，可以发现所有这些化合物都显示出抗磁性转变（T_N = 10-34K），并且Ru^<+5>离子的抗磁磁有序发生在这些温度以下。在这些化合物中，较大的LN离子倾向于占据钙钛矿ABO_3的A位点，而较小的LN离子倾向于占据B位点。 Ca_2nDruO_6中的ND离子位于A站点，显示出1.6 K的防铁磁过渡，远低于T_N = 11.5 K.，另一方面，Ca_2ybruo_6中的Yb离子位于B位置，以及在B位置和长期抗fiferromagnetic at the yb^3+yb^3+<3+<3+<3+<3+<3+ 34 K.通过粉末中子衍射测量测量结果确定Ca_2ybruo_6的磁结构。在另外，使用Rietveld分析方法，通过粉末X射线衍射法确定了三钾稀土氧化物KLNO_2（Ln = Y，ND，SM-LU）。所有的KLNO_2化合物都具有相同的Hexagonal A-NaFeo_2结构。这些化合物的磁敏感性测量值显示出副磁性行为降至1.8K。特定的热量测量值表明，GD，DY，HO和ER化合物分别在1.1、1.8、1.2和0.8 K时具有磁异常。

项目成果

A pSR Study of the Phase Transition in the Double Perovskites Ba_2PrRu_<1-x>Ir_xO_6

双钙钛矿 Ba_2PrRu_<1-x>Ir_xO_6 相变的 pSR 研究

• 发表时间: 2007
• 期刊: Journal of Magnetism and Magnetic Materials 310
• 作者: B. Don;Y. Doi;and Y. Hinatsu;B. Don;H. Nishimine;A.D. Hillier
• 通讯作者: A.D. Hillier

Structure and Magnetic Properties of Ternary Potassium Lanthanide Oxides KLnO_2(Ln=Y, La, Nd, Sm-Lu)

三元镧系钾氧化物KLnO_2(Ln=Y、La、Nd、Sm-Lu)的结构与磁性能

• 发表时间: 2008
• 期刊: J. Alloys and Compounds 453
• 作者: B. Don;Y. Doi;and Y. Hinatsu;B. Don
• 通讯作者: B. Don

Crystal Structures and Magnetic Properties of Double Perovskites Compounds Ca_2LnRuO_6 (Ln=Y, La-Lu)

双钙钛矿化合物Ca_2LnRuO_6 (Ln=Y, La-Lu)的晶体结构和磁性能

• 发表时间: 2006
• 期刊: J. Alloys and Compounds 408-412
• 作者: A.D. Hillier;D.T. Adroja;W Kockelmann;M. Wakeshima;Y Izumiyama;Y. Hinatsu;D. Visser;and B.D. Rainford;H. Nishimine;A. D. Hillier;K. Matsuhira;M.Wakeshima;T.Sakamoto;C.Sakai
• 通讯作者: C.Sakai

Phase Transition of Ln_3IrO_7(Ln=Pr,Nd,Sm,Eu)and its Low Temperature Structure

Ln_3IrO_7(Ln=Pr,Nd,Sm,Eu)的相变及其低温结构

• 发表时间: 2007
• 期刊: J. Ceramic Society of Japan 115
• 作者: B. Don;Y. Doi;and Y. Hinatsu;B. Don;H. Nishimine
• 通讯作者: H. Nishimine

Structure and Magnetic Properties of Ternary Potassium Lanthanide Oxides KLnO_2 (Ln=Y, La, Nd, Sm-Lu)

三元镧系钾氧化物KLnO_2（Ln=Y、La、Nd、Sm-Lu）的结构与磁性能

• 发表时间: 2008
• 期刊: J. Alloys and Compounds 453
• 作者: B. Don;Y. Doi;and Y. Hinatsu
• 通讯作者: and Y. Hinatsu