Cu_3O_4面を有するA_2Cu_3O_4X_2(A=アルカリ土類金属:X=ハロゲン)の物性
スポンサーリンク
概要
- 論文の詳細を見る
First, we have studied the stability of Sr<SUB>2-x</SUB>Ba<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>4</SUB>Cl<SUB>2-y</SUB>Br<SUB>y</SUB> of the 2342 phase with the Cu<SUB>3</SUB>O<SUB>4</SUB> plane, which is composed of the Cu(1)O<SUB>2</SUB> and extra Cu(2) sublattices, in the temperature range between 600 and 950°C. It has been found that a mixture of (Sr, Ba)<SUB>2</SUB>CuO<SUB>2</SUB>(Cl, Br)<SUB>2</SUB> With the CuO<SUB>2</SUB> plane and CuO becomes stable instead of the 2342 phase with the Cu<SUB>3</SUB>O<SUB>4</SUB> plane for smaller values of x and y at low temperatures. Next, the electrical and magnetic properties of Sr<SUB>2-x</SUB>Ba<SUB>x</SUB>Cu<SUB>3</SUB>O<SUB>4</SUB>Cl<SUB>2-y</SUB>Br<SUB>y</SUB> with the Cu<SUB>3</SUB>O<SUB>4</SUB> plane have been investigated. The electrical resistivity exhibits semiconductive behavior. The magnetic susceptibility shows three-dimensional antiferromagnetic order below T<SUB>N</SUB>(1)=300-400K and T<SUB>N</SUB>(2)-30K for the Cu(1) and Cu(2) sublattices, respectively. A broad peak due to the two-dimensional antiferromagnetic order in the Cu(2) sublattice is also observed around T<SUB>N</SUB><SUP>2D</SUP>(2)=100K. With increasing x and y, the lattice parameters increase, the electrical resistivity increases and values of both T<SUB>N</SUB>(1) and T<SUB>N</SUB> <SUP>2D</SUP>(2) decrease. These results are explained as being due to the decrease of the overlaps between Cu3d and O2p, COP, Br4p orbits.
- 社団法人 粉体粉末冶金協会の論文
- 1999-09-15
著者
関連論文
- 28p-PSA-71 低次元銅酸化物Cu_5V_2O_, (Sr, Ba)_2Cu_3O_4(Cl, Br)_2の磁性
- 28a-B-6 Cu_3O_4面を有する銅酸化物A_2Cu_3O_4X_2(A=Sr, Ba;X=Cl, Br)における電気的性質と構造の安定性
- 電子レンジを用いた物質合成
- Biを含む層状塩化酸化物へのLiインターカレーション
- 電気化学的手法による層状ニオブ酸化物ACa_2Nb_3O_(A=K,Rb,Cs)へのLiインターカレーション
- Cu_3O_4面を有する銅酸化物(Sr,Ba)_2Cu_3O_4(Cl,Br)_2へのキャリアドーピング
- 23aPS-39 Cu_3O_4面を有する銅酸化物(Sr,Ba)_2Cu_3O_4(Cl,Br)_2へのキャリアドーピング
- Cu_3O_4面を有するA_2Cu_3O_4X_2(A=アルカリ土類金属:X=ハロゲン)の物性
- ペロブスカイト型水素化合物における新超伝導物質の探索
- Sr_Ca_xCu_O_のラマン散乱
- 鉛系酸化物高温超電導体のラマン散乱