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Half-metallic ferromagnetism in cubic perovskite type NdInO3
Philosophical Magazine ( IF 1.6 ) Pub Date : 2020-06-12 , DOI: 10.1080/14786435.2020.1778203
Mohammed El Amine Monir 1
Affiliation  

ABSTRACT Based on the full-potential linearised augmented plane wave plus local orbitals (FP-L/APW + lo) method within the density functional theory (DFT), the structural, electronic, and magnetic calculations of the cubic oxide perovskite NdInO3 compound have been done under the generalised gradient approximation (GGA). The exchange and correlation (XC) potential is defined as GGA framework in the analyses of structural properties, while both GGA and GGA + U (U is the Hubbard correlation term) approximations are taken to treat the electronic and magnetic properties. It is found that ferromagnetic (FM) configuration is reported as the most stable ground state of the cubic NdInO3 material; however, the equilibrium lattice parameters such as lattice constant (a0 ), bulk modulus (B0 ), its first-pressure derivative (B’), and the minimum of total energy (E0 ) are given in paramagnetic (PM), ferromagnetic (FM), and anti-ferromagnetic (AFM) states. The spin-polarized electronic structure calculations (band structure and density of states) of the cubic oxide perovskite NdInO3 compound verify the half-metallic feature due to the spin-up case which has the metallic nature, whereas the spin-down case presents the semiconducting character. Moreover, the magnetic properties show the integer value of the total magnetic moment for the studied compound (3μB ), where it is manly contributed by Nd atoms with apparition of weak local magnetic moments in non magnetic In and O sites.

中文翻译:

立方钙钛矿型 NdInO3 中的半金属铁磁性

摘要 基于密度泛函理论 (DFT) 中的全电位线性化增强平面波加局部轨道 (FP-L/APW + lo) 方法,立方氧化物钙钛矿 NdInO3 化合物的结构、电子和磁性计算已得到在广义梯度近似(GGA)下完成。交换和相关(XC)势在结构特性分析中被定义为 GGA 框架,而 GGA 和 GGA + U(U 是哈伯德相关项)近似用于处理电子和磁特性。据报道,铁磁 (FM) 构型是立方 NdInO3 材料最稳定的基态;然而,平衡晶格参数如晶格常数 (a0 )、体积模量 (B0 )、其一阶压力导数 (B')、并且总能量的最小值 (E0) 在顺磁 (PM)、铁磁 (FM) 和反铁磁 (AFM) 状态下给出。立方氧化物钙钛矿 NdInO3 化合物的自旋极化电子结构计算(能带结构和态密度)验证了由于具有金属性质的自旋情况导致的半金属特征,而自旋向下情况则呈现半导体特点。此外,磁性显示所研究化合物的总磁矩的整数值(3μB ),其中主要由 Nd 原子贡献,在非磁性 In 和 O 位点出现弱局部磁矩。立方氧化物钙钛矿 NdInO3 化合物的自旋极化电子结构计算(能带结构和态密度)验证了半金属特征,这是由于具有金属性质的自旋情况,而自旋向下情况则呈现半导体特点。此外,磁性显示所研究化合物的总磁矩的整数值(3μB ),其中主要由 Nd 原子贡献,在非磁性 In 和 O 位点出现弱局部磁矩。立方氧化物钙钛矿 NdInO3 化合物的自旋极化电子结构计算(能带结构和态密度)验证了由于具有金属性质的自旋情况导致的半金属特征,而自旋向下情况则呈现半导体特点。此外,磁性显示所研究化合物的总磁矩的整数值(3μB ),其中主要由 Nd 原子贡献,在非磁性 In 和 O 位点出现弱局部磁矩。
更新日期:2020-06-12
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