Evidence of Development of New Spin Orders Benefiting to Enhance Magnetic Properties in Co2+-Doped Delafossite-Type Oxide CuCrO2
Evidence of Development of New Spin Orders Benefiting to Enhance Magnetic Properties in Co2+-Doped Delafossite-Type Oxide CuCrO2
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DOI：
10.1007/s10948-014-2842-3
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发表时间：
2015
影响因子：
1.8
通讯作者：
T. Elkhouni;M. Amami;P. Strobel;A. B. Salah
中科院分区：
文献类型：
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作者：
T. Elkhouni;M. Amami;P. Strobel;A. B. Salah
本文报道了高自旋Co2+掺杂cucro2delafote型氧化物对其结构和物理性能的影响。x射线衍射和拉曼光谱分析表明，所有共掺杂铬样品的结构都保持不变。该元素的加入在结构中产生各向异性微应变。测量了零场冷却磁化的温度依赖性。所有样品在24k左右都表现出AFM跃迁。高自旋态和导带交换分裂引起的位移表明，Cr 3d t2gband载流子与高自旋Co2+的t2gstate之间发生了强烈的杂化，形成了有利于提高磁化率的其他自旋序，支持了新的FM跃迁的证据。磁序和铁电序之间的耦合也被表征。
This paper reports the effect of high-spin Co2+-doped CuCrO2delafossite-type oxide on the structure and physical properties. X-ray diffraction and Raman spectroscopy show that the structure is maintained for all Co-doped samples for chromium. The incorporation of this element generates anisotropic microstrains in the structure. The temperature dependence of zero field-cooling magnetization was measured. All samples exhibit an AFM transition around 24 K. The high-spin state and the shift due to the exchange splitting of the conduction band suggest strong hybridization between carriers in the Cr 3d t2gband and the t2gstates of the high-spin Co2+to develop other spin orders benefiting to enhance magnetic susceptibility and support the evidence of new FM transition. The coupling between the magnetic order and ferroelectric order is also characterized.