Scholarlink

<p>The physical properties of perovskite manganite with hexagonal structure is of interest for its additional functionalities. However, unlike LaMnO<sub>3</sub> with orthorhombic and rhombohedral phases, which has been extensively studied, LaMnO<sub>3</sub> with hexagonal structure is not typically investigated. This work systematically investigates the structure, magnetism, and transport properties of hexagonal LaMnO<sub>3</sub>. Magnetization measurements of the hexagonal LaMnO<sub>3</sub> reveal a magnetic transition with a Curie temperature (<i>T</i><sub>C</sub>) of 245&#xa0;K, distinct from the Néel temperature (<i>T</i><sub>N</sub>) ≈140&#xa0;K of orthorhombic LaMnO<sub>3</sub>. Resistivity measurements indicate a metal-insulator transition near <i>T</i><sub>C</sub>. Under a 6&#xa0;T field, the sample exhibits a negative magnetoresistance (−MR) of 56.11% at 242&#xa0;K and maintained a significant MR effect over a wide temperature range, which was attributed to the synergistic effects of spin-polarized tunneling, sample inhomogeneity, Jahn–Teller distortion, and double exchange interaction. The electrical transport behavior at high temperatures follows the variable range hopping model. The significant MR effect over a wide temperature range appears in the hexagonal LaMnO<sub>3</sub>, highlighting the potential for spintronics applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Structure, Magnetism, and Transport Properties in Hexagonal LaMnO3

  • 期刊论文

  • 发表日期：

    2025年10月23日

查看全文
  • Junran Li,
  • Haochen Wang,
  • Haiou Wang

摘要

The physical properties of perovskite manganite with hexagonal structure is of interest for its additional functionalities. However, unlike LaMnO3 with orthorhombic and rhombohedral phases, which has been extensively studied, LaMnO3 with hexagonal structure is not typically investigated. This work systematically investigates the structure, magnetism, and transport properties of hexagonal LaMnO3. Magnetization measurements of the hexagonal LaMnO3 reveal a magnetic transition with a Curie temperature (TC) of 245 K, distinct from the Néel temperature (TN) ≈140 K of orthorhombic LaMnO3. Resistivity measurements indicate a metal-insulator transition near TC. Under a 6 T field, the sample exhibits a negative magnetoresistance (−MR) of 56.11% at 242 K and maintained a significant MR effect over a wide temperature range, which was attributed to the synergistic effects of spin-polarized tunneling, sample inhomogeneity, Jahn–Teller distortion, and double exchange interaction. The electrical transport behavior at high temperatures follows the variable range hopping model. The significant MR effect over a wide temperature range appears in the hexagonal LaMnO3, highlighting the potential for spintronics applications.