Scholarlink

<p>We present a comprehensive investigation of the structural, magnetic, and magnetotransport properties of hexagonal BaMnO<sub>3</sub>, with particular emphasis on its temperature coefficient of resistance (TCR) and low-field magnetoresistance (LFMR). The X-ray diffraction (XRD) pattern confirms the single-phase 15R-type hexagonal structure (space group <i>R-3&#xa0;m</i>) of the BaMnO<sub>3</sub>. The particles of BaMnO<sub>3</sub> compound are evenly distributed, that can be proved by the scanning electron microscope (SEM). The energy dispersive spectrometer (EDS) reveals a Ba:Mn:O&#xa0;stoichiometric ratio of 20.24:20.55:59.21, consistent with the nominal composition. Magnetic characterization reveals a spin glass state below 50&#xa0;K arising from competing ferromagnetic (FM) and antiferromagnetic (AFM) interactions. Remarkably, this AFM insulator exhibits significant low-field magnetoresistance (LFMR = 16.5% at µ<sub>0</sub>H = 1&#xa0;T) and good TCR values, reaching −6.1% K<sup>−1</sup> at temperature of 220&#xa0;K and −3.2% K<sup>−1</sup> at room temperature. These findings demonstrate BaMnO<sub>3</sub> potential for antiferromagnetic spintronic applications, particularly in magnetic sensing and thermal detection technologies.</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

Magnetism, magnetoresistance, and temperature coefficient of resistance of the BaMnO3 compound

  • 期刊论文

  • 发表日期：

    2025年7月28日

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

摘要

We present a comprehensive investigation of the structural, magnetic, and magnetotransport properties of hexagonal BaMnO3, with particular emphasis on its temperature coefficient of resistance (TCR) and low-field magnetoresistance (LFMR). The X-ray diffraction (XRD) pattern confirms the single-phase 15R-type hexagonal structure (space group R-3 m) of the BaMnO3. The particles of BaMnO3 compound are evenly distributed, that can be proved by the scanning electron microscope (SEM). The energy dispersive spectrometer (EDS) reveals a Ba:Mn:O stoichiometric ratio of 20.24:20.55:59.21, consistent with the nominal composition. Magnetic characterization reveals a spin glass state below 50 K arising from competing ferromagnetic (FM) and antiferromagnetic (AFM) interactions. Remarkably, this AFM insulator exhibits significant low-field magnetoresistance (LFMR = 16.5% at µ0H = 1 T) and good TCR values, reaching −6.1% K−1 at temperature of 220 K and −3.2% K−1 at room temperature. These findings demonstrate BaMnO3 potential for antiferromagnetic spintronic applications, particularly in magnetic sensing and thermal detection technologies.