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The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
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Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
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解码磁位位定位错误在铁磁赛道上的磁位位定位错误.

Mio Ishibashi1, Masashi Kawaguchi1, Yuki Hibino2

  • 1Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan.

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这项研究量化了磁域壁写入和转移在Pt/GdFeCo双层中的位位定位错误,这对于可靠的存储类内存至关重要. 结果显示小,可控的错误,使密集的磁域墙壁包装.

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科学领域:

  • 这就是Spintronics.
  • 材料科学 材料科学 材料科学
  • 非易失性记忆技术的应用.

背景情况:

  • 电流驱动的磁域墙壁运动对于存储类内存等先进的内存设备至关重要.
  • 现有的研究重点是高速和低功率域壁传播,但可靠性仍未得到充分探索.
  • 了解操作错误对于实际实施基于域壁的内存至关重要.

研究的目的:

  • 通过使用短电流脉冲来调查和量化写作错误和移动磁域墙壁的数量.
  • 在Pt/GdFeCo双层系统中评估域墙操作的可靠性.
  • 为了确定铁磁赛道中高度拥挤的域墙的可行性.

主要方法:

  • 利用纳秒电流脉冲在5微米宽的Pt/GdFeCo电线中写入和移动磁域壁.
  • 测量比特定位错误与在线程边缘写域墙相关.
  • 在域墙转移过程中量化错误,并分析错误相关性.

主要成果:

  • 在线程边缘写一个域墙导致位位定位误差大约为0.3微米.
  • 转移操作导致每2纳秒电流脉冲大约0.1微米的误差.
  • 在足够大的电流驱动下,连续轮换之间的错误相关性被发现是可以忽略不计的.

结论:

  • 该研究成功解码了磁域墙操作中的错误,提供了关键可靠性数据.
  • 识别的错误大小表明,高度包装的域墙的可靠操作是可以实现的.
  • 这些发现支持铁磁赛道在密集和可靠的数据存储方面的潜力.