In-situ Thermal Demagnetization Observation of Nd-Fe-B Magnets with High Coercivity MFM Probe

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  • 高保磁力ＭＦＭ探針によるＮｄ－Ｆｅ－Ｂ磁石の熱消磁過程その場観察
  • コウホジリョク MFMタンシン ニ ヨル Nd Fe B ジシャク ノ ネツショウジカテイ ソノバ カンサツ

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  Magnetic force microscopy (MFM) using an FePt high coercivity probe and Q-control in vacuum enabled an accurate magnetic domain evaluation without changing of probe magnetization in observation of Nd-Fe-B sintered magnets. The effectiveness of this technique to conventional MFM was confirmed with magnetized sample by 50 kOe pulse field and thermally demagnetized sample. And an in-situ thermal demagnetization observation of the Nd-Fe-B sintered magnets succeeded using temperature-controlled MFM.

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