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oe1(光电查) - 科学论文

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  • Density functional theory study of aluminium and chromium doped Yttrium ion garnet

    摘要： Density functional theory has been performed to investigate the atomic structure, electronic and magnetic properties of Al3+ and Cr3+ co-doped cubic Y3Fe5O12 (YIG) garnet crystal. Results show that Al3+ and Cr3+ ions are energetically substitution of Fe3+ at the tetrahedral and octahedral sites in YIG, respectively. The doping concentration do not affect the preferential site occupancy for separate individual substitution. The magnetic moment increases and decreases for the single Cr and Al element doping, respectively. The magnetic moment and lattice constant decreases with the increase of Al–Cr concentrations. The magnetic moment decrease from 5.0 to 3.875 μB linearly with x increases from 0 to 0.4 in Y3AlxCrxFe5?xO12. These results indicate that doping can be adopted for the modi?cation of magnetic properties of YIG.

    关键词： doping,magnetic moment,density functional theory,Y3Fe5O12 (YIG)

    更新于2025-09-23 15:23:52

  • Anomalous Hall-like transverse magnetoresistance in Au thin films on Y <sub/>3</sub> Fe <sub/>5</sub> O <sub/>12</sub>

    摘要： Anomalous Hall-like signals in platinum in contact with magnetic insulators are common observations that could be explained by either proximity magnetization or spin Hall magnetoresistance (SMR). In this work, longitudinal and transverse magnetoresistances are measured in a pure gold thin film on the ferrimagnetic insulator Y3Fe5O12 (Yttrium Iron Garnet, YIG). We show that both the longitudinal and transverse magnetoresistances have quantitatively consistent scaling in YIG/Au and in a YIG/Pt reference system when applying the SMR framework. No contribution of an anomalous Hall effect due to the magnetic proximity effect is evident.

    关键词： gold thin films,Anomalous Hall effect,Y3Fe5O12,proximity magnetization,spin Hall magnetoresistance

    更新于2025-09-09 09:28:46