论文标题
探测3D抗铁磁铁中的磁各向异性和旋转钢化度过渡，ho $ _ {0.5} $ dy $ _ {0.5} $ _ {0.5} $ feo $ _ {3}
Probing magnetic anisotropy and spin-reorientation transition in 3D antiferromagnet, Ho$_{0.5}$Dy$_{0.5}$FeO$_{3}\vert$Pt using spin Hall magnetoresistance
论文作者
论文摘要
Orthoferrites ($RE$FeO$_{3}$) containing rare-earth ($RE$) elements are 3D antiferromagnets (AFM) that exhibit characteristic weak ferromagnetism originating due to slight canting of the spin moments and display a rich variety of spin reorientation transitions in the magnetic field ($H$)-temperature ($T$) parameter space.我们介绍了关于$ b $ plate（$ ac $ - 平面）的旋转霍尔磁场（SMR）的研究，crystalline ho $ _ {0.5} $ _ {0.5} $ _ {0.5} $ _ {0.5} $ feo $ _ {3} | $ pt（hdfo $ | $ | $ | $ | $ | $ | f_z）$ phoes，两个退化域之间的切换，$γ_4（ +g_x， +f_z）$和$γ_4（-g_x，-f_z）$在临界值高于临界值的字段中出现，$ h _ {\ text {c}}}}} \ of oe oe。在$ h> h _ {\ text {c}} $下，在$γ_4（g_x，a_y，f_z）$ apepar中，smr（$α$ -scan）的角度依赖性产生了一个高度偏斜的曲线，并带有尖锐的变化（sign-reversal），以及旋转interational interational interational interational houstrational interational houstrational intertoration $ -Axaxis $ -Axaxis。这种磁滞随着$ H $的增加而减少。值得注意的是，在$ h <h _ {\ text {c}} $中，单个域上的$α$ -Scan测量值，$γ_4（\ pm g_x，\ pm f_z）$表现出异常的周期性弦乐信号360度。低$ T $ SMR曲线（$ H $ = 2.4 KOE）显示了滞后（降至150 K）的系统缩小，偏度（150至52 K）的逐渐减少（表明各向异性的趋势可能会削弱，可能是由于$ t $ t $ fe-re $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $。在25 K以下，SMR调制显示在$ C $轴周围突然变化，标志着$γ_2（f_x，c_y，g_z）$相位的存在。我们采用了简单的哈密顿量并计算出SMR来检查观察到的偏斜SMR调制。总而言之，发现SMR是探测磁各向异性以及HDFO中的自旋重新定位的有效工具。我们的自旋传输研究突出了HDFO对未来AFM Spintronic设备的潜力。
Orthoferrites ($RE$FeO$_{3}$) containing rare-earth ($RE$) elements are 3D antiferromagnets (AFM) that exhibit characteristic weak ferromagnetism originating due to slight canting of the spin moments and display a rich variety of spin reorientation transitions in the magnetic field ($H$)-temperature ($T$) parameter space. We present spin Hall magnetoresistance (SMR) studies on a $b$-plate ($ac$-plane) of crystalline Ho$_{0.5}$Dy$_{0.5}$FeO$_{3}|$Pt (HDFO$|$Pt) hybrid at various $T$ in the range, 11 to 300 K. In the room temperature $Γ_4(G_x, A_y, F_z)$ phase, the switching between two degenerate domains, $Γ_4(+G_x, +F_z)$ and $Γ_4(-G_x, -F_z)$ occurs at fields above a critical value, $H_{\text{c}} \approx 713$ Oe. Under $H > H_{\text{c}}$, the angular dependence of SMR ($α$-scan) in the $Γ_4(G_x, A_y, F_z)$ phase yielded a highly skewed curve with a sharp change (sign-reversal) along with a rotational hysteresis around $a$-axis. This hysteresis decreases with an increase in $H$. Notably, at $H < H_{\text{c}} $, the $α$-scan measurements on the single domain, $Γ_4(\pm G_x, \pm F_z)$ exhibited an anomalous sinusoidal signal of periodicity 360 deg. Low-$T$ SMR curves ($H$ = 2.4 kOe), showed a systematic narrowing of the hysteresis (down to 150 K) and a gradual reduction in the skewness (150 to 52 K), suggesting weakening of the anisotropy possibly due to the $T$-evolution of Fe-$RE$ exchange coupling. Below 25 K, the SMR modulation showed an abrupt change around the $c$-axis, marking the presence of $Γ_2(F_x,C_y,G_z)$ phase. We have employed a simple Hamiltonian and computed SMR to examine the observed skewed SMR modulation. In summary, SMR is found to be an effective tool to probe magnetic anisotropy as well as a spin reorientation in HDFO. Our spin-transport study highlights the potential of HDFO for future AFM spintronic devices.
