用中子衍射方法测定了锌-$_x$-Mn $_{3-x}$-O $_4$（其中$x$ = 0，0.25，0.5，0.75和1）的钙钛矿固溶体的均匀、纯相的多晶样品。具有$x$ = 0.25、0.5和0.75的样品在低温下表现出移位的磁滞回线，这是在磁性复合材料中通常看到的交换偏置的特征。我们提出，不寻常的磁性行为出现的结果，亚铁磁和反铁磁区域是不同的，但缺乏长程有序的纳米级混合物。虽然在AC磁测量中看到一些玻璃态行为，但其幅度不足以解释所观察到的戏剧性交换偏置。此外，等温和热释电磁化测量区分这种材料从纯自旋玻璃。标题系统提供了一个铁磁Mn $_3$ O $_4$与反铁磁ZnMn $_2$ O $_4$合金化的见解，其中不同的磁性簇生长和渗透，以产生竞争订单之间的平稳过渡。
英文摘要：
Bulk specimens of the hetaerolite solid solution Zn$_x$Mn$_{3-x}$O$_4$, with $x$ = 0, 0.25, 0.5, 0.75, and 1 have been prepared as homogeneous, phase-pure polycrystalline samples as ascertained by neutron diffraction measurements. Samples with $x$ = 0.25, 0.5, and 0.75 exhibit shifted magnetic hysteresis loops at low temperature, characteristic of exchange bias typically seen in magnetic composites. We propose that the unusual magnetic behavior arises as a result of a nanoscale mixture of ferrimagnetic and antiferromagnetic regions that are distinct but lack long-range order. While some glassy behavior is seen in AC magnetic measurements, its magnitude is not sufficient to account for the observed dramatic exchange bias. Furthermore, isothermal and thermoremanent magnetization measurements distinguish this material from a pure spin glass. The title system offers insights into the alloying of a ferrimagnet Mn$_3$O$_4$ with an antiferromagnet ZnMn$_2$O$_4$ wherein distinct magnetic clusters grow and percolate to produce a smooth transition between competing orders.
Adaptation of Wallace's Approach to the Specific Heat of Elemental Solids with Significant Intrinsic Anharmonicity, Particularly the Light Actinide Metals
Origin of Large Dielectric Constant with Large Remnant Polarization and Evidence of Magnetoelectric Coupling in Multiferroic La modified BiFeO3-PbTiO3 Solid Solution
Long-lived, pulse-induced absorption in $\mathrm{LiNb}_{1-x}\mathrm{Ta}_x\mathrm{O}_3$ solid solutions: the case of three intrinsic defect sites for electron localization with strong coupling
Magnetic Behaviour of the $Bi_{2-y} Sr_y Ir_2 O_7$ Pyrochlore Solid Solution
研究了Bi $_{2-y}$ Sr $_{y}$ Ir $_{2}$ O $_{7}$体系在2 ~ 300 K温度范围内的磁化率随温度的变化关系。根据这些测量结果，固溶体$(0\leq y\leq 0.9)$没有显示出任何磁转变;然而，从居里-外斯定律发生了明显的偏离，并且该系统的磁行为可以归因于短程磁序，这也存在于几个几何阻挫系统中。泡利磁化率随着Sr含量的增加而降低，这可以与样品中向Ir $^{5+}$的偏移相关联; Ir的有效磁矩也降低。估计的威尔逊比表明存在强的电子-电子相关。
Direct observation of reversible ionic polarization at a buried solid-state battery interface
Nuclear Physics Institute of Czech Academy of Sciences（捷克科学院核物理研究所）；Slovak University of Technology in Bratislava（布拉迪斯拉发斯洛伐克理工大学）；SRM University-AP（SRM大学安得拉邦分校）；CNR-ITAE（意大利国家研究委员会离子技术及应用研究所）；University of Messina（墨西拿大学）
Structural ground states of ($A,A'$)Cr$_2$O$_4$($A$=Mg, Zn; $A^{\prime}$ = Co, Cu) spinel solid solutions: Spin-Jahn-Teller and Jahn-Teller effects
我们研究了少量的磁性取代基的$A$网站的挫折尖晶石MgCr $_2$ O $_4$和ZnCr $_2$ O $_4$的效果。具体来说，我们寻找自旋和晶格无序对这些化合物中伴随磁有序的结构变化的影响。在Zn $_{1-x}$ Co $_{x}$ Cr $_2$ O $_4$（其中0\，$<$ \，$x$\，$\leq$\，0.2）的非磁性Zn $^{2+}$位上取代Co $^{2+}$完全抑制了ZnCr $_2$ O $_4$的自旋Jahn-Teller畸变，尽管这些系统仍然受到抑制，并且磁有序在$T$ \，$<$\，20\，K的非常低的温度下发生。另一方面，在Mg $_{1-x}$ Cu $_{x}$ Cr $_2$ O $_4$和Zn $_{1-x}$ Cu $_{x}$ Cr $_2$ O $_4$中，Jahn-Teller活性Cu $^{2+}$取代Mg $^{2+}$和Zn $^{2+}$，其中0\，$<$\，$x$ \，$\leq$\，0.2在远高于这些固溶体的Néel温度的温度下诱导Jahn-Teller有序化，然而，自旋相互作用仍然受到在20 μ K以下发生的长程磁有序的阻碍，而没有任何进一步的晶格畸变。Jahn-Teller畸变固溶体Mg $_{1-x}$ Cu $_{x}$ Cr $_2$ O $_4$和Zn $_{1-x}$ Cu $_{x}$ Cr $_2$ …
Transport properties and Kohler's rule in $R$$_x$Lu$_{1-x}$B$_{12}$ solid solutions with $x$ $\leq$ 0.03: do charge stripes really exist in metallic dodecaborides?
