Abstract Magnetic and magneto-transport properties of nanocrystalline Nd 0.5 Ca 0.5 MnO 3 compound are presented. In contrast to its bulk counterparts, with modification of the magnetic grounds state, large magnetoresistance appeared in the presence of comparatively lower magnetic field in nanocrystalline compound. Additionally, the magnetic field induced insulator-metal transition took place in nanocrystalline compound with negligible thermal hysteresis. From application perspectives, observation of the low field magnetoresistance in this compound may be important for several uses in magnetic field sensor related technology. Fundamentally, the influences of the ferromagnetic phase fraction as well as the induced ferromagnetic interaction in nanocrystalline samples on magnetic and magneto-transport properties were addressed.

中文翻译：

---

纳米晶Nd0.5Ca0.5MnO3化合物的磁性和磁输运特性研究：大磁阻观察

摘要 介绍了纳米晶Nd 0.5 Ca 0.5 MnO 3 化合物的磁性和磁输运特性。与其大量对应物相比，随着磁性基态的改变，在纳米晶化合物中存在相对较低的磁场时出现大的磁阻。此外，磁场诱导的绝缘体-金属转变发生在纳米晶化合物中，热滞后可忽略不计。从应用的角度来看，观察该化合物中的低场磁阻对于磁场传感器相关技术的多种用途可能很重要。从根本上解决了铁磁相分数以及纳米晶样品中感应铁磁相互作用对磁性和磁传输特性的影响。