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首页> 外文期刊>Materials Chemistry and Physics >Induced ferromagnetic metallic state and Griffiths phase in La_(1/2)Ca_(1/2)Mn_(1-x)Mo_xO_3 compounds
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Induced ferromagnetic metallic state and Griffiths phase in La_(1/2)Ca_(1/2)Mn_(1-x)Mo_xO_3 compounds

机译:La_(1/2)Ca_(1/2)Mn_(1-x)Mo_xO_3化合物的感应铁磁金属态和格里菲斯相

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摘要

We have investigated the magnetic and transport properties of the La_(0.5)Ca_(0.5)Mm_(1-x)Mo_xQ_3 (0.0 ≤ x ≤ 0.1) compounds. Partial substitution of Mn by Mo destroys the charge-ordering (CO) phase and induces the ferromagnetic (FM) metallic transition at low temperatures in the samples. The thermo-magnetic irre-versibility observed in both resistivity p (T) and magnetization M (T) curves suggest a competing scenario due to the coexistence of different phases in the Mo doped samples. In addition, a deviation from the Curie-Weiss behavior in the inverse susceptibility far above the Curie temperature (T_C) indicates the existence of Griffiths phase (GP) in the Mo-doped compounds. The above results can be interpreted based on the induced Mn~(2+) species by Mo substitution in the La_(0.5)Ca_(0.5)Mn_(1-x)Mo_xO_3 system.
机译:我们研究了La_(0.5)Ca_(0.5)Mm_(1-x)Mo_xQ_3(0.0≤x≤0.1)化合物的磁性和输运性质。 Mo替代Mn会破坏样品中的电荷有序(CO)相并诱导铁磁(FM)金属转变。在电阻率p(T)和磁化强度M(T)曲线中观察到的热磁不可逆性表明,由于Mo掺杂样品中不同相的共存,因此存在竞争。另外,在远高于居里温度(T_C)的逆磁化率中与居里-魏斯行为的偏离表明在掺Mo的化合物中存在格里菲斯相(GP)。以上结果可以基于在La_(0.5)Ca_(0.5)Mn_(1-x)Mo_xO_3系统中通过Mo取代引起的Mn〜(2+)种类来解释。

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