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Ca-doping effects on N-type ferrimagnetism of NdVO3

机译：Ca掺杂对NdVO3的N型亚铁磁性的影响

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摘要

Ca2+-doping effects were studied on the N-type ferritmagnet of NdVO3. The chemical pressures by Ca2+-doping induced lowering of ferrimagnetic transition temperature T-c and compensation temperature theta(c) resulting in the phase transition from N-to P-type ferrimagnetic phase. In the N-phase, spontaneous magnetization M-sp becomes zero at finite temperature theta(c) and in the P-phase, M-sp is positive in whole temperature range. It was revealed that NdVO3 and Ca0.1Nd0.9VO3 located in the N-phase and Ca0.2Nd0.8VO3 in the P-phase. This N --> P transition by the chemical pressure was discussed by the intra- and inter-sublattice exchange integrals estimated from the molecular field approximation. (C) 2005 Elsevier Ltd. All rights reserved.
机译：研究了NdVO3的N型铁氧体对Ca2 +掺杂的影响。 Ca 2+掺杂引起的化学压力导致亚铁磁性转变温度T-c和补偿温度theta（c）降低，从而导致从N型转变为P型亚铁磁性相。在N相中，自发磁化M-sp在有限温度theta（c）处变为零，在P相中，M-sp在整个温度范围内为正。发现NdVO3和Ca0.1Nd0.9VO3位于N相，而Ca0.2Nd0.8VO3位于P相。通过分子场近似估计的亚晶格内和亚晶格间交换积分讨论了化学压力引起的这种N-> P跃迁。 （C）2005 Elsevier Ltd.保留所有权利。

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