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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Magnetic-resonance and thermophysical studies of the magnetic phase diagram for a GdFe_(2.1)Ga_(0.9)(BO_3)_4 single crystal
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Magnetic-resonance and thermophysical studies of the magnetic phase diagram for a GdFe_(2.1)Ga_(0.9)(BO_3)_4 single crystal

机译：GdFe_（2.1）Ga_（0.9）（BO_3）_4单晶的磁相图的磁共振和热物理研究

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摘要

The antiferromagnetic resonance, heat capacity, magnetic properties, and magnetic phase diagram of a GdFe_3(BO_3)_4 crystal in which some of the iron ions were substituted by diamagnetic gallium ions have been investigated. It has been found that the Neél temperature upon diamagnetic substitution decreased to 17 K compared to 38 K in the unsubstituted crystal. The effective exchange and anisotropy fields for GdFe _(2.1)Ga_(0.9)(BO_3)_4 have been estimated from the field dependences of magnetization and resonance measurements. The magnetic phase diagram of the crystal has been constructed from magnetic and resonance measurements. In GdFe_(2.1)Ga_(0.9)(BO _3)_4, there is no spontaneous reorientation and, in the absence of a magnetic field, the crystal remains an easy-axis one in the entire domain of magnetic ordering. The critical field of the reorientation transition to an induced easy-plane state in a magnetic field along the trigonal axis has been found to increase compared to that in the unsubstituted crystal.
机译：研究了其中一些铁离子被抗磁性镓离子取代的GdFe_3（BO_3）_4晶体的反铁磁共振，热容，磁性和磁相图。已经发现，与未取代的晶体中的38 K相比，抗磁取代时的Neél温度降低至17K。 GdFe _（2.1）Ga_（0.9）（BO_3）_4的有效交换场和各向异性场已从磁化强度和共振测量的场依赖性进行了估算。晶体的磁性相图是根据磁性和共振测量结果构建的。在GdFe_（2.1）Ga_（0.9）（BO_3）_4中，没有自发的重新取向，并且在没有磁场的情况下，晶体在整个磁有序域中保持易轴取向。已经发现，与未取代的晶体相比，在沿着三角轴的磁场中重新取向转变为感应的易平面状态的临界场增加了。

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