Observation of spontaneous spin reorientation in Nd1-x Dy x Fe3(BO3)4 ferroborates with a competitive R-Fe exchange

被引：22

作者：

Popov, Yu. F. ^{[1
]}

Kadomtseva, A. M. ^{[1
]}

Vorob'ev, G. P. ^{[1
]}

Mukhin, A. A. ^{[2
]}

Ivanov, V. Yu. ^{[2
]}

Kuz'menko, A. M. ^{[2
]}

Prokhorov, A. S. ^{[2
]}

Bezmaternykh, L. N. ^{[3
]}

Temerov, V. L. ^{[3
]}

机构：

[1] Moscow MV Lomonosov State Univ, Moscow 119992, Russia

[2] Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow 119991, Russia

[3] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660038, Russia

来源：

JETP LETTERS | 2009年 / 89卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

MAGNETIC-PROPERTIES; DYFE3(BO3)(4);

D O I：

10.1134/S002136400907008X

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic, magnetoelectric, and magnetoelastic properties of DyFe3(BO3)(4) single crystals and the Nd0.75Dy0.25Fe3(BO3)(4) substituted compound with the competitive Nd-Fe and Dy-Fe exchange interactions have been investigated in magnetic fields up to 210 kOe. It has been shown that the antiferromagnetic state in Nd0.75Dy0.25Fe3(BO3)(4) below the N,el temperature is easy-plane and a spontaneous spin-reorientation transition to a uniaxial state occurs near 25 K. Anomalies are observed in various physical characteristics in a spin-flop transition induced by the magnetic field along the trigonal axis. The H-T phase diagrams are constructed; they are in good agreement with a simple model taking into account the anisotropy of the exchange splitting and g factors of the ground doublets of the Dy3+ and Nd3+ ions. The features of the magnetoelectric effect in various magnetic phases have been studied. Spontaneous electric polarization has been revealed in the region of the existence of an easy-plane antiferromagnetic state in the substituted compound. A qualitative theoretical justification of the possibility of the appearance of the spontaneous spin-reorientation transition in the Nd0.75Dy0.25Fe3(BO3)(4) substituted compound is given.

引用

页码：345 / 351

页数：7

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