Magnetic phase transitions, metastable states, and magnetic hysteresis in the antiferromagnetic compounds Fe_(0.5)TiS_(2-y)Se_y

Baranov N. V; Selezneva N. V; Sherokalova E. M.; Baglaeva Y. A.; Ovchinnikov A. S.; Tereshchenko A. A.; Gorbunov D. I; Volegov A. S.; Sherstobitov A. A.

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Magnetic phase transitions, metastable states, and magnetic hysteresis in the antiferromagnetic compounds Fe_(0.5)TiS_(2-y)Se_y

机译：反铁磁性化合物Fe_（0.5）TiS_（2-y）Se_y中的磁性相变，亚稳态和磁滞

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The phase transitions and magnetization processes in the antiferromagnetic compounds Fe0.5TiS2-ySey [FeTi2(S,Se)(4)] with an ordered layered crystal structure of the Cr3S4 type have been studied by using x-ray diffraction, measurements of the specific heat, electrical resistivity, magnetoresistance, and the magnetization in steady and pulsed magnetic fields together with calculations within the Ising model accounting the magnetoelastic interactions. The change from the spin-flip to spin-flop type phase transition and a monotonic growth of the critical transition field from similar to 50 kOe at y = 0 up to 470 kOe at y = 2 has been observed with the Se for S substitution in antiferromagnetic (AFM) compounds Fe0.5TiS2-ySey. In the selenium-poor compounds (y 0.5), the field-induced AFM-FM phase transition at low temperatures is accompanied by ultrasharp changes in the magnetization and magnetoresistance and by huge magnetic hysteresis. The presence of remnant magnetoresistance in these compounds after the application of a magnetic field indicates the formation of a metastable field-induced FM state. Despite an AFM ground state, the Fe0.5TiS2-ySey compounds with y 0.5 after application of a magnetic field behave at low temperatures as high-anisotropic Ising-type ferromagnets with the coercive field H-c up to similar to 60 kOe. It has been shown, that magnetoelastic interactions may be responsible for the formation of the metastable field-induced high-coercive FM state in the Ising-type antiferromagnets.

机译：利用x射线衍射研究了具有铁氧体结构的Cr3S4型有序层状晶体结构的反铁磁性化合物Fe0.5TiS2-ySey [FeTi2（S，Se）（4）]的相变和磁化过程，并测量了比值。热，电阻率，磁阻和稳定磁场和脉冲磁场中的磁化强度，以及在Ising模型中进行的计算（考虑了磁弹性相互作用）。观察到了从自旋翻转型到自翻转翻转型相变的变化，以及临界跃迁场的单调增长，从y = 0的50 kOe到y = 2的470 kOe，用Se取代S反铁磁（AFM）化合物Fe0.5TiS2-ySey。在贫硒化合物中（y <0.5），在低温下磁场诱导的AFM-FM相变伴随着磁化和磁阻的超陡变化，以及巨大的磁滞现象。在施加磁场之后，这些化合物中残留的磁阻表示存在亚稳态的磁场诱导的FM状态的形成。尽管具有AFM基态，施加磁场后y <0.5的Fe0.5TiS2-ySey化合物在低温下仍表现为高各向异性Ising型铁磁体，其矫顽场H-c高达60 kOe。已经表明，在伊辛型反铁磁体中，磁弹性相互作用可能是导致亚稳态磁场诱导的高矫顽FM状态形成的原因。

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《Physical review》 |2019年第2期|024430.1-024430.14|共14页
作者
Baranov N. V; Selezneva N. V; Sherokalova E. M.; Baglaeva Y. A.; Ovchinnikov A. S.; Tereshchenko A. A.; Gorbunov D. I; Volegov A. S.; Sherstobitov A. A.;
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Russian Acad Sci, MN Mikheev Inst Met Phys, Ekaterinburg 620108, Russia|Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620002, Russia;

Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620002, Russia;

Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620002, Russia;

Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620002, Russia;

Russian Acad Sci, MN Mikheev Inst Met Phys, Ekaterinburg 620108, Russia|Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620002, Russia;

Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620002, Russia;

Helmholtz Zentrum Dresden Rossendorf, Hochfeld Magnetlab Dresden HLD EMFL, D-01328 Dresden, Germany;

Russian Acad Sci, MN Mikheev Inst Met Phys, Ekaterinburg 620108, Russia|Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620002, Russia;

Russian Acad Sci, MN Mikheev Inst Met Phys, Ekaterinburg 620108, Russia|Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620002, Russia;

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1. Magnetic phase transitions, metastable states, and magnetic hysteresis in the antiferromagnetic compounds Fe_(0.5)TiS_(2-y)Se_y [J] . Baranov N. V, Selezneva N. V, Sherokalova E. M., Physical review . 2019,第2期

机译：磁相转变，稳定状态和反铁磁化合物FE_（0.5）TIS_（2-Y）SE_Y中的磁滞后
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机译：反铁磁化合物Fe0.5TIS2-YSEY中的磁相转变，亚稳态和磁滞
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Magnetic phase transitions, metastable states, and magnetic hysteresis in the antiferromagnetic compounds Fe_(0.5)TiS_(2-y)Se_y

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