Pressure effects on magnetic phase transitions in FeRh and FeRhIr alloys

Vinokurova, L.; Власов, А. В.; Pardavi‐Horváth, M.

doi:10.1002/pssb.2220780136

Cited by 58 publications

(30 citation statements)

References 11 publications

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“…Excitation of the phase transition occurs when energy is added to the system allowing one to use a wide range of stimuli to induce the metamagnetic phase transition, such as, electric field [11], temperature [1], applied magnetic fields [12,13], pressure [14], and spin-polarized currents [15] making it a tempting candidate for future magnetic-based technological devices.…”

Section: Introductionmentioning

confidence: 99%

Modeling the thickness dependence of the magnetic phase transition temperature in thin FeRh films

et al. 2017

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FeRh and its first-order phase transition can open new routes for magnetic hybrid materials and devices under the assumption that it can be exploited in ultra-thin-film structures. Motivated by experimental measurements showing an unexpected increase in the phase transition temperature with decreasing thickness of FeRh on top of MgO, we develop a computational model to investigate strain effects of FeRh in such magnetic structures. Our theoretical results show that the presence of the MgO interface results in a strain that changes the magnetic configuration which drives the anomalous behavior.

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Section: Introductionmentioning

confidence: 99%

Modeling the thickness dependence of the magnetic phase transition temperature in thin FeRh films

et al. 2017

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“…[1][2][3][4] Numerous studies have shown that variations in the applied external magnetic field as well as strain can modify the magnetostructural phase transition character and transition temperature (henceforth denoted T t ) in both bulk and thin film forms of FeRh. [5][6][7][8] In particular, an applied magnetic field has been demonstrated to linearly decrease the transition temperature at a rate of À8 K/T in both bulk and thin film forms of FeRh. 5,9 Thin film forms of FeRh are particularly interesting due to their heightened sensitivity to strain that may contribute to unique properties such as the observed persistence of retained ferromagnetism below the bulk phase transition temperature.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the FeRh magnetostructural response with Au diffusion

Loving¹,

Vries²,

Jimenez-Villacorta³

et al. 2012

Journal of Applied Physics

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Factors which contribute to magnetostructural transition control have been demonstrated by study of the effects of Au incorporation on the magnetic and structural character of CsCl-structured equiatomic FeRh thin films. Sputtered films were capped with 2 nm of Au deposited at 873 K and at 323 K and subsequently characterized with magnetometry and synchrotron-based structural probes. Diffusion of Au into the FeRh film layer at 873 K is confirmed by a reduction in the Au capping layer thickness relative to the film capped at 323 K. The impact of Au diffusion on the FeRh magnetostructural character is noted by a decrease in the onset of the transition temperature, a thermally broadened first-order transition and an increased sensitivity of the transition to applied magnetic field. Additionally, magnetization data indicate that Au diffusion causes retention of the ferromagnetic phase well below the normal magnetostructural transition temperature. These results are attributed to a multiphase FeRh film layer created by thermally driven Au diffusion.

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“…The features of the transition such as the critical temperature, the width of the thermal hysteresis, and the abruptness of the transition are extremely sensitive to the chemical composition of the alloy, preparation technique of the samples, and their thermal and mechanical treatment [6,10,14,[19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Thus, the critical temperature of the transition may vary from 143 K up to 408 K when changing the Rh concentration within 47-63 at.% [30,33,34], and from 150 K to 585 K by 3d-, 4d-, and 5d-metal impurities [24,26,30,[34][35][36][37][38][39][40][41]. For example, the critical temperature of the transition in the (Fe 1−x Ni x ) 49 Rh 51 alloys decreases from 320 K for x = 0 to 150 K for x = 0.035 [24].…”

Section: Introductionmentioning

confidence: 99%