Electric field controlled magnetic phase transition in Fe49Rh51 based magnetoelectric composites

Амиров, А. А.; Starkov, A. S.; Starkov, Ivan A.; Kamantsev, A. P.; Rodionov, V. V.

doi:10.22226/2410-3535-2018-3-353-357

Cited by 11 publications

(10 citation statements)

References 13 publications

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“…The structure and elemental MAGNETISM composition of the sample corresponding to the desired formula Fe 49 Rh 51 were confirmed by energydispersion spectroscopy (EDS) and X-ray diffraction analysis (XRD). A detailed description of the EDS and XRD results for the obtained samples is presented in [12]. Differential scanning calorimetry (DSC) was carried out on a Netzsch instrument in the zero magnetic field.…”

Section: Methodsmentioning

confidence: 99%

Magnetocaloric Effect in Alloy Fe49Rh51 in Pulsed Magnetic Fields up to 50 T

et al. 2020

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Magnetocaloric effect (MCE) in pulsed magnetic fields up to 50 T was directly studied in alloy Fe 49 Rh 51. An inverse MCE ΔT ≈-8 K is observed at different initial temperatures around the metamagnetic phase transition upon field rising to 20 T; further growth of the field to 50 T leads to a decrease in the absolute adiabatic temperature change by nearly 1 K, which is due to the direct MCE and proves that the whole sample undergoes a transition into the ferromagnetic phase. Upon the field decrease, the maximal absolute value of the adiabatic temperature change of |ΔT| = 9.8 K was revealed at 6 T when the initial temperature is 310 K.

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Section: Methodsmentioning

confidence: 99%

Magnetocaloric Effect in Alloy Fe49Rh51 in Pulsed Magnetic Fields up to 50 T

et al. 2020

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“…Для этих целей используются как " толстые" слоистые композиты, полученные склеиванием компонент магнитокалорического и пьезоэлектрического материалов, так и путем напыления осаждения магнитокалорических пленок на пьезоэлектрические подложки с помощью различных методик. В работах [52][53][54] приводятся исследования магнитных, магнитокалорических и магнитоэлектрических свойств двух(трех) слойных мультикалорических композитов, изготовленных склеиванием пластин магнитокалорического и пьезоэлектрического материалов при различных режимах приложения электрического поля.…”

Section: мультикалорические эффекты в композитных мультиферроикахunclassified

“…Возможность управления магнитными свойствами магнитокалорического материала, через механическое напряжение индуцируемое за счет обратного пьезоэффекта на примере " толстых" двухслойных Fe−Rh/PZT и трехслойных PZT/Fe−Rh/PZT МЭ-композитов, изготовленных склеиванием с сопоставимыми значения толщин слоев была продемонстрировано в работе [52]. Так, например, приложение постоянного электрического напряжения к слою PZT приводит к уменьшению ширины температурного гистерезиса до 3 K в двухслойном композите Fe−Rh/PZT при приложении электрического напряжения 25 V и до 4 K в случае трехслойного композита PZT/Fe−Rh/PZT при 50 V. Наблюдаемое смещение авторы объясняют механическим воздействием пьезоактивных слоев PZT, индуцирующем деформацию магнитокалорического слоя Fe−Rh, что приводит к изменению его магнитных свойств.…”

Section: мультикалорические эффекты в композитных мультиферроикахunclassified

Мультикалорики --- Новые Материалы Энергетики И Стрейнтроники -=sup=-*-=/Sup=- (О Б З О Р)

Амиров¹,

Тишин²,

Пахомов³

2022

Физика Твердого Тела

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The terms "multicaloric effect" and "multicaloric" are relatively new concepts and combine the phenomena and materials associated with the coexistence of conventional caloric effects under the action of external forces of various nature (magnetic field, electric field, mechanical action). Nowadays, caloric materials remain in the focus of attention of researchers, and approaches based on the use of the multicaloric effect are considered as one of the ways to improve the efficiency of conventional solid-state cooling systems. Of particular interest from a fundamental point of view are the cross effects observed under the combined external stimulus, as well as the nature of the relationship between magnetic, electrical, thermophysical properties and structure under such actions. In this review, the theoretical foundations of the multicaloric effect are considered and an attempt is made to systematize multicaloric materials. Applied aspects of multicalorics are considered separately, and various experimental approaches to the study of their properties are presented. The presented review will be of interest to a wide range of specialists involved in the study of materials with caloric effects (magnetocaloric, electrocaloric, mechanocaloric), as well as those who are searching for new functional materials.

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“…В настоящее время предложенные подходы по получению мультикалоричеких композитов различного типа связности (0-3, 2-2, 1-3) активно реализовываются и зависят от конкретных решаемых практических задач [5][6][7][8][9].…”

Section: удк: 5379unclassified

Polymer Fe-Rh / PVDF multicaloric composite

2021

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A technological protocol has been developed and a polymer magnetoelectric Fe-Rh / PVDF composite consisting of magnetocaloric particles of Fe 50 Rh 50 embedded in a polymer piezoelectric matrix of polyvinyldenfluoride has been manufactured by solvent casting method. The particles of Fe 50 Rh 50 used for the composite fabrication were obtained from an ingot of the same composition by mechanical filing. The average size of the Fe 50 Rh 50 particles fabricated by the mechanical treatment was about 50 μm. X-ray diffraction analysis demonstrates the presence of an electroactive β-phase of polyvinyldenfluoride and an ordered B2 phase corresponding to a crystal structure with a base-centered crystal lattice of Fe 50 Rh 50 , which can exhibit magnetoelectric and multicaloric effects. It was shown that the temperature of the transition from the antiferromagnetic to the ferromagnetic state for Fe 50 Rh 50 microparticles is shifted towards higher temperatures of about 500 К as a result of the mechanical action in the process of obtaining Fe-Rh particles, and in the region of about 670 K, a transition from the ferromagnetic state to the paramagnetic one was observed. It has been demonstrated that annealing of the Fe 50 Rh 50 particles at a temperature of 1000°C for 20 minutes is able to recover the magnetic properties close to the bulk sample with a same composition. It should be noted that the annealing in this protocol does not completely eliminate the content of the disordered phase corresponding to the crystal structure with a face-centered cubic lattice, to the ordered structure with base-centered lattice that is seen from the data of magnetic and X-ray diffraction measurements. For the Fe-Rh / PVDF composite, a wide magnetic phase transition of at about 387 K (AFM-FM) in the heating mode and at approximately 364 K (FM-AFM) in the cooling mode was observed, which coincides with the results of magnetic measurements obtained for the heat-treated Fe 50 Rh 50 particles. The proposed method can be used for the design of new composite magnetoelectric composites with caloric effects.

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Electric field controlled magnetic phase transition in Fe49Rh51 based magnetoelectric composites

Cited by 11 publications

References 13 publications

Magnetocaloric Effect in Alloy Fe49Rh51 in Pulsed Magnetic Fields up to 50 T

Magnetocaloric Effect in Alloy Fe49Rh51 in Pulsed Magnetic Fields up to 50 T

Мультикалорики --- Новые Материалы Энергетики И Стрейнтроники -=sup=-*-=/Sup=- (О Б З О Р)

Polymer Fe-Rh / PVDF multicaloric composite

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