Giant reversible adiabatic temperature change and isothermal heat transfer of MnAs single crystals studied by direct method in high magnetic fields

Koshkid’ko, Yu. S.; Dilmieva, E. T.; Ćwik, J.; Rogacki, K.; Kowalska, Dorota A.; Kamantsev, A. P.; Коледов, В. В.; Маширов, А. В.; Шавров, В. Г.; Val’kov, V. I.; Golovchan, A. V.; Sivachenko, A.P.; Shevyrtalov, Sergey; Rodionova, Valeria; Щетинин, И. В.; Sampath, V.

doi:10.1016/j.jallcom.2019.05.246

Cited by 40 publications

(13 citation statements)

References 32 publications

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“…Manganites [258] include La 0.7 Ca 0.3 MnO 3 [227,262,264,285], La 0.48 Ca 0.52 MnO 3 [174], Na-deficient La 0.8 Na 0.2−x MnO 3 [185], La 0.67 Sr 0.16 Ca 0.17 MnO 3 [207], La 0.8−x K x Ba 0.05 Sr 0.15 MnO 3 [297], as well as containing critical rare earth La 0.7−x Pr x Ca 0.3 MnO 3 [160], GdMnO 3 [186], Gd 2 NiMnO 6 and Gd 2 CoMnO 6 [193], TbMnO 3 [165,252], DyMnO 3 [247], PrPb manganites [294], etc. Materials containing highly toxic arsenic include MnAs [123,131,210,238,245,246,256,265,273,276,282,289] and MnFe(P,As) [48,49,239,298]. However, interest is shifting towards less toxic materials without As, such as (Mn,Fe) 2 (P,Si) [125,126,150] doped with Ge [109,205] or B [184,201,215].…”

Section: ∆S T T C (K) ∆T S (K)mentioning

confidence: 99%

Viable Materials with a Giant Magnetocaloric Effect

Zarkevich

Zverev

2020

Crystals

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This review of the current state of magnetocalorics is focused on materials exhibiting a giant magnetocaloric response near room temperature. To be economically viable for industrial applications and mass production, materials should have desired useful properties at a reasonable cost and should be safe for humans and the environment during manufacturing, handling, operational use, and after disposal. The discovery of novel materials is followed by a gradual improvement of properties by compositional adjustment and thermal or mechanical treatment. Consequently, with time, good materials become inferior to the best. There are several known classes of inexpensive materials with a giant magnetocaloric effect, and the search continues.

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Section: ∆S T T C (K) ∆T S (K)mentioning

confidence: 99%

Viable Materials with a Giant Magnetocaloric Effect

Zarkevich

Zverev

2020

Crystals

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“…В то же время, значения обратного МКЭ в сплаве Mn 2 NiGa не велики -максимальное полученное значение составило T = −2.7 K при начальной температуре 345 K в магнитном поле 50 Т (рис. 8), что значительно ниже по величине, чем у РГС [17,18], а также ниже, чем у других известных магнитокалорических материалов с избытком Mn [20,21].…”

Section: конференция "unclassified

Магнитокалорический эффект и эффект памяти формы в сплаве Гейслера Mn-=SUB=-2-=/SUB=-NiGa

Каманцев¹,

Кошкидько²,

Bykov

et al. 2020

Физика Твердого Тела

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The work presents the investigations of the functional properties of the Heusler alloy Mn2NiGa, made by argon arc melting. The direct experimental methods were used to study: electrical resistance, magnetization, magnetocaloric effect, and shape memory effect in the wide temperature range of 100–400 K. The inverse magnetocaloric effect was found in both the martensitic and austenitic phases, which did not experience saturation in pulsed magnetic field up to 50 T. The values of reversible deformation in the alloy up to 0.35% were obtained with bending mechanical stress up to 247 MPa.

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“…В диапазоне давлений 0 ≤ P ≤ 40 kbar различают: " высокоспиновую" HS(P6 3 /mmc) В8 1 и " низкоспиновую" LS(Pnma) В31 фазы MnAs [11,12]. В целом, в обоих классах систем стабилизация магнитного порядка является причиной существования усиленного фазовым переходом магнитнокалорического эффекта [13,14]. Аномальные зависимости χ −1 (T ) в пниктидах Mn 1−y A y As и германидах Mn 1−x B x NiGe существенно отличаются, поскольку структурные переходы PM(P6 3 /mmc)−PM(Pnma) сходные по симметрийногрупповым характеристикам различны по характеру реализации.…”

Section: Introductionunclassified

Температурно-Барические Особенности Магнитных Характеристик В Системах Со Структурными Переходами Типа Смещения

Вальков¹,

Головчан²,

Грибанов³

et al. 2023

Физика Твердого Тела

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Using pnictides MnAs and germaindes Mn0.89Cr0.11NiGe as an example, the transformation of thermobaric features of their magnetic characteristics at high pressures is considered. A unified approach is used to describe paramagnetic (PM) structural transitions of the displacement type with a change in the symmetry PM(P63/mmc)-PM(Pnma) from hexagonal to orthorhombic. It is shown that the competition between the parameters of the structural and magnetic orders in both systems manifests itself differently in the stabilization and alternation of the so-called high-spin and low-spin magnetically ordered states initiated by pressure. As a consequence, the structural contribution in these systems weakens (MnAs) or enhances (Mn0.89Cr0.11NiGe ) the giant magnetocaloric effect in the temperature-baric region of the first-order magnetostructural phase transitions.

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Giant reversible adiabatic temperature change and isothermal heat transfer of MnAs single crystals studied by direct method in high magnetic fields

Cited by 40 publications

References 32 publications

Viable Materials with a Giant Magnetocaloric Effect

Viable Materials with a Giant Magnetocaloric Effect

Магнитокалорический эффект и эффект памяти формы в сплаве Гейслера Mn-=SUB=-2-=/SUB=-NiGa

Температурно-Барические Особенности Магнитных Характеристик В Системах Со Структурными Переходами Типа Смещения

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