Magnetization steps at the ferromagnetic transition of (Mn,Fe)2(P,Si) single crystals

Bao, L.L.; Meijuan, W.; Yibole, H.; Ou, Z.Q.; Guillou, F.

doi:10.1016/j.jallcom.2023.172612

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…[ 145 ] Single crystals with different compositions were also obtained. [ 145–147 ] Miao et al. studied the development of magnetic moments from spatial and temporal aspects in the paramagnetic regime of (Mn,Fe) 2 (P,Si) by means of polarized neutron diffraction and muon‐spin relaxation techniques, and investigated the dynamics between short‐range magnetic correlations and long‐range magnetic ordering.…”

Section: Critical Magnetocaloric Materialsmentioning

confidence: 99%

Advanced Magnetocaloric Materials for Energy Conversion: Recent Progress, Opportunities, and Perspective

Zhang,

Miao,

van Dijk

et al. 2024

Advanced Energy Materials

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Solid‐state caloric effects as intrinsic thermal responses to different physical external stimuli (magnetic‐, uniaxial stress‐, pressure‐, and electric‐fields) can achieve a higher energy efficiency compared with traditional gas compression techniques. Among these effects, magnetocaloric energy conversion is regarded as the best available alternative and has been exploited extensively for promising application scenarios in the last decades. This review systematically introduces the magnetocaloric effect and its applications, and summarizes the corresponding representative magnetocaloric materials, as well as important progress in recent years. Specifically, the review focuses on some key understandings of the magnetocaloric effect by utilizing state‐of‐the‐art technical tools such as synchrotron X‐ray, neutron scattering, muon spin spectroscopy, positron annihilation spectroscopy, high magnetic fields, etc., and highlights their importance toward advanced materials design and development. An overview of the basic principles and applications of these advanced techniques on magnetocaloric materials is provided. Finally, the challenges and perspectives on further developments in this field are discussed. Further in‐depth understanding and manufacturing technology advancement combined with fast‐developed artificial intelligence and machine learning are expected to advance the magnetocaloric energy conversion technology closer to real applications.

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Section: Critical Magnetocaloric Materialsmentioning

confidence: 99%

Advanced Magnetocaloric Materials for Energy Conversion: Recent Progress, Opportunities, and Perspective

Zhang,

Miao,

van Dijk

et al. 2024

Advanced Energy Materials

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“…As a result, different preparation techniques yielding various microstructures lead to dissimilar magnetic properties for a given composition and affect the magnetocaloric performances. Various methods have been investigated to prepare Fe 2 P-type MnFe(P,Si) and MnFe(P,Si,B) magnetocaloric materials including drop synthesis [39], casting [40], arc-melting [41], melt-spinning [42], and single crystal [43] methods. Yet, until now, a solid-state synthesis after a ball-milling stage remains the most widely used and that yielding among the highest magnetocaloric performances [44].…”

Section: Introductionmentioning

confidence: 99%

Structure, Microstructure and Magnetocaloric/Thermomagnetic Properties at the Early Sintering of MnFe(P,Si,B) Compounds

Qianbai,

Yibole,

Guillou

2024

Metals

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Minimizing the sintering time while ensuring high performances is an important optimization step for the preparation of magnetocaloric or thermomagnetic materials produced by powder metallurgy. Here, we study the influence of sintering time on the properties of a Mn0.95Fe1P0.56Si0.39B0.05 compound. In contrast to former reports investigating different annealing temperatures during heat treatments of several hours or days, we pay special attention to the earliest stages of sintering. After ball-milling and powder compaction, 2 min sintering at 1100 °C is found sufficient to form the desired Fe2P-type phase. Increasing the sintering time leads to a sharper first-order magnetic transition, a stronger latent heat, and usually to a larger isothermal entropy change, though not in all cases. As demonstrated by DSC or magnetization measurements, these parameters present dissimilar time evolutions, highlighting the existence of various underlying mechanisms. Chemical inhomogeneities are likely responsible for broadened transitions for the shortest sinterings. The development of strong latent heat requires longer sinterings than those for sharpening the magnetic transition. The microstructure may play a role as the average grain size progressively increases with the sintering time from 3.5 μm (2 min) to 30.1 μm (100 h). This systematic study has practical consequences for optimizing the preparation of MnFe(P,Si,B) compounds, but also raises intriguing questions on the influence of the microstructure and of the chemical homogeneity on magnetocaloric or thermomagnetic performances.

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Spin-torque nano-oscillators and their applications

Jiang,

Yao,

Wang

et al. 2024

Applied Physics Reviews

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Spin-torque nano-oscillators (STNOs) have emerged as an intriguing category of spintronic devices based on spin transfer torque to excite magnetic moment dynamics. The ultra-wide frequency tuning range, nanoscale size, and rich nonlinear dynamics have positioned STNOs at the forefront of advanced technologies, holding substantial promise in wireless communication, and neuromorphic computing. This review surveys recent advances in STNOs, including architectures, experimental methodologies, magnetodynamics, and device properties. Significantly, we focus on the exciting applications of STNOs, in fields ranging from signal processing to energy-efficient computing. Finally, we summarize the recent advancements and prospects for STNOs. This review aims to serve as a valuable resource for readers from diverse backgrounds, offering a concise yet comprehensive introduction to STNOs. It is designed to benefit newcomers seeking an entry point into the field and established members of the STNOs community, providing them with insightful perspectives on future developments.

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Magnetization steps at the ferromagnetic transition of (Mn,Fe)2(P,Si) single crystals

Cited by 3 publications

References 38 publications

Advanced Magnetocaloric Materials for Energy Conversion: Recent Progress, Opportunities, and Perspective

Advanced Magnetocaloric Materials for Energy Conversion: Recent Progress, Opportunities, and Perspective

Structure, Microstructure and Magnetocaloric/Thermomagnetic Properties at the Early Sintering of MnFe(P,Si,B) Compounds

Spin-torque nano-oscillators and their applications

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