Emergence of room temperature stable skyrmionic bubbles in the rare earth based REMn2Ge2 (RE = Ce, Pr, and Nd) magnets

Hou, Zhipeng; Li, Lingwei; Liu, Chen; Gao, Xingsen; Ma, Zhenxing; Zhou, Guofu; Peng, Yong; Yan, Mi; Zhang, Xixiang; Liu, Junming

doi:10.1016/j.mtphys.2021.100341

Cited by 42 publications

(19 citation statements)

References 43 publications

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“…Reproduced with permission. [103] Copyright 2021, Elsevier. discovered: 1) the magnetic-order temperature of the abovementioned materials must be above room temperature; 2) most of these materials exhibited a noncollinear magnetic structures; 3) the material underwent various competing magnetic interactions.…”

Section: Discussionmentioning

confidence: 99%

“…[102] Recently, Hou et al observed stable skyrmionic bubbles above room temperature in centrosymmetric magnets REMn 2 Ge 2 (RE ¼ Ce, Pr, Nd) (Figure 6). [103] REMn 2 Ge 2 compounds have the I4/mmm space group, and the T C of CeMn 2 Ge 2 , PrMn 2 Ge 2 , and NdMn 2 Ge 2 is %310, 320, and 330 K, respectively. The size of skyrmionic bubbles in REMn 2 Ge 2 (RE ¼ Ce, Pr, and Nd), as observed via LTEM, was 320-250 nm at room temperature.…”

Section: Centrosymmetric Magnetmentioning

confidence: 99%

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Recent Progress in Exploring the Magnetic Solids with Room‐Temperature Skyrmionic Spin Configurations

2021

Physica Status Solidi (a)

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Magnetic materials with skyrmionic spin configurations have been widely investigated in recent years owing to their promising applications for magnetic memory storage and logic circuits. Considering their practical applications, room‐temperature skyrmion‐hosting magnetic materials shall be investigated comprehensively. The characteristics of magnetic skyrmions are closely associated with the physical properties of the host magnetic materials. The symmetry of the crystal structure, magnetic order temperature, and geometric shape of magnetic materials significantly affect the formation and annihilation of magnetic skyrmions. In addition to the intrinsic properties of materials, detection methods are vital to the investigation of new materials. Herein, the techniques for detecting magnetic skyrmions are briefly summarized, and the results of room‐temperature magnetic skyrmion hosting magnetic solids (the artificial materials are not included) with different topological characteristics from recent years are presented.

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Section: Discussionmentioning

confidence: 99%

Section: Centrosymmetric Magnetmentioning

confidence: 99%

Recent Progress in Exploring the Magnetic Solids with Room‐Temperature Skyrmionic Spin Configurations

2021

Physica Status Solidi (a)

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“…The ternary RE-based intermetallic compounds with a general composition of RETM 2 X 2 (TM = 3d transition metals; X = P, As, Si, Ge), which mainly crystallize in the layered ThCr 2 Si 2 -type crystal structure belonging to the space group I4/mmm, have attracted considerable research interest in recent years [26][27][28][29][30][31][32]. Depending on the consistent elementals, various physical properties, such as superconductivity, multilevel MPTs, heavy-fermion behavior, promising thermoelectric performance, and large/giant MC effects, have been observed [26][27][28][29][30][31][32]. The CeCu 2 Si 2 is the first heavy-fermion superconductor that has shown a multiband behavior and unexpected deficiency of nodal quasiparticles [26,27].…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties and promising magnetocaloric performances in the antiferromagnetic GdFe2Si2 compound

et al. 2022

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The magnetocaloric (MC) effect-based solidstate magnetic refrigeration (MR) technology has been recognized as an alternative novel method to the presently commercialized gas compression technology. Searching for suitable candidates with promising MC performances is one of the most urgent tasks. Herein, combined experimental and theoretical investigations on the magnetic properties, magnetic phase transition, and cryogenic MC performances of GdFe 2 Si 2 have been performed. An unstable antiferromagnetic (AFM) interaction in the ground state has been confirmed in GdFe 2 Si 2 . Moreover, a huge reversible cryogenic MC effect and promising MC performances in GdFe 2 Si 2 have been observed. The maximum isothermal magnetic entropy change, temperature-averaged entropy change with 2 K lift, and refrigerant capacity for GdFe 2 Si 2 were 30.01 J kg −1 K −1 , 29.37 J kg −1 K −1 , and 328.45 J kg −1 at around 8.6 K with the magnetic change of 0-7 T, respectively. Evidently, the values of these MC parameters for the present AFM compound GdFe 2 Si 2 are superior to those of most recently reported rareearth-based MC materials, suggesting the potential application for active cryogenic MR.

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“…Giant magnetoresistance (GMR) was observed in REMn 2 Ge 2 (RE = La, Sm), [5][6][7] magnetocaloric (MC) behavior in REMn 2 Si 2 (RE = Ho, Er, Tb) [8-10] and REMn 2 Ge 2 (RE = Ce, Tb) [11,12] and skyrmionic bubbles in REMn 2 Ge 2 (RE = Ce, Pr, Nd). [13] Recently, LaMn 2 Ge 2 has been shown to demonstrate a topological Hall effect (THE). [14] The wide range of behavior exhibited by the REMn 2 X 2 materials is related to the rich diversity of collinear and non-collinear magnetic states that can be realized in this atomic arrangement.…”

Section: Introductionmentioning

confidence: 99%

Magnetic phase diagram of the solid solution LaMn2(Ge1-xSix)2 (0 ≤ x ≤ 1) unraveled by powder neutron diffraction

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Ovchinnikov

et al. 2022

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The structural and magnetic properties of the ThCr2Si2-type solid solution LaMn2(Ge1−xSix)2 (x = 0.0 to 1.0) have been investigated employing a combination of X-ray diffraction, magnetization and neutron diffraction measurements, which allowed establishing a magnetic composition-temperature phase diagram. Substitution of Ge by Si leads to a compression of the unit cell, which affects the magnetic exchange interactions. In particular, the magnetic structure of LaMn2(Ge1−xSix)2 is strongly affected by the unit cell parameter c, related to the separation of adjacent Mn layers. Commensurate antiferromagnetic layers and a canted ferromagnetic structure dominate the Si-rich part of the solid solution, whilst an incommensurate antiferromagnetic flat spiral and a conical magnetic structure are observed in the Si-poor part.

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Emergence of room temperature stable skyrmionic bubbles in the rare earth based REMn2Ge2 (RE = Ce, Pr, and Nd) magnets

Cited by 42 publications

References 43 publications

Recent Progress in Exploring the Magnetic Solids with Room‐Temperature Skyrmionic Spin Configurations

Recent Progress in Exploring the Magnetic Solids with Room‐Temperature Skyrmionic Spin Configurations

Magnetic properties and promising magnetocaloric performances in the antiferromagnetic GdFe2Si2 compound

Magnetic phase diagram of the solid solution LaMn2(Ge1-xSix)2 (0 ≤ x ≤ 1) unraveled by powder neutron diffraction

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