Critical behavior and magnetocaloric effect of the ferromagnetic Weyl semimetal candidate Co2−ZrSn single crystals

Yang, Xiukang; Pan, Junxiao; Sun, Kexi; Shi, Yongpeng; Cao, Leiming; Liu, Shijiang; Gai, Wei‐Zhuo; Chu, Dongliang; Yang, Mei

doi:10.1016/j.jallcom.2021.161118

Cited by 9 publications

(4 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The plots exhibit broad peaks centered around PM-FM transition T C = 101 K and the peak values monotonically increases with increasing field, reaches maximums 2.1 (1.8) J kg –1 K –1 under a field of 5 T applied in ab plane ( c -axis). Furthermore, there exists a tiny shift of the – Δ S M max peak from 101 K to near 102 K with an increasing of magnetic field from 0.5 to 5 T, excluding the mean-field model, , consistent with the above critical behavior analysis. Remarkably, below T = 55 K negative values of MCE are observed under H // ab , which is opposite to that of ordinary ferromagnetic systems with a positive MCE.…”

Section: Resultssupporting

confidence: 83%

Magnetic Properties of the Hexagonal Ferromagnet NdCrGe₃ Showing Metamagnetic Transition and Negative Magnetocaloric Effect

et al. 2021

Self Cite

View full text Add to dashboard Cite

Single crystals of a hexagonal ferromagnet NdCrGe 3 with one-dimensional crystal structure are synthesized, and the magnetic properties are comprehensively investigated, exhibiting large magnetic anisotropy and complex magnetic structure. Besides the ferromagnetic transition at T C = 101 K, we observe a sharp decrease in magnetization at T = 55 K and another two phase transitions at T = 31 and 15 K. These phase transitions imply complex and anisotropic magnetic structure in NdCrGe 3 . Below T = 55 K, metamagnetic transitions and negative magnetocaloric effects are detected under H//ab. Additionally, the critical properties around T C = 101 K and the anisotropic magnetocaloric effect are investigated in detail.

show abstract

Section: Resultssupporting

confidence: 83%

Magnetic Properties of the Hexagonal Ferromagnet NdCrGe₃ Showing Metamagnetic Transition and Negative Magnetocaloric Effect

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, the position of the peaks gradually transfer to higher temperatures with an increasing of applied magnetic fields, which eliminates the mean-field model [79][80][81], consistent with the above analyses on critical behavior. −ΔS M (T, H) reaches to a maximal value of 1.18 J kg −1 K −1 at μ 0 H = 5 T, the value is comparable with that of typical systems with a second-order FM transition [51,82,83]. Except for −ΔS M , another crucial parameter to characterize the potential importance of the magnetocaloric effect of systems is the RCP [84], which equals −ΔS max represents the maximal value of the −ΔS M , δ FWHM is the full width at half maximal value of −ΔS M (T).…”

Section: Magnetic Entropy Changesupporting

confidence: 59%

“…Since the Arrott plots can not appropriately describe the magnetization in Co 7 Zn 8 Mn 5 , the modified Arrott plots (MAP) are utilized to characterize the M(H) curves. For systems with a second-order FM transition, the spontaneous magnetization (M s ) below T C , the M(H) curve at T C , and the initial magnetic susceptibility (χ −1 0 ) above T C are depicted by various critical exponents β, δ, and γ, respectively [47,48], To achieve proper critical exponents, an iterative way is utilized to determine the MAP [49][50][51][52], which successfully generates a series of parallel lines in the high-field region (figure 6(b)). Linearly extrapolated M s and χ −1 0 as a function of temperature are displayed in figure 7(a).…”

Section: Critical Behaviormentioning

confidence: 99%

Critical behavior and magnetic entropy change of skyrmion host Co₇Zn₈Mn₅

Yang

Pan

et al. 2022

New J. Phys.

Self Cite

View full text Add to dashboard Cite

The magnetic properties of a β-Mn-type alloy Co7Zn8Mn5, which is a chiral magnet hosting skyrmion phase, are comprehensively investigated, exhibiting a ferromagnetic transition around 184 K and a spin freezing near 20 K. The generated Rhodes-Wolfarth ratio (RWR) equals 1.10, which indicates a weak itinerant character of the ferromagnetism in Co7Zn8Mn5. The spin dynamics of the spin freezing agrees with the universal scaling law of critical slowing down with τ0 = 1.7 × 10−5 s, Tg = 20.2 K, and zν = 3.92. Critical exponents β = 0.423(1) and γ = 1.366(4) are deduced by the modified Arrott plot, whereas δ = 4.22(2) is obtained by a critical isotherm analysis. The validity of the deduced critical exponents is verified by the Widom scaling relation and the scaling hypothesis. The boundary between the first-order and the second-order phase transition is evaluated by a scaling analysis. The magnetic interaction, obtained by a renormalization group theory, decays with distance r as J(r) ≈ r−4.9 , lying between the mean-field model and the 3D Heisenberg model. The analyses on critical behavior could shed new light on the origin of ferromagnetism and topological Hall effect. Moreover, the magnetic entropy change −∆SM exhibits a maximal value around TC , and the peak position gradually raises with an increasing fields, eliminating the mean-field model. The −∆SM max features a power-law behavior with n > 2/3, excluding any universal standard models of ferromagnetism. The −∆SM(T,H) plots can be scaled into a universal curve, further verifying the reliability and accuracy of the yielded critical exponents.

show abstract

“…The value of both m and n indicates the second-order magnetic phase transition in the sample. [94][95][96][97] The heat capacity (ΔC p ) has been calculated using the following relation:…”

mentioning

confidence: 99%

Structure, Electronic, Optical, Magnetic and Magnetocaloric Properties of Sm₂CuMnO₆ Double Perovskite Nanomaterial

Saha,

Barman,

Roy

et al. 2024

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

This study explores the structural, microstructural, optical, and magnetic characteristics of double perovskite oxide Sm2CuMnO6. The sample is prepared in the monoclinic phase with space group P21/n using the auto-combustion method. The crystal structure exhibits distortion and tilting. First-principles calculations are conducted using the density-functional theory framework, focusing on electronic structures and density of states. The average crystallite size, particle size and grain size of the sintered sample are 34.42 nm, 36.15 nm and 475 nm respectively. The sample exhibits a direct band gap energy of 1.96 eV. Analysis of the X-ray photoelectron spectra indicates the presence of Sm3+, Cu2+, and Mn3+/Mn4+ ions in the sample. The DC magnetization study reveals a Curie temperature (Tc) of 50 K for the sample. A non-metallic state resembling a spin glass is detected below 15 K, arising from the competition between antiferromagnetic and ferromagnetic interactions. The maximum value of isothermal magnetic entropy, the relative cooling power and heat capacity are 1.4 J.kg–1.K–1, 100.2 J.kg–1, and 1.35 J.kg–1.K–1 at a field change of 70 kOe respectively. The value of Temperature Averaged Entropy Change is 1.36 J.kg-1.K-1 and 1.29 J.kg-1.K-1 for a temperature span of 10 K and 40 K at a field change of 70 kOe.

show abstract

Critical behavior and magnetocaloric effect of the ferromagnetic Weyl semimetal candidate Co2−ZrSn single crystals

Cited by 9 publications

References 44 publications

Magnetic Properties of the Hexagonal Ferromagnet NdCrGe₃ Showing Metamagnetic Transition and Negative Magnetocaloric Effect

Magnetic Properties of the Hexagonal Ferromagnet NdCrGe₃ Showing Metamagnetic Transition and Negative Magnetocaloric Effect

Critical behavior and magnetic entropy change of skyrmion host Co₇Zn₈Mn₅

Structure, Electronic, Optical, Magnetic and Magnetocaloric Properties of Sm₂CuMnO₆ Double Perovskite Nanomaterial

Contact Info

Product

Resources

About

Critical behavior and magnetocaloric effect of the ferromagnetic Weyl semimetal candidate Co2−ZrSn single crystals

Cited by 9 publications

References 44 publications

Magnetic Properties of the Hexagonal Ferromagnet NdCrGe3 Showing Metamagnetic Transition and Negative Magnetocaloric Effect

Magnetic Properties of the Hexagonal Ferromagnet NdCrGe3 Showing Metamagnetic Transition and Negative Magnetocaloric Effect

Critical behavior and magnetic entropy change of skyrmion host Co7Zn8Mn5

Structure, Electronic, Optical, Magnetic and Magnetocaloric Properties of Sm2CuMnO6 Double Perovskite Nanomaterial

Contact Info

Product

Resources

About

Magnetic Properties of the Hexagonal Ferromagnet NdCrGe₃ Showing Metamagnetic Transition and Negative Magnetocaloric Effect

Magnetic Properties of the Hexagonal Ferromagnet NdCrGe₃ Showing Metamagnetic Transition and Negative Magnetocaloric Effect

Critical behavior and magnetic entropy change of skyrmion host Co₇Zn₈Mn₅

Structure, Electronic, Optical, Magnetic and Magnetocaloric Properties of Sm₂CuMnO₆ Double Perovskite Nanomaterial