Effect of Ti substitution on structural, magnetic and magnetocaloric properties in double perovskites Gd2NiMn1-Ti O6 (0 ≤ x ≤ 1)

Li, Canglong; Zheng, Shuangshuang; Yang, Qiu; Lei, Qiankun; Wang, Chunlei; Lu, Yang; Yang, Ya; Yan, Hailong; Luo, Yong

doi:10.1016/j.ceramint.2022.10.091

Cited by 11 publications

(3 citation statements)

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“…Therefore, the magnetic moments provide by other FM clusters that are antiparallel to H due to the negative exchange coupling, so as to significantly reduce the net magnetic moments when the temperature lies in the range T comp ≤ T < T peak . The sharp decrease in net magnetic moments has also been observed in other Gd‐based DPs 19,35,36 . Both Gd 2 CoMnO 6 and Gd 2 Co 0.5 Mn 1.5 O 6 display FM transition at T C and AFM transition at T N .…”

Section: Resultssupporting

confidence: 60%

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Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd₂Co_0.5Mn_1.5O₆ system

Yang

Zheng

et al. 2023

J Am Ceram Soc.

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Experiments for orthorhombic double perovskite Gd 2 Co 0.5 Mn 1.5 O 6 revealed intrinsic effects of magnetic compensation characterized by M(T comp ) = 0 at T comp = 20 K and negative magnetization depicted by M(T) < 0 under positive magnetic fields, which were experimentally investigated by different protocols of direct current magnetization measurements. Compared to Gd 2 CoMnO 6 , the excessive ratio of Mn in Gd 2 Co 0.5 Mn 1.5 O 6 promotes the antisite disorder and preferably generates magnetic clusters owing to the intrinsic inhomogeneity. The clusters exhibit spin glass (SG) properties as demonstrated by alternating current susceptibility and aging measurements. A possible physical mechanism for evolution of the spin configuration with temperature is proposed. The effects of magnetic compensation and negative magnetization are attributed to the negative exchange coupling among the abundant ferromagnetic clusters. The additional pinning force provided by the cluster SG is an essential factor to prevent the flipping of the spins from aligning with the applied magnetic field.

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Section: Resultssupporting

confidence: 60%

“…The sharp decrease in net magnetic moments has also been observed in other Gdbased DPs. 19,35,36 Both Gd 2 CoMnO 6 and Gd 2 Co 0.5 Mn 1.5 O 6 display FM transition at T C and AFM transition at T N . However, the sign of their low-temperature magnetization is completely opposite.…”

Section: Resultsmentioning

confidence: 99%

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd₂Co_0.5Mn_1.5O₆ system

Yang

Zheng

et al. 2023

J Am Ceram Soc.

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“…On the other hand, DP containing Co/Fe into the BB ′ site, for instance, (Er,Gd,Ho) 2 FeCoO 6 , , can exhibit FM order in the structure and enhance the MCE in a wide temperature range, with Δ S M and the relative cooling power (RCP) around 13–22 J/kg K and 280–346 J/kg (for magnetic fields in the range of 0–7 T), respectively. They outperform other DP compounds with different transition metals in the BB ′ site, such as (Gd,Dy,Ho) 2 (Cu,Cr,Ni)MnO 6 with Δ S M ∼ 7.8–9.2 J/kg K and RCP ∼ 122–160 J/kg. , The final features of the magnetically frustrated materials may be manipulated according to the degree of disorder and/or vacancies within their crystal structure. Such phenomena can be directly linked to magnetoelastic coupling, i.e., when the deviation of the lattice parameters from a monotonic behavior occurs, in the presence of a magnetic lattice, with temperature.…”

Section: Introductionmentioning

confidence: 99%

Magnetoelastic Coupling and Cryogenic Magnetocaloric Effect in Two-Site Disordered GdSrCoFeO₆ Double Perovskite

et al. 2023

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The development of new magnetic refrigerants demands an effective investigation of materials with a large magnetocaloric effect in a wide temperature range. Herein, we report on the structural, magnetic, and magnetocaloric properties of the two-site disordered double perovskite GdSrCoFeO 6 prepared by the modified solid-state synthesis method. Temperature-dependent synchrotron X-ray diffraction analysis revealed that GdSrCoFeO 6 crystallizes in the orthorhombic phase (Pnma), with Gd 3+ /Sr 2+ and Co 2+/3+ /Fe 3+/4+ ions randomly distributed on the A-and B-sites, respectively. An observed lattice parameter anomaly around 60 K indicates the occurrence of the magnetoelastic coupling, which coincides with the presence of ferro/ferrimagnetic (FM/FiM) ordering below T C ≈ 65 K from the magnetic measurements. These results match well with our first-principles calculation prediction of low-temperature magnetic (FM/FiM) and electronic (insulating/metal) transitions related to a combined effect of Co and Fe shortand long-range competitions, crossings of spin state at Co ions, and the hybridization degree between Gd-4f and Co-3d states. Additionally, a modified Arrott plot and Kouvel−Fisher analysis were used to establish the nature of the magnetic phase transition in GdSrCoFeO 6 , yielding the critical exponent β = 1.46(6)/1.45(6), γ = 1.48(5)/1.17(2), and δ = 2.01(3)/1.80(5), respectively. The specific heat analysis reveals two well-defined broad peaks (∼10 and ∼70 K), which match well with a Schottky anomaly (Gd-4f) and the magnetic transition of FM/FiM to paramagnetic order, respectively. The magnetocaloric effect (MCE) analysis reveals a maximum magnetic entropy change ΔS M max ≈ 13 J kg −1 K −1 (at ∼8 K) under a field of 0−7 T. These results evidence that the Schottky anomaly and the magnetoelastic coupling seem to be key factors for driving further enhancements to the MCE in GdSrCoFeO 6 , making it a possible candidate for cryogenic applications.

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Study of Optical, Magnetic, and Magnetocaloric Properties of Double Perovskites Dy2NiMnO6: First Principles Approach and Monte Carlo Simulations

Bessimou,

Masrour

2024

J Inorg Organomet Polym

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Effect of Ti substitution on structural, magnetic and magnetocaloric properties in double perovskites Gd2NiMn1-Ti O6 (0 ≤ x ≤ 1)

Cited by 11 publications

References 50 publications

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd₂Co_0.5Mn_1.5O₆ system

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd₂Co_0.5Mn_1.5O₆ system

Magnetoelastic Coupling and Cryogenic Magnetocaloric Effect in Two-Site Disordered GdSrCoFeO₆ Double Perovskite

Study of Optical, Magnetic, and Magnetocaloric Properties of Double Perovskites Dy2NiMnO6: First Principles Approach and Monte Carlo Simulations

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Effect of Ti substitution on structural, magnetic and magnetocaloric properties in double perovskites Gd2NiMn1-Ti O6 (0 ≤ x ≤ 1)

Cited by 11 publications

References 50 publications

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd2Co0.5Mn1.5O6 system

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd2Co0.5Mn1.5O6 system

Magnetoelastic Coupling and Cryogenic Magnetocaloric Effect in Two-Site Disordered GdSrCoFeO6 Double Perovskite

Study of Optical, Magnetic, and Magnetocaloric Properties of Double Perovskites Dy2NiMnO6: First Principles Approach and Monte Carlo Simulations

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Product

Resources

About

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd₂Co_0.5Mn_1.5O₆ system

Temperature‐induced magnetic compensation and negative magnetization in a cluster spin glass Gd₂Co_0.5Mn_1.5O₆ system

Magnetoelastic Coupling and Cryogenic Magnetocaloric Effect in Two-Site Disordered GdSrCoFeO₆ Double Perovskite