Critical scaling and magnetic phase diagram of bi-skyrmion host quasi-two-dimensional La1.37Sr1.63Mn2O7 bi-layer manganite

Tiwari, Jeetendra Kumar; Kumar, Birendra; Chauhan, Harish Chandr; Ghosh, Subhasis

doi:10.1016/j.jmmm.2021.168020

Cited by 4 publications

(2 citation statements)

References 70 publications

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“…Required stoichiometric ratio of these precursors for BL-LSMO-0.3 and IL-LSMO-0.3 were mixed homogeneously by grinding. The BL-LSMO-0.3 was calcined at 1050 C for 48 h and sintered at 1400 C for 36 h. Similarly, IL-LSMO-0.3 was calcined at 1050 C for 24 h and sintered at 1400 C for 15 h. The final step was repeated to obtain the single phase of the samples 65 , 66 . All the reaction process takes place in the air at ambient pressure so that samples be prepared in the proper stoichiometric ratio.…”

Section: Methodsmentioning

confidence: 99%

Multiple magnetic phase transitions with different universality classes in bilayer La$$_{1.4}$$Sr$$_{1.6}$$Mn$$_{2}$$O$$_7$$ manganite

Kumar

Tiwari

Chauhan

et al. 2021

Sci Rep

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Here, we report three magnetic transitions at 101 K (T$$_{C1}$$ C 1 ), 246 K (T$$_{C2}$$ C 2 ) and 295 K (T$$_{C3}$$ C 3 ) in bilayer La$$_{1.4}$$ 1.4 Sr$$_{1.6}$$ 1.6 Mn$$_{2}$$ 2 O$$_7$$ 7 . The second order phase transitions have been identified at these transition points with the help of change in entropy analysis and modified Arrott plots (MAPs). The critical behavior around T$$_{C1}$$ C 1 , T$$_{C2}$$ C 2 and T$$_{C3}$$ C 3 have been studied by MAPs and Kouvel–Fisher method. Based on these analyses four magnetic phases are: (1) 2D Ising ferromagnetic (FM) below T$$_{C1}$$ C 1 ,(2) 2D Heisenberg canted antiferromagnetic (CAFM-I) and FM clusters in temperature range T$$_{C1}$$ C 1 < T < T$$_{C2}$$ C 2 , (3) 2D Heisenberg CAFM-II and FM clusters with non magnetically interacting planes in temperature range T$$_{C2}$$ C 2 < T < T$$_{C3}$$ C 3 and (4) paramagnetic for T > T$$_{C3}$$ C 3 .

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Section: Methodsmentioning

confidence: 99%

Multiple magnetic phase transitions with different universality classes in bilayer La$$_{1.4}$$Sr$$_{1.6}$$Mn$$_{2}$$O$$_7$$ manganite

Kumar

Tiwari

Chauhan

et al. 2021

Sci Rep

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“…Generally, skyrmions are observed in centrosymmetric and noncentrosymmetric magnetic materials in a small window of applied field and temperature 1 , 2 , 4 , 11 . In centrosymmetric systems, magnetic bubbles, which are topologically equivalent to skyrmion phase, emerge due to competition between symmetric exchange interaction (SEI) and dipole-dipole interaction 12 , 13 , 18 , 19 under external magnetic field. So, it is important to study the nature of SEI, i.e , whether it is Heisenberg type, Ising type or some other type.…”

Section: Introductionmentioning

confidence: 99%

Origin of metamagnetism in skyrmion host Cu$$_2$$OSeO$$_3$$

Chauhan

Kumar

Ghosh

2022

Sci Rep

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Skyrmion host chiral Cu$$_2$$ 2 OSeO$$_3$$ 3 has attracted researchers due to several intriguing properties. Observation of metamagnetism in low-temperature and low-field makes the magnetic properties of Cu$$_2$$ 2 OSeO$$_3$$ 3 more complex. Here, we present an investigation on metamagnetism in Cu$$_2$$ 2 OSeO$$_3$$ 3 by analyzing its structural and magnetic properties. Study of magnetic properties reveal spin-flip of one of the Cu$$^{2+}$$ 2 + ions, embedded in square pyramidal CuO$$_5$$ 5 polyhedra, due to the development of strain in low-temperature and low-field regime. The spin-flip is found to be the main reason for field-induced first-order metamagnetic transition. Magnetic phase diagram of Cu$$_2$$ 2 OSeO$$_3$$ 3 has been constructed with the help of magnetization analyses. It is argued that the metamagnetic hysteretic field region may be low-temperature skyrmion phase with additional spiral and tilted-conical phases. A tricritical point has been observed in the phase diagram at which first-order metamagnetic hysteretic field range ceases to exist.

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Topological Spin Textures in Magnetic Materials

Tiwari

2024

Engineering Materials

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Critical scaling and magnetic phase diagram of bi-skyrmion host quasi-two-dimensional La1.37Sr1.63Mn2O7 bi-layer manganite

Cited by 4 publications

References 70 publications

Multiple magnetic phase transitions with different universality classes in bilayer La$$_{1.4}$$Sr$$_{1.6}$$Mn$$_{2}$$O$$_7$$ manganite

Multiple magnetic phase transitions with different universality classes in bilayer La$$_{1.4}$$Sr$$_{1.6}$$Mn$$_{2}$$O$$_7$$ manganite

Origin of metamagnetism in skyrmion host Cu$$_2$$OSeO$$_3$$

Topological Spin Textures in Magnetic Materials

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