Griffith-Like Phase in Co-Substituted La0.7Sr0.3MnO3

Ngan, L.T.T.; Nam, Phạm Hồng; Dang, Nguyen Van; Nguyên, Lưu Hữu; Phong, P.T.

doi:10.1007/s11661-019-05313-x

Cited by 7 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where C is the Curie's constant (in CGS units it is equal to N A µ 2 eff µ 2 B /3k B where N A is Avogadro's number, µ eff the effective paramagnetic moment, µ B the Bohr magneton, and k B the Boltzman's constant and the Curie-Weiss temperatures, θ CW , correspond to the intersection points of linear fit lines and χ −1 = 0. For all samples, inverse susceptibility, χ −1 (T), shows an external field dependent behavior, which implies the formation of short-range ferromagnetic clusters above T C [4,[28][29][30]; figures 5(e) and (f) show the case for x = 0.0 and x = 0.09. These results are the mean indication of the presence of the Griffith phase (GP) in our samples.…”

Section: Magnetic Propertiesmentioning

confidence: 95%

Short-range magnetic behavior in manganites La_0.93K_0.07Mn_1- _x Cu _x O₃ (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

Khammassi¹,

López²,

Chérif³

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Manganites La0.93K0.07Mn1−x Cu x O3 ( 0.0 ⩽ x ⩽ 0.09 ) , prepared by the solid state reaction method at high temperature, were studied structurally and magnetically. The unit cell parameters, as well as bond length d ( Mn,Cu)-O Å and the bond angle θ ( Mn,Cu)- O 1 -Mn , were determined from the Rietveld refinement of the x-ray diffraction patterns. The Fourier-transform infrared spectroscopy analysis shows that Cu2+ substitution induces variations in the vibration modes of the MnO6 octahedra. Magnetization vs. temperature M T at low magnetic field H=0 .01T were performed in the range

show abstract

Section: Magnetic Propertiesmentioning

confidence: 95%

Short-range magnetic behavior in manganites La_0.93K_0.07Mn_1- _x Cu _x O₃ (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

Khammassi¹,

López²,

Chérif³

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…In the GP region, T C < T < T G , the inverse of the magnetic susceptibility can be described by the power law [44,45] given by eq. ( 9).…”

Section: 𝐂 = (𝐍𝛍 𝐞𝐟𝐟mentioning

confidence: 99%

On the magnetotransport properties and Griffith phase in (La,Gd)1.4 (Ca,Sr)1.6 Mn2 O7 the double layered manganites

Belguet

Mahamdioua

Meriche

et al. 2023

Preprint

View full text Add to dashboard Cite

The bilayered manganite with formula \({ \text{L}\text{a}}_{1.2}{\text{G}\text{d}}_{0.2}{\text{C}\text{a}}_{1.2}{\text{S}\text{r}}_{0.4}{\text{M}\text{n}}_{2}{\text{O}}_{7}\)has been synthesized by the solid state reaction route with the aim of studying its structural, microstructural, magnetic, electrical and magnetotransport properties. The X-ray diffraction patterns have been analyzed by Rietveld refinement. It revealed that the sample crystallized in a tetragonal structure with the space group I4/mmm and that, as an impurity phase, there were traces of an orthorhombic structure corresponding to a simple perovskite with the space group Pnma. The morphology was examined by using scanning electron microscopy, which revealed that it was porous and granular. The presence and purity of all the constituent elements were confirmed by the Energy Dispersive X-ray spectroscopy investigation. Based on magnetization, the inverse of susceptibility, and hysteresis loop, the magnetic behavior of the compound is discussed in detail. The sample displays a phase transition from ferromagnetic (FM) to paramagnetic (PM) at \({\text{T}}_{\text{C}}\), which was determined to be 290.13 K. Between 305 and 360 K, a Griffith phase (GP) was discovered, indicating the existence ofFM clusters in the paramagnetic domains, and the Griffithtemperature was found to be\(\)339 K. The sample can be thought of as spin-glass-like manganite since a significant divergence wasobserved at low temperatures between the magnetization curves M (T) in the zero-field cooling (ZFC) and field cooling (FC) modes. The spin-glass transition temperature was found to be 261 K. The electrical resistivity under both 0 and 1 T magnetic field exhibits metal-to-insulator transition at \({\text{T}}_{\text{M}\text{I}}\) = 152.98 K. The magnetoresistance was observed to decrease with increasing temperature, peaking at 23% at 11 K under 1 T. Total resistivity in magnetic applied fields of 0T and 1T is composed of residual resistivity, weak localization, and electron-electron combinations below \({\text{T}}_{\text{M}\text{I}}\). Above\({\text{T}}_{\text{M}\text{I}}\) and\({{\theta }}_{\text{D}}/2\) (\({{\theta }}_{\text{D}}\)is Debye temperature), the Mott’s 3D variable range hopping mechanism (3D-VRH) governed the electrical conduction, whereas, the adiabatic small polaron hopping model governed it in the range\({{\theta }}_{\text{D}}/2>\text{T}>300\text{K}\). The density of states, mean hopping energy, and mean hopping distance have all been estimated and thoroughly discussed.

show abstract

“…Experimental investigations of GP have been conducted in various systems, including manganites [27][28][29], cobaltites [30,31], double perovskites [32,33], and several other materials [34,35]. GP originates from many different causes, such as structural disorder resulting from the introduction of dopant elements at different sites of the material [30,31], Jahn-Teller distortion [27][28][29], and grain size variation [27,28].…”

Section:  mentioning

confidence: 99%

Correlation between critical magnetic behavior and griffiths phase in ferromagnetic La_0.7Sr_0.3Mn_1−xFe_xO₃ (x = 0.05) nanoparticle

Thanh,

Van Quynh,

Thi Ngoc Nha

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

The magnetic behavior of the La0.7Sr0.3Mn0.95Fe0.05O3 nanoparticles was investigated. X-ray diffraction analysis revealed that this sample exhibited rhombohedral symmetry with R3-c space group. The sample underwent a ferromagnetic-paramagnetic transition at approximately 290 K, characterized by a second-order phase transition. Interestingly, the state above the transition temperature is not purely paramagnetic but rather exhibits a short-range ferromagnetic order or Griffiths phase, which becomes more pronounced as the temperature increases up to the Griffiths transition temperature (∼345 K). The values of the critical exponents obtained in this study, β = 0.671, γ = 1.087, and δ = 2.612, with TC = 290.09 K, are distinct from those of any known universality class, and are confirmed by a single scaling equation of state. This unusual behavior is ascribed to the existence of the Griffiths phase, which reflects the unconventional critical behavior of magnetic susceptibility. In addition to conventional magnetic measurements, detailed studies of isothermal magnetization and magnetocaloric effects have been performed, and theoretical analyses have been utilized to further explore the Griffiths phase. Furthermore, a correlation between the Griffiths phase and the anomalous critical parameters was established.

show abstract

Griffith-Like Phase in Co-Substituted La0.7Sr0.3MnO3

Cited by 7 publications

References 26 publications

Short-range magnetic behavior in manganites La_0.93K_0.07Mn_1- _x Cu _x O₃ (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

Short-range magnetic behavior in manganites La_0.93K_0.07Mn_1- _x Cu _x O₃ (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

On the magnetotransport properties and Griffith phase in (La,Gd)1.4 (Ca,Sr)1.6 Mn2 O7 the double layered manganites

Correlation between critical magnetic behavior and griffiths phase in ferromagnetic La_0.7Sr_0.3Mn_1−xFe_xO₃ (x = 0.05) nanoparticle

Contact Info

Product

Resources

About

Griffith-Like Phase in Co-Substituted La0.7Sr0.3MnO3

Cited by 7 publications

References 26 publications

Short-range magnetic behavior in manganites La0.93K0.07Mn1- x Cu x O3 (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

Short-range magnetic behavior in manganites La0.93K0.07Mn1- x Cu x O3 (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

On the magnetotransport properties and Griffith phase in (La,Gd)1.4 (Ca,Sr)1.6 Mn2 O7 the double layered manganites

Correlation between critical magnetic behavior and griffiths phase in ferromagnetic La0.7Sr0.3Mn1−xFexO3 (x = 0.05) nanoparticle

Contact Info

Product

Resources

About

Short-range magnetic behavior in manganites La_0.93K_0.07Mn_1- _x Cu _x O₃ (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

Short-range magnetic behavior in manganites La_0.93K_0.07Mn_1- _x Cu _x O₃ (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

Correlation between critical magnetic behavior and griffiths phase in ferromagnetic La_0.7Sr_0.3Mn_1−xFe_xO₃ (x = 0.05) nanoparticle