The structural and magnetic ordering in La0.5−Nd Ca0.5MnO3 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0013.gif" overflow="scroll"><mml:mo stretchy="false">(</mml:mo><mml:mn>0.1</mml:mn><mml:mo>≤</mml:mo><mml:mi>x</mml:mi><mml:mo>≤</mml:mo><mml:mn>0.5</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> manganites

Dhiman, Indu; Das, Anath Bandhu; Mishra, Prerna; Lalla, N. P.; Kumar, Amit

doi:10.1016/j.jmmm.2010.10.039

Cited by 24 publications

(2 citation statements)

References 63 publications

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“…Generally, rare-earth-doped manganite show a decrease in Curie temperature (T C ) with a reduction in the average ionic radius of A site 〈r A 〉 while keeping constant the Mn 3+ /Mn 4+ ratio [18,19]. The value of T C also decreases with the increase of cationic disorder [20,21], which can be seen as a Jahn-Tellertype pre-deformation of the unit cell leading to the localization of the Mn 3+ e .g. electrons [22].…”

Section: Introductionmentioning

confidence: 99%

Magnetic effect and chemical distribution study of LCMNO₃ perovskite by photoelectron spectroscopy

Smari,

Moualhi,

Tong

et al. 2024

Phys. Scr.

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The crystal structure, XPS, magnetic characteristics, and magnetocaloric performance of perovskite La0.55Ca0.45Mn0.8Nb0.2O3(LCMNO) ceramic powder were analyzed. The orthorhombic structure with a Pnma space group was found as the main phase in the as-received compound after the XRD pattern refinement. The mixed-valence states of manganese were detected by X-ray photoemission spectroscopy (XPS). The analysis of the La3d line revealed the complex nature of the lanthanum states. The evaluation of ZFC and FC magnetization performance provided conclusive evidence for the existence of the antiferromagnetic Mn3O4 phase at a temperature of TN= 42K and the coexistence of CO- AFM and FM domains in LCNMO. Despite the observed significant (δTFWHM) value due to relatively low magnetic entropy change (SM), the relative cooling power (RCP) is relatively moderate. By adding Nb4+, the changes in Mn valences and their effect on the magnetic cooling effect are lessened.

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Section: Introductionmentioning

confidence: 99%

Magnetic effect and chemical distribution study of LCMNO₃ perovskite by photoelectron spectroscopy

Smari,

Moualhi,

Tong

et al. 2024

Phys. Scr.

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“…The La 1-x Ca x MnO 3 has a rich phase diagram where the doping level x and the temperature determine the presence of paramagnetic, ferromagnetic, antiferromagnetism, orbital and charge ordering. The half doped perovkite manganites Ln 0.5 A 0.5 MnO 3 (Ln=rare earth, A= alkaline earth) attract great attention because they display rich physics including charge ordering (CO) and orbital ordering OO [6][7][8][9][10][11][12]. Investigations of charge ordering in the rare earth manganites have revealed extraordinary variety in the physical properties including their sensitivity to external factors such as the average size of the A-cation site, magnetic and electrical fields, hydrostatic pressure, as well as isotropic and chemical substitution [6,13,14].…”

Section: Introductionmentioning

confidence: 99%

Europium substitution effects on structural, magnetic and magnetocaloric properties in La_0.5Ca_0.5MnO₃

Krichene

Boujelben

Cheikhrouhou

2012

EPJ Web of Conferences

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Abstract. We have investigated structural, magnetic and magnetocaloric properties of polycrystalline samples La 0.5-x Eu x Ca 0.5 MnO 3 (x=0 and 0.1). Rietveld refinement of the X-ray diffraction patterns show that our samples are single phase and crystallize in the orthorhombic structure with Pnma space group. Magnetization measurements versus temperature at a magnetic applied field of 500 Oe indicate that La 0.4 Eu 0.1 Ca 0.5 MnO 3 sample exhibits a paramagnetic to ferromagnetic transition with decreasing temperature.

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Study of the Effects of A‐Site La‐Substition on the Electrical and Magnetic Properties of Dy_0.5Sr_0.5MnO₃ Ceramics

Shi

Zhao

et al. 2017

Physica Status Solidi (b)

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The Dy0.5−xLaxSr0.5MnO3 (0 ≤ x ≤ 0.4) manganite compounds have been synthesized by solid state reaction, and the effect of nonmagnetic La ion doping on the crystal structure, electrical and magnetic properties are systematically investigated. It is found that with successive substitution of La element, A‐site cationic arrangement transforms from disorder (random, x ≤ 0.25) to order structure (x > 0.25), and the crystal structure undergoes a transition from cubic to orthogonal distorted perovskite structure. When 0 ≤ x < 0.25, the compounds show a similar semiconducting behavior and magnetic property with a low‐temperature spin‐glass state. When x = 0.25, however, long‐range ferromagnetic (FM) order begins to form and coexists with anti‐ferromagnetic (AFM) phase in the compound. When x further increases, FM interactions strengthen and become predominant in the magnetic properties of the compound. On the other hand, in contrast to the semiconducting behavior of the compounds with x ≤ 0.25, when x > 0.25, the resistivity decreases quickly in the corresponding temperature range. It is suggested that not only the A‐site cationic disorder turning, closely related to the cation radius distribution (mismatch), σ2, controlled by A‐site cation radius 〈rA〉, but the substitution of nonmagnetic La ions, or A‐site magnetic change, is an effective way to adjust the crystal structure and the related magnetic and electrical properties of the perovskite manganite oxides for the applications.

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The structural and magnetic ordering in La0.5−Nd Ca0.5MnO3 (0.1≤x≤0.5) manganites

Cited by 24 publications

References 63 publications

Magnetic effect and chemical distribution study of LCMNO₃ perovskite by photoelectron spectroscopy

Magnetic effect and chemical distribution study of LCMNO₃ perovskite by photoelectron spectroscopy

Europium substitution effects on structural, magnetic and magnetocaloric properties in La_0.5Ca_0.5MnO₃

Study of the Effects of A‐Site La‐Substition on the Electrical and Magnetic Properties of Dy_0.5Sr_0.5MnO₃ Ceramics

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The structural and magnetic ordering in La0.5−Nd Ca0.5MnO3 (0.1≤x≤0.5) manganites

Cited by 24 publications

References 63 publications

Magnetic effect and chemical distribution study of LCMNO3 perovskite by photoelectron spectroscopy

Magnetic effect and chemical distribution study of LCMNO3 perovskite by photoelectron spectroscopy

Europium substitution effects on structural, magnetic and magnetocaloric properties in La0.5Ca0.5MnO3

Study of the Effects of A‐Site La‐Substition on the Electrical and Magnetic Properties of Dy0.5Sr0.5MnO3 Ceramics

Contact Info

Product

Resources

About

Magnetic effect and chemical distribution study of LCMNO₃ perovskite by photoelectron spectroscopy

Magnetic effect and chemical distribution study of LCMNO₃ perovskite by photoelectron spectroscopy

Europium substitution effects on structural, magnetic and magnetocaloric properties in La_0.5Ca_0.5MnO₃

Study of the Effects of A‐Site La‐Substition on the Electrical and Magnetic Properties of Dy_0.5Sr_0.5MnO₃ Ceramics