Investigation on structural, magneto-transport, magnetic and thermal properties of La0.8Ca0.2−xBaxMnO3 (0⩽x⩽0.2) manganites

Manjunatha, S.; Rao, Ashok; Subhashini,; Okram, G. S.

doi:10.1016/j.jallcom.2015.03.231

Cited by 58 publications

(4 citation statements)

References 40 publications

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“…These rare … (T MI ) of about 243 K. In case of T>T MI , the resisitivity as a function of temperature could be described by two different models, namely the variable range hopping (VRH) model or Arhenius model and the adiabatic small polaron hopping (ASPH) model but more in line with the second model (ASPH). The same results are also obtained by S. O. Manjunatha et al [3], for T>T MI samples more suited to adiabatic small polaron hopping (ASPH) model [6]. Z.…”

Section: Introduction supporting

confidence: 80%

“…are still intensively studied. Works focusing on various physical properties of the compounds, such as magnetoresistance (MR), crystal structure change, metal-insulator transition, specific heat, large magneto-caloric effect, and high electrical conductivity have been reported [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. These rare … (T MI ) of about 243 K. In case of T>T MI , the resisitivity as a function of temperature could be described by two different models, namely the variable range hopping (VRH) model or Arhenius model and the adiabatic small polaron hopping (ASPH) model but more in line with the second model (ASPH).…”

Section: Introduction mentioning

confidence: 99%

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The Effects of External Magnetic Field on the Physical Properties of La0.41Ca0.59Mn1-xCuxO3 with x = 0.06 and 0.15 in the Temperature Range of 100 – 300 K

et al. 2019

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This work investigated the crystal structure, resistivity and specific heat of La 0.41 Ca 0.59 Mn 1-x Cu x O 3 with x = 0.06 and 0.15. The samples were prepared by a solid reaction method and in milling with high energy milling (HEM) of 700 rpm for ten hours. Neutron scattering with high resolution powder diffraction (HRPD) is used to analyze the phase and crystal structure. For resistivity analysis, four point probes are used, and SQUID Quantum Design is used for specific heat analysis in temperatures range of 100 -300 K. In all cases, the sample has an orthorhombic crystal structure with a space group Pnma. The influence of a magnetic field on the specific heat and resistivity is also determined as a function of temperature. The resistivity increases in the presence of an external magnetic field. At the temperature less than 184 K, the resisitivity follows the Arhenius model (ln R varies as 1/T 0.25 ) while at higher temperatures it fits the metal-semiconductor model (ln R varies as 1/T). The electronic specific heat parameter γ varies with magnetic field at x = 0.06, but not at x = 0.15. earths manganite compounds have found a wide range of application, such as a mild hyperthermia mediator [1], magnetic refrigeration technology near room temperature [5], and a fuel cell cathode [7][8][9].Until now, the results of measurements and analysis of this material still make a lot of differences. Suppose La 1-x Sr x MnO 3 will change from orthorhombic (x<0.2) to rhombohedral (x>0.2) [1], at low temperatures, La 1-x Ca x MnO 3 structure will change from cubic to rhombohedral then to orthorhombic [2], while La 0.65 Ca 0.35-x Ba x MnO 3 has a rhombohedral crystal structure for x<0.15 and a cubic for 0.15

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Section: Introduction supporting

confidence: 80%

Section: Introduction mentioning

confidence: 99%

The Effects of External Magnetic Field on the Physical Properties of La0.41Ca0.59Mn1-xCuxO3 with x = 0.06 and 0.15 in the Temperature Range of 100 – 300 K

et al. 2019

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“…To study the electrical transport properties over all the temperature zones, particularly T z T MI , we analyzed the resistivity data in the competition mechanism by the phenomenological percolation model. 37 In the T z T MI zone, FM and PI coexist and compete with each other. The model takes into account the fact that the FM and PI regions are electrically coupled in series, 34,38 and also accounts for the contributions Table 2 .…”

Section: Rsc Advances Papermentioning

confidence: 99%

Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping

Dong

Sun

et al. 2019

RSC Adv.

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“…The electrical and magnetic properties are also affected by the avarage A-site cation radius < r A > and the A-site cation size mismatch [3,9]. Those induce distortion of MnO 6 octahedron thereby change the the distance and angle between Mn-O-Mn ions [10]. Moreover, a strong electron-phonon interaction arising from the Jahn-Teller splitting of the outer Mn d level [11] and the oxygen deficiency [12,13] play a role in the electrical and magnetic properties of lanthanum manganites.…”

Section: Introductionmentioning

confidence: 99%

The structural, morphological and magnetic properties of Ag-doped La_0.8Ca_0.2-xAg_xMnO₃ synthesized by sol-gel method

Ruli

Kurniawan²

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this paper, The authors report the structural, morphological and magnetic properties of La 0.8 Ca 0.2-x Ag x MnO 3 (x = 0, 0.03) prepared by sol-gel method. The X-ray diffraction (XRD) patterns of samples reveal an orthorhombic perovskite structure with a space group Pnma. The lattice parameters, Mn-O bond length and unit cell volume increase with doping Ag whereas Mn-O-Mn angle decrease. The scanning electron microscopy (SEM) images show thatLa 0.8 Ca 0.2 MnO 3 sample more porous than La 0.8 Ca 0.17 Ag 0.03 MnO 3 sample. Analysis using energy dispersive X-ray (EDX) confirms that there is no significant difference between designated and measured composition. M-H loop hysteresis indicate both sampleare paramagnetic materials which La 0.8 Ca 0.17 Ag 0.03 MnO 3 sample has higher susceptibility than the others.

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Investigation on structural, magneto-transport, magnetic and thermal properties of La0.8Ca0.2−xBaxMnO3 (0⩽x⩽0.2) manganites

Cited by 58 publications

References 40 publications

The Effects of External Magnetic Field on the Physical Properties of La<sub>0.41</sub>Ca<sub>0.59</sub>Mn<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub> with x = 0.06 and 0.15 in the Temperature Range of 100 – 300 K

The Effects of External Magnetic Field on the Physical Properties of La<sub>0.41</sub>Ca<sub>0.59</sub>Mn<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub> with x = 0.06 and 0.15 in the Temperature Range of 100 – 300 K

Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping

The structural, morphological and magnetic properties of Ag-doped La_0.8Ca_0.2-xAg_xMnO₃ synthesized by sol-gel method

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Investigation on structural, magneto-transport, magnetic and thermal properties of La0.8Ca0.2−xBaxMnO3 (0⩽x⩽0.2) manganites

Cited by 58 publications

References 40 publications

The Effects of External Magnetic Field on the Physical Properties of La<sub>0.41</sub>Ca<sub>0.59</sub>Mn<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub> with x = 0.06 and 0.15 in the Temperature Range of 100 – 300 K

The Effects of External Magnetic Field on the Physical Properties of La<sub>0.41</sub>Ca<sub>0.59</sub>Mn<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub> with x = 0.06 and 0.15 in the Temperature Range of 100 – 300 K

Improved electrical transport properties of polycrystalline La0.8(Ca0.12Sr0.08)MnO3 ceramics by Ag2O doping

The structural, morphological and magnetic properties of Ag-doped La0.8Ca0.2-xAgxMnO3 synthesized by sol-gel method

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Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping

The structural, morphological and magnetic properties of Ag-doped La_0.8Ca_0.2-xAg_xMnO₃ synthesized by sol-gel method