Magnetic properties of NdMn 1−x Fe x O 3+δ (0≤ x ≤0.3) system.

Mihalik, M.; Fitta, Magdalena; Bałanda, Maria; Vávra, M.; Gabáni, S.; Zentková, M.; Briančin, Jaroslav

doi:10.1016/j.jmmm.2013.06.024

Cited by 26 publications

(22 citation statements)

References 35 publications

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“…As the temperature increase, it appears an increase in entropy and it tends to maximum value at T 4T c . This result is observed experimentally in Ho 3 Co compound which has orthorhombic structure [1], a single crystalline PrPtAl [3] and [4]. For T¼1, we obtain maximum value of entropy from Eq.…”

Section: Entropysupporting

confidence: 74%

“…The reason of this type of behavior is that the system has two energies values which are close to each other. Experimentally, molar heat capacity of NdMn 1 À x Fe x O 3 þ δ (0 rx r0.3) compound exhibits Schottky-peak at T N ¼85.1 K [4]. Moreover, in the ferromagnet PrPtAl single crystal, Schottky-peak is observed [3].…”

Section: Heat Capacitymentioning

confidence: 94%

“…The thermodynamic properties of the magnetic system have been studied by many authors both experimentally [1][2][3][4] and theoretically [5][6][7][8][9][10][11]. Effective field theories generally used to describe these thermodynamic properties.…”

Section: Introductionmentioning

confidence: 99%

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The thermodynamic properties of a spin-1/2 Heisenberg ferromagnetic system using Oguchi's method

Mert

2015

Journal of Magnetism and Magnetic Materials

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Section: Entropysupporting

confidence: 74%

Section: Heat Capacitymentioning

confidence: 94%

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The thermodynamic properties of a spin-1/2 Heisenberg ferromagnetic system using Oguchi's method

Mert

2015

Journal of Magnetism and Magnetic Materials

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“…In this situation, one would expect a very complex interplay of spin, lattice, orbital degrees of freedom between the Mn and Fe sublattices and hence a new set of enriching physical properties. Substitution of Mn 3+ ions at the Fe site not only makes it J-T active, it also tunes the super exchange interaction, influences the magnetic symmetry and spin reorientation through the Mn-Fe, Nd-Mn and Nd-Fe interactions [31][32][33]. The electron-phonon coupling will also change due to change in J-T interaction upon doping.…”

Section: Introductionmentioning

confidence: 99%

Spin reorientation inNdFe0.5Mn0.5O3: Neutron scattering andab initiostudy

et al. 2017

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The structural, magnetic, and electronic properties of NdFe0.5Mn0.5O3 have been studied in detail using bulk magnetization, neutron/x-ray diffraction and first principles density functional theory calculations. The material crystallizes in the orthorhombic P bnm structure, where both Mn and Fe occupy the same crystallographic site (4b). Mn/Fe sublattice of the compound orders in to a G-type antiferromagnetic phase close to 250 K where the magnetic structure belongs to Γ1 irreducible representation with spins aligned along the crystallographic b direction. This is unconventional in the sense that most of the orthoferrites and orthochromites order in the Γ4 representation below the Néel temperature.This magnetic structure then undergoes a complete spin reorientation transition with temperature in the range 75 K > ∼ T > ∼ 25 K where the magnetic structure exists as a sum of two irreducible representations (Γ1+Γ2) as seen from neutron diffraction measurements. At 6 K, the magnetic structure belongs entirely to Γ2 representation with spins aligned antiferromagnetically along the crystallographic c direction having a small ferromagnetic component (Fx). The unusual spin reorientation and correlation between magnetic ground state and electronic structure have been investigated using first principles calculations within GGA+U and GGA+U+SO formalisms.

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“…[22][23][24][25] Recently, additional investigations have been performed for 0 ≤ x ≤ 0.3. [26][27][28] The substitution of Fe 3+ for Mn 3+ ions modifies the superexchange interactions, alters the polarization of the Nd 3+ ions through the Nd-Mn and Nd-Fe interactions, and changes the electron-phonon coupling due to reduction of the Jahn-Teller effect. 29 Although NdFeO 3 has a significantly higher ordering temperature than NdMnO 3 , T N is found to monotonically decrease with iron doping in the range of 0 ≤ x ≤ 0.3 that was studied.…”

Section: Introductionmentioning

confidence: 99%

Magnetic structure of the mixed antiferromagnet NdMn0.8Fe0.2O3

Mihalik

Hoser

et al. 2017

Phys. Rev. B

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The magnetic structure of the mixed antiferromagnet NdMn0.8Fe0.2O3 was resolved. Neutron powder diffraction data definitively resolve the Mn-sublattice with a magnetic propagation vector k = (000) and with the magnetic structure (Ax, Fy, Gz) for 1.6 K < T < TN (≈ 59 K). The Nd-sublattice has a (0, fy, 0) contribution in the same temperature interval. The Mn sublattice undergoes a spin-reorientation transition at T1 ≈ 13 K while the Nd magnetic moment abruptly increases at this temperature. Powder X-ray diffraction shows a strong magnetoelastic effect at TN but no additional structural phase transitions from 3 K to 300 K. Density functional theory calculations confirm the magnetic structure of the undoped NdMnO3 as part of our analysis. Taken together, these results show the magnetic structure of the Mn-sublattice in NdMn0.8Fe0.2O3 is a combination of the Mn and Fe parent compounds, but the magnetic ordering of the Nd sublattice spans a broader temperature interval than in case of NdMnO3 and NdFeO3. This result is a consequence of the fact that the Nd ions do not order independently, but via polarization from Mn/Fe sublattice.

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Magnetic properties of NdMn 1−x Fe x O 3+δ (0≤ x ≤0.3) system.

Cited by 26 publications

References 35 publications

The thermodynamic properties of a spin-1/2 Heisenberg ferromagnetic system using Oguchi's method

The thermodynamic properties of a spin-1/2 Heisenberg ferromagnetic system using Oguchi's method

Spin reorientation inNdFe0.5Mn0.5O3: Neutron scattering andab initiostudy

Magnetic structure of the mixed antiferromagnet NdMn0.8Fe0.2O3

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