Specific heat and magnetic interactions in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">NdCrO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Bartolomé, Fernando; Bartolomé, J.; Castro, Miguel; Melero, Julio J.

doi:10.1103/physrevb.62.1058

Cited by 65 publications

(61 citation statements)

References 35 publications

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“…Calculated ⌬E / k B for Nd 3+ ions in this work gives a value of the energy splitting of ϳ27 K, in excellent agreement with neutron inelastic experiments ͑ϳ28 K͒. 28 The energy splitting ⌬E / k B is reduced in the La doped samples, which is attributed to the weaker Cr-RE interactions. The splitting of the Cr 3+ 3d orbital and the Nd 3+ ground state in Nd 1−x La x CrO 3 are shown in Fig.…”

Section: Heat Capacitysupporting

confidence: 71%

“…With falling temperature, the first magnetic ordering was observed at T N = 219.6 K for undoped NdCrO 3 , which is attributed to the Cr 3+ spin ordering. 28 It is found that T N increases linearly from 219.6 K for pure NdCrO 3 to 291.3 K for LaCrO 3 . In Nd 1−x La x CrO 3 , the Cr 3+ ions are predominantly ordered antiferromagnetically with a small canting angle, which results in a net moment starting to appear below T N .…”

Section: Magnetic Propertiesmentioning

confidence: 92%

“…The overall shape of C p ͑T͒ is generally consistent with the results of prior work on pure NdCrO 3 . 28,29 The C p of all the samples in the high temperature ͑high-T͒ range follows the Dulong-Petit law, that is, the high-T limiting value is consistent with the classical value of 3R per atomic site in the formula unit, where R is the molar gas constant. The most notable C p ͑T͒ feature at high-T is the clear -shape anomalous peak at T N for all the samples.…”

Section: Heat Capacitymentioning

confidence: 99%

“…The extremely strong Cr-Nd coupling has been reported to be greater than the corresponding coupling in the other RECrO 3 compounds. 23,28 Because the total angular momentum is J = 0 for La 3+ ions, the La doping can reduce the magnetic contribution of Nd 3+ to the total magnetization. Therefore, decreased was observed in the doped samples.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

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Structure, magnetic, and thermal properties of Nd1−xLaxCrO3 (≤x≤1.0)

Cheng

Wang

et al. 2010

Journal of Applied Physics

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Perovskite-type Nd 1−x La x CrO 3 (0 ≤ x ≤1.0) polycrystalline samples were synthesized using solid state reaction. Structural studies indicate that the lattice parameters, metal-oxygen bond lengths, and angles of Nd 1−x La x CrO 3 strongly depend on the La content. Two magnetic transition temperatures, Cr 3+ antiferromagnetic ordering temperature (T N ) and the spin reorientation phase transition temperature (T SRPT ), have been observed in the M-T curves. The increase in T N and decrease in T SRPT with increasing x value can be explained by the change in the magnetic interactions due to La doping. The heat capacity of Nd 1−x La x CrO 3 measured from 2 to 300 K reveals that the lattice, electronic, and magnetic contributions to heat capacity can be well interpreted quantitatively using the Debye and Schottky models. The splitting energy of the Cr 3 + 3dt 2g orbital and the Nd 3+ ground state have been calculated by fitting to the Schottky anomaly at very low temperature. The Cr-Nd interaction is suppressed gradually by La doping, which is verified by the calculation of the mean-field interaction parameter. This doping dependence provides directed evidence of TM-RE magnetic interactions in perovskite compounds, in agreement with the proposed model. Perovskite-type Nd 1−x La x CrO 3 ͑0 Յ x Յ 1.0͒ polycrystalline samples were synthesized using solid state reaction. Structural studies indicate that the lattice parameters, metal-oxygen bond lengths, and angles of Nd 1−x La x CrO 3 strongly depend on the La content. Two magnetic transition temperatures, Cr 3+ antiferromagnetic ordering temperature ͑T N ͒ and the spin reorientation phase transition temperature ͑T SRPT ͒, have been observed in the M-T curves. The increase in T N and decrease in T SRPT with increasing x value can be explained by the change in the magnetic interactions due to La doping. The heat capacity of Nd 1−x La x CrO 3 measured from 2 to 300 K reveals that the lattice, electronic, and magnetic contributions to heat capacity can be well interpreted quantitatively using the Debye and Schottky models. The splitting energy of the Cr 3+ 3dt 2g orbital and the Nd 3+ ground state have been calculated by fitting to the Schottky anomaly at very low temperature. The Cr-Nd interaction is suppressed gradually by La doping, which is verified by the calculation of the mean-field interaction parameter. This doping dependence provides directed evidence of TM -RE magnetic interactions in perovskite compounds, in agreement with the proposed model.

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Section: Heat Capacitysupporting

confidence: 71%

Section: Magnetic Propertiesmentioning

confidence: 92%

Section: Heat Capacitymentioning

confidence: 99%

Section: Magnetic Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Structure, magnetic, and thermal properties of Nd1−xLaxCrO3 (≤x≤1.0)

Cheng

Wang

et al. 2010

Journal of Applied Physics

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“…The ordering of Dy moment emerges at ≈18 K, whereas a slight ordering of Dy moment via Dy-V coupling starts at ≈36 K. 30 In the case of NdCrO 3 , while the Cr spin reorientation happens at ≈34.2 K, the Nd-Cr interaction starts to polarize the Nd moments at ≈11 K before Nd becomes long-range ordered. 31 We now turn to discuss the long-range Ce AFM ordering below T Ce ≈ 4 K. Zhao et al 10 proposed a magnetic structure of Ce sublattice based on their powder neutron measurements. The projections of nearest-neighbor Ce moments in the ab plane are perpendicular to each other with slight tilting of Ce moments towards the c axis, forming a noncollinear magnetic structure.…”

Section: Ce L Ii Rxms Measurementsmentioning

confidence: 99%

Magnetic structures and interplay between rare-earth Ce and Fe magnetism in single-crystal CeFeAsO

Zhang

Kim

et al. 2013

Phys. Rev. B

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Neutron and synchrotron resonant x-ray magnetic scattering (RXMS) complemented by heat capacity and resistivity measurements reveal the evolution of the magnetic structures of Fe and Ce sublattices in a CeFeAsO single crystal. The RXMS of magnetic reflections at the Ce L-II edge shows a magnetic transition that is specific to the Ce antiferromagnetic long-range ordering at T-Ce approximate to 4 K with short-range Ce ordering above T-Ce, whereas neutron diffraction measurements of a few magnetic reflections indicate a transition at T* approximate to 12 K with an unusual order parameter. Detailed order-parameter measurements on several magnetic reflections by neutrons show a weak anomaly at 4 K that we associate with the Ce ordering. The successive transitions at T-Ce and T* can also be clearly identified by two anomalies in heat capacity and resistivity measurements. The higher transition temperature at T* approximate to 12 K is mainly ascribed to Fe spin reorientation transition, below which Fe spins rotate uniformly and gradually in the ab plane. The Fe spin reorientation transition and short-range Ce ordering above T-Ce reflect the strong FeCe couplings prior to long-range ordering of the Ce. The evolution of the intricate magnetic structures in CeFeAsO going through T* and T-Ce is proposed. Neutron and synchrotron resonant x-ray magnetic scattering (RXMS) complemented by heat capacity and resistivity measurements reveal the evolution of the magnetic structures of Fe and Ce sublattices in a CeFeAsO single crystal. The RXMS of magnetic reflections at the Ce L II edge shows a magnetic transition that is specific to the Ce antiferromagnetic long-range ordering at T Ce ≈ 4 K with short-range Ce ordering above T Ce , whereas neutron diffraction measurements of a few magnetic reflections indicate a transition at T * ≈ 12 K with an unusual order parameter. Detailed order-parameter measurements on several magnetic reflections by neutrons show a weak anomaly at 4 K that we associate with the Ce ordering. The successive transitions at T Ce and T * can also be clearly identified by two anomalies in heat capacity and resistivity measurements. The higher transition temperature at T * ≈ 12 K is mainly ascribed to Fe spin reorientation transition, below which Fe spins rotate uniformly and gradually in the ab plane. The Fe spin reorientation transition and short-range Ce ordering above T Ce reflect the strong Fe-Ce couplings prior to long-range ordering of the Ce. The evolution of the intricate magnetic structures in CeFeAsO going through T * and T Ce is proposed. Disciplines Condensed Matter Physics | Materials Science and Engineering | Metallurgy Comments

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Elliptic NdCrO₃ microplate by a simple one‐step hydrothermal synthesis route and its characterization and magnetic properties

Yao

Zhang

Fan

et al. 2015

Crystal Research and Technology

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Elliptic NdCrO3 microplates were synthesized by a simple and facile one‐step hydrothermal method of processing temperature 280 °C for 3 days. The products prepared in this paper have been characterized by X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), X‐ray fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR) and field‐emission scanning electron microscopy (FESEM). The magnetic properties of the final sample are also studied. The XRD pattern indicates the pure orthorhombic phase for NdCrO3 particles, the XPS, XRF and FTIR results further demonstrate the composition and purity of the final product. A possible growth mechanism for elliptic NdCrO3 microplates is proposed. Through the investigation of magnetic properties, it can be generally concluded that the orthorhombic elliptic NdCrO3 microplates exhibit typical behaviors of magnetic transition, spin reorientation transition and magnetic exchange bias. The Néel temperature is 218 K and the spin reorientation transition temperature is 46 K. The hysteresis loop under 5 K shows that the value of exchange bias field (Hex) is 12 Oe and the shift of remanent magnetization (ΔM) is 0.008 emu/g, respectively.

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Specific heat and magnetic interactions inNdCrO3

Cited by 65 publications

References 35 publications

Structure, magnetic, and thermal properties of Nd1−xLaxCrO3 (≤x≤1.0)

Structure, magnetic, and thermal properties of Nd1−xLaxCrO3 (≤x≤1.0)

Magnetic structures and interplay between rare-earth Ce and Fe magnetism in single-crystal CeFeAsO

Elliptic NdCrO₃ microplate by a simple one‐step hydrothermal synthesis route and its characterization and magnetic properties

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Specific heat and magnetic interactions inNdCrO3

Cited by 65 publications

References 35 publications

Structure, magnetic, and thermal properties of Nd1−xLaxCrO3 (≤x≤1.0)

Structure, magnetic, and thermal properties of Nd1−xLaxCrO3 (≤x≤1.0)

Magnetic structures and interplay between rare-earth Ce and Fe magnetism in single-crystal CeFeAsO

Elliptic NdCrO3 microplate by a simple one‐step hydrothermal synthesis route and its characterization and magnetic properties

Contact Info

Product

Resources

About

Elliptic NdCrO₃ microplate by a simple one‐step hydrothermal synthesis route and its characterization and magnetic properties