Structural, magnetic and electrical properties of Fe substituted GdCrO3

Dash, Bibhuti Bhusan; Ravi, S.

doi:10.1016/j.solidstatesciences.2018.07.018

Cited by 34 publications

(11 citation statements)

References 44 publications

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“…Nine distinct Raman active modes are identified in this study at 140, 155, 250, 314, 384, 413, 470, 553 and 562 cm −1 . The placements of each Raman active mode match with the previously reported modes in the literature [6,22,23]. In general, Gd 3+ ions are significant below 450 cm −1 in contrary to the Cr 3+ ions, which predominate above 450 cm −1 in deciding the phonon frequencies of GdCrO 3 [22].…”

Section: Raman Analysessupporting

confidence: 84%

“…The coupling between magnetic ordering and electric polarization results in multiferroic properties in GdCrO 3 , thereby enabling it to be a suitable contender in modern applications in magnetic and ferroelectric devices. Likewise, numerous efforts have been endured to exploit the dielectric properties of these materials for various applications such as power transformer, resonators and filters, cables, capacitor, transducers, etc [5][6][7]. Due to these applications and photocatalysis, GdCrO 3 has received a lot of attention in recent times [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Qahtan,

Somvanshi,

Manzoor

et al. 2023

Phys. Scr.

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This work delivers the research findings of the temperature dependent DC resistivity, AC impedance and ferroelectric polarization of GdCr1-xMnxO3 (x=0 and 0.3). Mixed valence states of Cr (Cr3+ and Cr4+) are explored using x-ray photoelectron spectroscopy analysis. The exponential decay of DC resistivity on escalating the temperature advocates the semiconducting-like nature for the probed samples. The DC resistivity data of these samples fit well to small-polaron hopping and variable range hopping models. The impedance attributes of these samples were scrutinized over a broad spectrum of temperatures at selected frequencies. The values of the real and imaginary parts of impedance unveil substantial reduction on raising the temperature, thereby signifying the increase in conductivity of the samples. Pristine sample displays an electrical relaxation peak at 65°C, which translates towards the lower temperature at higher frequencies. Further, the semicircular behavior of Nyquist plots at higher temperatures indicates the reduction of the charge transfer resistance. The equivalent circuits of Nyquist plots are generated using Z-view software. From these plots, it is perceived that grain boundary resistance upsurges while the grain resistance and capacitance drops on doping. The ferroelectric measurements reveal that the coercive field (Ec) values decrease whereas the values of maximum polarization (Pm), remnant polarization (Pr) and energy storage increase in 30% doped GdCrO3. These observations establish that electrical and ferroelectric properties of GdCrO3 system can be tuned with appropriate Mn doping.

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Section: Raman Analysessupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Qahtan,

Somvanshi,

Manzoor

et al. 2023

Phys. Scr.

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“…The value of the Curie constant C has a substantial difference compared with the value reported for GdFe 0.5 Cr 0.5 O 3 . [30] This phenomenon is caused by the internal field that B-site ions exert on Gd 3þ ions, which attenuates the effect of an applied magnetic field. In the following paragraph, we will discuss on the factors contributing to this apparent disparity in more detail.…”

Section: Temperature Dependence Of Magnetizationmentioning

confidence: 99%

Quantitative Calculation of the Clustering Behavior of Fe‐Rich and Cr‐Rich REFe_pCr_1−pO₃ Crystals

Liu

Zhang

et al. 2022

Physica Rapid Research Ltrs

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This work has focused on the cluster state of B‐site ions in the rare‐earth perovskite REFepCr1−pO3, and GdFe0.5Cr0.5O3 is taken for instance. This analysis indicates a paramagnetic behavior of the system, which originates from the paramagnetic contribution of the Gd3+. An internal‐field model is used to simplify the superexchange interaction between the A/B‐sites. Furthermore, the cluster state of B‐site ions is computed using the average number of nearest‐neighborhoods. Using Marine Predator Algorithm to fit the experiment data, it is found that Fe–Cr interaction does not conform to the case of ferromagnetic superexchange; therefore, there is no spin glass behavior in this system. Via fitting the Mossbauer spectrum at low temperatures (120 and 12 K), the calculations described above are verified. The calculation gives the hyperfine‐field intervals of 2.47 and 0.92 T at 120 and 12 K. It is found that B‐site ions tend to form clusters. The arrangement of the ions is random and without the tendency of orderly interval occupation of ions (like double perovskite). The study sheds light on the mechanism of single‐ion clustering and introduces new methods for calculating single‐ion clustering states. It can also be applied to the case of other A‐site ions in perovskite system and is not just limited to p = 0.5 in REBpB’1−pO3.

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“…T N-Cr (168.97 K), when the magnetic structure of Cr 3+ ions establishes below T N-Cr , the staggered magnetization could induce short-range Gd 3+ magnetic orders due to possible Gd 3+ -Cr 3+ couplings [15,36,37]. To model these complicated magnetic behaviors, we modified Eq.…”

Section: B Magnetic Phase Transitionsmentioning

confidence: 99%

“…Magnetic refrigeration has risen to be a new civilian refrigeration technology [10,11]. Beside the ferroelectric property, the GdCrO 3 compound has attracted much attention and been believed to be a promising magnetorefrigerator material due to its high effective magnetic entropy change [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetocaloric effect and magnetic phase diagrams of single-crystalGdCrO3

Zhu

Zhou

et al. 2020

Phys. Rev. B

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The crystalline structure, magnetism, and magnetocaloric effect of a GdCrO3 single crystal grown with the laser-diode-heated floating-zone technique have been studied. The GdCrO3 single crystal crystallizes into an orthorhombic structure with the space group P mnb at room temperature. Upon cooling, under a magnetic field of 0.1 T, it undergoes a magnetic phase transition at TN-Cr = 169.28(2) K with Cr 3+ ions forming a canted antiferromagnetic (AFM) structure, accompanied by a weak ferromagnetism. Subsequently, a spin reorientation takes place at TSR = 5.18(2) K due to Gd 3+ -Cr 3+ magnetic couplings. Finally, the long-range AFM order of Gd 3+ ions establishes at T N-Gd = 2.10(2) K. Taking into account the temperature-(in)dependent components of Cr 3+ moments, we obtained an ideal model in describing the paramagnetic behavior of Gd 3+ ions within 30-140 K. We observed a magnetic reversal (positive → negative → positive) at 50 Oe with a minimum centering around 162 K. In the studied temperature range of 1.8-300 K, there exists a strong competition between magnetic susceptibilities of Gd 3+ and Cr 3+ ions, leading to puzzling magnetic phenomena. We have built the magnetic-field-dependent phase diagrams of T N-Gd , TSR, and TN-Cr, shedding light on the nature of the intriguing magnetism. Moreover, we calculated the magnetic entropy change and obtained a maximum value at 6 K and ∆µ0H = 14 T, i.e., -∆SM ≈ 57.5 J/kg.K. Among all RECrO3 (RE = 4f n rare earths, n = 7-14) compounds, the single-crystal GdCrO3 compound exhibits the highest magnetic entropy change, as well as an enhanced adiabatic temperature, casting a prominent magnetocaloric effect for potential application in magnetic refrigeration.

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Structural, magnetic and electrical properties of Fe substituted GdCrO3

Cited by 34 publications

References 44 publications

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Quantitative Calculation of the Clustering Behavior of Fe‐Rich and Cr‐Rich REFe_pCr_1−pO₃ Crystals

Enhanced magnetocaloric effect and magnetic phase diagrams of single-crystalGdCrO3

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Structural, magnetic and electrical properties of Fe substituted GdCrO3

Cited by 34 publications

References 44 publications

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO3

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO3

Quantitative Calculation of the Clustering Behavior of Fe‐Rich and Cr‐Rich REFepCr1−pO3 Crystals

Enhanced magnetocaloric effect and magnetic phase diagrams of single-crystalGdCrO3

Contact Info

Product

Resources

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Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Quantitative Calculation of the Clustering Behavior of Fe‐Rich and Cr‐Rich REFe_pCr_1−pO₃ Crystals