Influence of the cationic ordering in the dielectric properties of the La2MnCoO6 perovskite

Yáñez-Vilar, S.; Andújar, Manuel; Rivas, José; Señarı́s-Rodrı́guez, M. A.

doi:10.1016/j.jallcom.2009.05.103

Cited by 61 publications

(48 citation statements)

References 20 publications

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“…The giant dielectric response is attributed to the mixed-valent structure (Cu + /Cu 2+ and Ti 3+ / Ti 4+ ). As shown in the previous work [3], the order of B sites will significantly affect the dielectric properties of materials www.elsevier.com/locate/ceramint with double-perovksite structure, so the study of dielectric properties of layered-ordered double-perovskite La 2 CuSnO 6 ceramic is nontrivial. So far, the dielectric properties of layeredordered double-perovskite La 2 CuSnO 6 ceramic have not been investigated to our knowledge.…”

Section: Introductionmentioning

confidence: 98%

“…Cation ordering in complex perovskite oxides with two or more cations mixed in the octahedrally coordinated B-sites, is an interesting phenomenon and has been extensively studied, and is known to have strong influence on the structural and physical properties (magnetic, electric, dielectric, ferroelectric, piezoelectric, etc.) of these materials [3].…”

Section: Introductionmentioning

confidence: 99%

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Giant dielectric response and mixed-valent structure in the layered-ordered double-perovskite ceramics

Yang

Liu

et al. 2011

Ceramics International

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Giant dielectric response and mixed-valent structure in the layered-ordered double-perovskite ceramics

Yang

Liu

et al. 2011

Ceramics International

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“…al. [14] synthesized LCMO using a nitrate decomposition method and obtained a mixed phase of 97% orthorhombic and 3% rhombohedral.…”

Section: Introductionmentioning

confidence: 99%

Evidence of long-range ferromagnetic order and spin frustration effects in the double perovskite La2CoMnO6

et al. 2019

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We present a comprehensive study on the magnetic structure, dynamics, and phase evolution in the single-phase double perovskite La2CoMnO6. The mixed valence state due to oxygen deficiency is verified by X-ray photoelectron spectroscopy, and confirms a double ferromagnetic transition observed in DC magnetization. Neutron diffraction reveals that the magnetic structure is dominated by long-range ferromagnetic ordering, which is further corroborated by a critical exponents analysis of the paramagnetic to ferromagnetic phase transition. An analysis of the magnetization dynamics by means of linear and nonlinear ac magnetic susceptibilities marks the presence of two distinct cluster glass-like states that emerge at low temperatures. The isothermal entropy change as a function of temperature and magnetic field (H) is exploited to investigate the mechanism of stabilization of the magnetic phases across the H-T phase diagram. In the regime of the phase diagram where thermal energy is sufficiently low, regions of competing interactions due to local disorder become stabilized and display glasslike dynamics. The freezing mechanism of clusters is illustrated using a unique probe of transverse susceptibility that isolates the effects of the local anisotropy of the spin clusters. The

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“…Within this structure, the cationic ordering state of the B e B' ions, occupying respectively the 2c e 2d Wyckoff sites, has a strong influence on the vibrational, electrical and magnetic properties of the material. In particular, the ordering of the magnetic ions (Mn, Co or Ni) in B/B' sites affects the spinphonon coupling 13,14 , the critical magnetic temperatures 15 , the electrical conductivity 12,16 and the dielectric constant 17,18 . Concerning the dielectric constant of LCMO there are some discrepancies on the results presented in the literature: Yáñez-Vilar et al 18 reported that the radio-frequency (<10 4 Hz) dielectric constant of their ceramic samples, at room temperature, increased by two orders of magnitude from the ordered to disordered material, attaining values as high as 10 5 .…”

Section: Introductionmentioning

confidence: 99%

Intrinsic dielectric properties of magnetodielectric La2CoMnO6

Silva

Moreira

Almeida

et al. 2015

Journal of Applied Physics

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Manganites with double perovskite structure are being attractive because of their interesting magnetoelectric and dielectric responses. Particularly, colossal dielectric constant (CDC) behavior has been observed in La 2 CoMnO 6 (LCMO), at radio frequencies and room temperature. In this paper, we employed infrared-reflectivity spectroscopy onto a LCMO ceramic obtained through a modified Pechini's method to determine the phonon contribution to the intrinsic dielectric response of the system and to investigate the CDC origin. The analysis of the main polar modes and of the obtained phonon parameters show that CDC effect of LCMO is of pure extrinsic origin. In addition, we have estimated the dielectric constant and quality factor of the material in microwave region, ' s 16 and Q u × f 124 THz, which shows that LCMO is appropriate for applications into microwave devices and circuitry.

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Influence of the cationic ordering in the dielectric properties of the La2MnCoO6 perovskite

Cited by 61 publications

References 20 publications

Giant dielectric response and mixed-valent structure in the layered-ordered double-perovskite ceramics

Giant dielectric response and mixed-valent structure in the layered-ordered double-perovskite ceramics

Evidence of long-range ferromagnetic order and spin frustration effects in the double perovskite La2CoMnO6

Intrinsic dielectric properties of magnetodielectric La2CoMnO6

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