The perovskite-type structures of DyAlO<sub>3</sub>, DyFeO<sub>3</sub>and some related lanthanon mixed oxides

Dalziel, J.; Welch, A. J. E.

doi:10.1107/s0365110x60002314

Cited by 38 publications

(9 citation statements)

References 1 publication

(1 reference statement)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In Figure A, the (511) peak of the BaNd 2 Ti 4 O 12 phase is around 32 o . The main peak of the NdAlO 3 phase and the (231) peak of the BaNd 2 Ti 4 O 12 phase are both around 33 o . Tseng et al.…”

Section: Resultsmentioning

confidence: 95%

“…20 The main peak of the NdAlO 3 phase and the (231) peak of the BaNd 2 Ti 4 O 12 phase are both around 33 o . 20,23 Tseng et al report a simple way to estimate the phase content ratio by comparing the peak intensities. 24 We define the peak intensity ratio (I r ) through I r =I (231) /I (511) , where I (231) and I (511) are the (231) and (511) peak intensities, respectively.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Microwave dielectric properties of (1‐x)Ba_3.75Nd_9.5Cr_0.25Nb_0.25Ti_17.5O₅₄–xNdAlO₃ ceramics

et al. 2017

View full text Add to dashboard Cite

This study presents the microwave dielectric properties calculation of (1-x)Ba 3.75 Nd 9.5 Cr 0.25 Nb 0.25 Ti 17.5 O 54 -xNdAlO 3 ceramics where x denotes the volume molar fraction. From X-ray diffraction results, the solid solution limit is calculated to be about 0.76, where it forms a single BaNd 2 Ti 4 O 12 phase in Region I (0 ≤ x ≤ 0.76), and both BaNd 2 Ti 4 O 12 and NdAlO 3 coexist in Region II (0.76 < x < 1). The solid solution limit is confirmed by independently calculating it from the dielectric constant data. There is less than 4 % deviation between the measured dielectric constant (ε r ) and the one calculated from the Maxwell-Wagner formula. The total quality factor (Q) remains almost constant in Region I and increases rapidly with the volume molar fraction of NdAlO 3 in Region II. The measured Q×f, where f is the resonant frequency, is also consistent with the calculated value in both regions. The temperature coefficient at the resonant frequency is -1.4 ppm/ o C, which agrees well with the calculated value of 0 ppm/ o C. In addition, we observed a close correlation between the bulk density and the phase evolution.

show abstract

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Microwave dielectric properties of (1‐x)Ba_3.75Nd_9.5Cr_0.25Nb_0.25Ti_17.5O₅₄–xNdAlO₃ ceramics

et al. 2017

View full text Add to dashboard Cite

show abstract

“…X-ray diffraction analysis of selected powder samples shows that all have the perovskite structure, with significant defects. 12 ͑Ref. 6͒.…”

Section: Molecular Design Institute Lawrence Berkeley National Labormentioning

confidence: 98%

Identification and optimization of advanced phosphors using combinatorial libraries

Sun

Chen

Wang

et al. 1997

Applied Physics Letters

View full text Add to dashboard Cite

A combination of thin-film deposition and physical masking steps were used to generate libraries of the rare earth activated refractory metal oxides, Gd(La,Sr)AlOx. Systematic variation of composition and processing conditions afforded tricolor phosphors with the following nominal compositions, (Gd0.46Sr0.31)Al1.23OxF1.38:Eu0.062+ (green), La0.5Al1.5Ox:Eu0.042+ (blue), and Gd0.77Al1.23Ox:Eu0.063+ (red), which had quantum efficiencies of ⩾94%, ≃60%, and ⩾93%, respectively at λmaxex. The high quenching temperatures (250–350 °C), good chromaticities and refractory nature of these phosphors are desirable features for display applications.

show abstract

“…Perovskites show many structural modifications that according to the used atoms give place to a great variety of magnetic and electronic characteristics. An example of a compound whose structure present a distortion of the ideal perovskite form, is the orthorhombic DyAlO 3 [3,4], which magnetic behavior is widely known [5][6][7][8][9][10], and interpreted from the viewpoint of the Anderson model of magnetic exchange in insulators, with a mechanism of indirect exchange between the nearest Dy ions [11].…”

Section: Introductionmentioning

confidence: 99%

Glassy magnetic behavior in the metamagnetic DyAlO3 doped with Cr

et al. 2013

View full text Add to dashboard Cite

Magnetic properties of DyAl0.926Cr0.074O3 and DyAlO3 were studied. We found that both compounds are antiferromagnetic with a low Néel transition temperature. At higher temperatures the magnetic characteristics show a Curie-Weiss dependence. The Néel temperature disappears when a field of about 2 T is applied, the system changes from an antiferromagnetic to a weak ferromagnetic behavior due to a metamagnetic transition. Furthermore, AC magnetic measurements in the Cr doped compound, at different frequencies, show a spin glass-like behavior. These transitions were studied and corroborated by specific heat measurements. We found the presence of metamagnetism and spin glass in the compound doped with chromium, determining that the small addition of chromium atoms modifies the magnetic properties of the compound DyAlO3, resulting in new features such as the spin glass-like behavior.

show abstract

The perovskite-type structures of DyAlO₃, DyFeO₃and some related lanthanon mixed oxides

Cited by 38 publications

References 1 publication

Microwave dielectric properties of (1‐x)Ba_3.75Nd_9.5Cr_0.25Nb_0.25Ti_17.5O₅₄–xNdAlO₃ ceramics

Microwave dielectric properties of (1‐x)Ba_3.75Nd_9.5Cr_0.25Nb_0.25Ti_17.5O₅₄–xNdAlO₃ ceramics

Identification and optimization of advanced phosphors using combinatorial libraries

Glassy magnetic behavior in the metamagnetic DyAlO3 doped with Cr

Contact Info

Product

Resources

About

The perovskite-type structures of DyAlO3, DyFeO3and some related lanthanon mixed oxides

Cited by 38 publications

References 1 publication

Microwave dielectric properties of (1‐x)Ba3.75Nd9.5Cr0.25Nb0.25Ti17.5O54–xNdAlO3 ceramics

Microwave dielectric properties of (1‐x)Ba3.75Nd9.5Cr0.25Nb0.25Ti17.5O54–xNdAlO3 ceramics

Identification and optimization of advanced phosphors using combinatorial libraries

Glassy magnetic behavior in the metamagnetic DyAlO3 doped with Cr

Contact Info

Product

Resources

About

The perovskite-type structures of DyAlO₃, DyFeO₃and some related lanthanon mixed oxides

Microwave dielectric properties of (1‐x)Ba_3.75Nd_9.5Cr_0.25Nb_0.25Ti_17.5O₅₄–xNdAlO₃ ceramics

Microwave dielectric properties of (1‐x)Ba_3.75Nd_9.5Cr_0.25Nb_0.25Ti_17.5O₅₄–xNdAlO₃ ceramics