Metal transition doping effect on the structural and physical properties of delafossite-type oxide CuCrO2

Jlaiel, F.; Amami, Mongi; Boudjada, N. Chniba; Strobel, Pierre; Salah, Abdelhamid Ben

doi:10.1016/j.jallcom.2011.04.153

Cited by 27 publications

(17 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16, the Bragg peaks observed in the powder x-ray diffraction patterns are found to broaden with the increase of the Al 3+ nominal content, a possible sign of chemical disorder. A similar observation has recently been made on CuCr 0.95 M 0.05 O 2 samples with M = Al, Sc, Rh, Co. 19 In the same way, the CuCr 1−x Fe x O 2 series is not easily made, as structural disorder is evidenced by anisotropic broadening of peaks in the x-ray diffractograms. 20 Due to the Jahn-Teller distortion of Mn 3+ (t 2g 3 e g 1 ), the manganese analog CuMnO 2 crystallizes in a monoclinic structure, the crednerite C2/m, 21 therefore complicating the formation of the solid solution CuCr 1−x Mn x O 2 .…”

Section: Introductionsupporting

confidence: 70%

Magnetic dilution and steric effects in the multiferroic delafossite CuCrO2

et al. 2012

View full text Add to dashboard Cite

In order to get to the bottom of substitution effects reported in CuCrO 2 delafossite, structural, magnetic, and electric properties of several CuCr 1−x M x O 2 series, where M 3+ is a S = 0 cation (M 3+ = Al 3+ , Ga 3+ , Sc 3+ , Rh 3+ ), have been investigated. It is shown that the homogeneity of the substitution is element dependent and is particularly difficult to achieve for the smallest Al 3+ cation. Ferroelectricity and dielectric properties are found to depend on the x value, but also on the nature of M: The largest substitution effects are observed for the larger elements, owing to the decrease of the Cr 3+ -Cr 3+ interaction resulting from the enlargement of the in-plane lattice parameter. However, the magnetic structures of CuCr 0.9 Ga 0.1 O 2 and CuCr 0.9 Rh 0.1 O 2 , revealed close to that of CuCrO 2 by neutron diffraction, demonstrate the great stability of this antiferromagnetic incommensurate structure against the presence of {M 3+ , S = 0} cations. This emphasizes the very different nature of the magnetic ground state of CuCrO 2 , as compared to CuFeO 2 , despite their common structural characteristics.

show abstract

Section: Introductionsupporting

confidence: 70%

Magnetic dilution and steric effects in the multiferroic delafossite CuCrO2

et al. 2012

View full text Add to dashboard Cite

show abstract

“…According to refs. [33][34][35][36], the Mn 3+ subsisting can destabilize the anti-ferromagnetic order of Rh 3+ ions, modulate the spin configuration, and bring about ferromagnetism. Although the super-exchange interaction between Mn 3+ is also antiferromagnetic [37], the coexistence of Mn 3+ and Rh 3+ should induce a new magnetic exchange mechanism.…”

Section: Discussionmentioning

confidence: 99%

The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

Amami

Hlil

Salah³

2016

J Supercond Nov Magn

Self Cite

View full text Add to dashboard Cite

The CuRh 1−x Mn x O 2 (0.00 ≤ x ≤ 0.10) polycrystalline powders were synthesized by the direct solidstate reaction. The magnetic susceptibility was measured in the temperature range of 4-300 K. It was found that the magnetic susceptibility (χ ) increases rapidly with the doping of Rh 3+ by Mn 3+ ions with existence of paramagnetic substance at low temperature. For x = 0.1, a development of new antiferromagnetic (AF) transition around 26 K and the magnetic data for CuRh 1−x Mn x O 2 show evidence for weak ferromagnetic (FM) transition between 100 and 130 K. Clear hysteresis loops indicate that FM order exists in Mn-doped samples at 5 K. All samples behave like semiconductors. The ferromagnetism properties can be attributed to the double-exchange interaction between the Mn 3+ and Rh 3+ semiconductor compounds. We analyze the magnetic entropy change S M of CuRh 0.9 Mn 0.1 O 2 . Using Arrott plots, it was found that the phase transition for this sample at T N = 42 K is of second order. The maximum entropy change of ∼ 0.017 J/kg K upon a filed variation of ∼ 1 T and ∼ 0.076 J/kg K upon a filed variation of ∼ 5

show abstract

“…For the undoped x = 0, a distinct peak occurs at T N = 26 K in M(T) curve associated with the paramagnetic (PM)-AFM phase transition, which is consistent with the previous reports. 1,[11][12][13][14][15][16][17][18][19][20][21] Upon Ti substituting for Cr, the anomaly around T N becomes blurred while the T N shows little change, which should be attributed to the randomness or spin dilution introduced by the doping. 21 Figure 2(b) shows the temperature-dependent resistivity q(T).…”

Section: Methodsmentioning

confidence: 99%

“…Substituting Cr 3+ ions by divalent ions such as Mg 2+ , Ca 2+ or introducing Cr deficiency leads to a drastic decrease in the resistivity and the Seebeck coefficient as well as a significant enhancement of the AFM transition . Replacing Cr 3+ by isovalent magnetic ions like Fe 3+ , Ni 3+ , Co 3+ , and Rh 3+ changes the ground state from an AFM state to a ferromagnetic (FM) state . Furthermore, Ni doping is found to remarkably enhance the ferroelectricity .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3]14 Chemical doping on Cr site can also significantly tune the physical properties of CuCrO 2 . 6,[11][12][13][15][16][17][18][19][20][21] Substituting Cr 3+ ions by divalent ions such as Mg 2+ , Ca 2+ or introducing Cr deficiency leads to a drastic decrease in the resistivity and the Seebeck coefficient as well as a significant enhancement of the AFM transition. 11,[15][16][17] Replacing Cr 3+ by isovalent magnetic ions like Fe 3+ , Ni 3+ , Co 3+ , and Rh 3+ changes the ground state from an AFM state to a ferromagnetic (FM) state.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Slight Ti‐Doping‐Induced Strong Time‐Dependent Electrical Transport Behavior in CuCr_1−xTi_xO₂

Zhang

2015

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

We investigate the effect of slight Ti substitution (≤0.5%) for Cr in CuCr1−xTixO2 by measuring the structural, magnetic, and electrical transport properties. Upon Ti doping, the antiferromagnetic transition becomes blurred without a change in Néel temperature. Ti4+ substituting to Cr3+ site is found to significantly enhance the resistivity due to the diminishing conducting holes. We find strong time‐dependent electrical transport behavior in CuCr1−xTixO2 induced by slight Ti doping. The key observation is that a metastable behavior occurs in Ti‐doped CuCr1−xTixO2. A strong resistive relaxation (RR) behavior occurs in Ti‐doped CuCr1−xTixO2 with its magnitude remarkably increasing with increasing Ti content, while it is absent in undoped CuCrO2. The RR is found to be described by the combination of an exponential function and a logarithmic dependence at long time. The relaxation behavior in CuCr1−xTixO2 is found to show a correlation with the local lattice deformation.

show abstract

Metal transition doping effect on the structural and physical properties of delafossite-type oxide CuCrO2

Cited by 27 publications

References 27 publications

Magnetic dilution and steric effects in the multiferroic delafossite CuCrO2

Magnetic dilution and steric effects in the multiferroic delafossite CuCrO2

The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

Slight Ti‐Doping‐Induced Strong Time‐Dependent Electrical Transport Behavior in CuCr_1−xTi_xO₂

Contact Info

Product

Resources

About

Metal transition doping effect on the structural and physical properties of delafossite-type oxide CuCrO2

Cited by 27 publications

References 27 publications

Magnetic dilution and steric effects in the multiferroic delafossite CuCrO2

Magnetic dilution and steric effects in the multiferroic delafossite CuCrO2

The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

Slight Ti‐Doping‐Induced Strong Time‐Dependent Electrical Transport Behavior in CuCr1−xTixO2

Contact Info

Product

Resources

About

Slight Ti‐Doping‐Induced Strong Time‐Dependent Electrical Transport Behavior in CuCr_1−xTi_xO₂