Griffiths phase in antiferromagnetic CuCr0.95Ti0.05O2

Majee, M. K.; Bhobe, P. A.; Nigam, A. K.

doi:10.1016/j.jmmm.2019.04.065

Cited by 13 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure represents the temperature dependence of magnetization, M ( T ), measured in the temperature range of 5–300 K, under an applied field of 100 Oe. In agreement with literature, , CuCrO 2 displays a peaklike feature at T N ≈ 25 K that signifies its antiferromagnetic (AFM) ordering temperature. The slow decay in M ( T ) with increasing temperature is the hallmark of its geometrically frustrated magnetic triangular lattice.…”

Section: Resultssupporting

confidence: 91%

“…13 The magnetic properties of such frustrated spin systems are highly sensitive to chemical impurity that may tinker with the delicately balanced competing exchange interaction. 4,14,15 CuFeO 2 shows an antiferromagnetic transition at T N1 = 14−16 K and T N2 = 11 K, 11,16 whereas CuCrO 2 shows T N = 24−26 K, as confirmed through neutron diffraction studies. 6,17 Besides the magnetic property in the (Cr/Fe) sublattice, the 2D Cu (with 3d 10 ) plane and the extent of Cu−O bonding play a vital role in the electrical transport that is ultimately responsible for the semiconducting nature of these materials.…”

Section: ■ Introductionmentioning

confidence: 60%

“…In CuCrO 2 , the sublattice of three Cr 3+ ions have their spin oriented 120° to each other, forming a classical Heisenberg spin triangular lattice, whereas in CuFeO 2 , the magnetic structure is realized as four collinear sublattices (↑↑↓↓) with quasi-Ising character . The magnetic properties of such frustrated spin systems are highly sensitive to chemical impurity that may tinker with the delicately balanced competing exchange interaction. ,, CuFeO 2 shows an antiferromagnetic transition at T N1 = 14–16 K and T N2 = 11 K, , whereas CuCrO 2 shows T N = 24–26 K, as confirmed through neutron diffraction studies. , …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Correlation of Local Crystal Structural and Physical Properties of the Delafossite CuCr_1–xFe_xO₂ (0 ≤ x ≤ 1) Series

Majee

Bhobe

2020

Inorg. Chem.

View full text Add to dashboard Cite

Cu-based delafossites offer multifunctional properties that include electrical, magnetic, optical, and thermal transport, and they also act as a photocathode for energy-harvesting applications. Such properties can be modified by bringing about subtle changes in the chemical environment, like introducing holes or excess electrons in the system. With the aim to understand the evolution of physical properties that take place upon systematically replacing 3d3 (Cr3+) with 3d5 (Fe3+), we performed a comprehensive study of structural, electrical and thermal transport, and magnetic properties of the CuCr1–x Fe x O2 series. In agreement with the different ionic radii of trivalent cations, high-intensity X-ray diffraction confirms a systematic increase of the unit cell parameters. Extended X-ray absorption fine structure spectroscopy confirms the uniform solution of mixed trivalent Cr3+/Fe3+ cations and demonstrates the changes in the hybridization between Cu 3d and O 2p orbitals. Cu K-edge near-edge spectra reflect a sharp 1s → 4p transition associated with the ligand–metal charge transfer “shakedown” process in the collinear O–Cu–O bond along c-axis, whereas the Cr and Fe K-edge absorption spectra show small reciprocal shifts in the edge energies. The charge carrier concentration increases with Fe substitution as confirmed from Hall effect measurement; both p-type conduction and a decrease in the electrical resistivity are observed. The electrical conduction follows a 3D variable range hopping at low-temperature and thermally activated transport at high temperature. The two end members of the series are well-studied, geometrically frustrated antiferromagnetic systems; the present study of magnetic properties of intermediate compositions show a systematic increase of FM interaction with rising Fe concentration and hence a competing magnetic state. A sharp transition in high-temperature (600 K) region identifies a truly paramagnetic state for Fe rich compounds. Thermal conductivity values are drastically affected by the spin fluctuation and spin-phonon scattering taking place in these compositions.

show abstract

Section: Resultssupporting

confidence: 91%

Section: ■ Introductionmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Correlation of Local Crystal Structural and Physical Properties of the Delafossite CuCr_1–xFe_xO₂ (0 ≤ x ≤ 1) Series

Majee

Bhobe

2020

Inorg. Chem.

View full text Add to dashboard Cite

show abstract

“…T R C is the random critical temperature at which the C–W law yields a λ value close to zero above T G , and in the present case the Θ can be considered as T R C . 57 In Fig. 8(a) the linear region of the graph ln( χ −1 ) versus ln( T − T R C ) is fitted with a power law.…”

Section: Resultsmentioning

confidence: 99%

Exotic magnetic properties in Zintl phase BaVSe₃: a theoretically supported experimental investigation

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Interestingly, GP is now moreover extended to antiferromagnetic and ferrimagnetic systems as well. [ 54,55 ]…”

Section: Resultsmentioning

confidence: 99%

Observation of Cluster Glass and Griffiths‐like Phase in Fe₃O₄Nanostructures

Revathy

Varma

Surendran

2020

Physica Status Solidi (b)

View full text Add to dashboard Cite

In the present investigation, the rare occurrence of Griffiths‐like phase (GP) in Fe3O4 (magnetite) nanostructures is observed for the first time. Initially, Fe3O4 monodispersed nanoparticles and an intercalated ensemble of nanoparticles and nanorods are successfully synthesized by a facile one‐step synthesis. The magnetization, as a function of the applied field, confirms the absence of superparamagnetism in both samples. The thermomagnetic data at cryogenic temperatures show glassy nature, and the alternating current (AC) susceptibility measurements confirm the existence of cluster glass. The low‐field direct current (DC) magnetization measurements of Fe3O4 nanostructures show an anomalous magnetic behavior, which indicates the presence of GP above its Curie temperature. This unusual behavior is attributed to the presence of short‐range magnetic correlations and ferromagnetic clusters present in the system due to the size reduction.

show abstract

Griffiths phase in antiferromagnetic CuCr0.95Ti0.05O2

Cited by 13 publications

References 20 publications

Correlation of Local Crystal Structural and Physical Properties of the Delafossite CuCr_1–xFe_xO₂ (0 ≤ x ≤ 1) Series

Correlation of Local Crystal Structural and Physical Properties of the Delafossite CuCr_1–xFe_xO₂ (0 ≤ x ≤ 1) Series

Exotic magnetic properties in Zintl phase BaVSe₃: a theoretically supported experimental investigation

Observation of Cluster Glass and Griffiths‐like Phase in Fe₃O₄Nanostructures

Contact Info

Product

Resources

About

Griffiths phase in antiferromagnetic CuCr0.95Ti0.05O2

Cited by 13 publications

References 20 publications

Correlation of Local Crystal Structural and Physical Properties of the Delafossite CuCr1–xFexO2 (0 ≤ x ≤ 1) Series

Correlation of Local Crystal Structural and Physical Properties of the Delafossite CuCr1–xFexO2 (0 ≤ x ≤ 1) Series

Exotic magnetic properties in Zintl phase BaVSe3: a theoretically supported experimental investigation

Observation of Cluster Glass and Griffiths‐like Phase in Fe3O4Nanostructures

Contact Info

Product

Resources

About

Correlation of Local Crystal Structural and Physical Properties of the Delafossite CuCr_1–xFe_xO₂ (0 ≤ x ≤ 1) Series

Correlation of Local Crystal Structural and Physical Properties of the Delafossite CuCr_1–xFe_xO₂ (0 ≤ x ≤ 1) Series

Exotic magnetic properties in Zintl phase BaVSe₃: a theoretically supported experimental investigation

Observation of Cluster Glass and Griffiths‐like Phase in Fe₃O₄Nanostructures