Magnetic phase separation and cluster-spin-glass behavior in LaMn1−xFexO3+y

Lima, Orlando Fontes; Coaquira, J. A. H.; Almeida, R.L. de; Malik, S.K.

doi:10.1063/1.3364056

Cited by 25 publications

(14 citation statements)

References 17 publications

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“…Small hysteresis (reminiscent of ferromagnetic interaction) at low fields ( $ 1 T) is also seen for 10 K data. Similar ferromagnetism has also been observed in BFO nanoparticles, which is ascribed to uncompensated spins of spinoidal structure due to small size of particle [20]. The M2H plot for X¼0.01 displays linear behaviour at 10 K with slight nonlinearity at 300 K for lower fields ( o1 T).…”

Section: Magnetizationsupporting

confidence: 50%

“…The ZFC curve for both the samples decreases continuously with lowering of temperature whereas FCW data increases with lowering of temperature. Such behaviour has been identified to be cluster glass behaviour [10,[17][18][19][20]. A careful observation of ZFC data of both the cobalt doped BFO at 0.1 T shows an inflection point near T $ 150 K. Such inflection points are not seen in the magnetization data of either parent BFO or Co-doped BFO under 1 T magnetic field.…”

Section: Magnetizationmentioning

confidence: 87%

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Effect of Co substitution on the magnetic properties of BiFeO3

Ray

Biswal

Acharya

et al. 2012

Journal of Magnetism and Magnetic Materials

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Section: Magnetizationsupporting

confidence: 50%

Section: Magnetizationmentioning

confidence: 87%

Effect of Co substitution on the magnetic properties of BiFeO3

Ray

Biswal

Acharya

et al. 2012

Journal of Magnetism and Magnetic Materials

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“…The XMCD results on BFMO clearly demonstrated the formation of FM Mn-rich clusters in AF Fe-rich matrix, indicating the cluster spin glass34, as the schematic diagram shown in Fig. 5(b).…”

Section: Discussionmentioning

confidence: 77%

“…Furthermore, if FM clusters are considered as macroscopic spins with competing interactions, spin glass behavior can be observed, termed to cluster spin glass34. These spin systems qualitatively exhibit similar and characteristic variations of magnetizations35.…”

Section: Resultsmentioning

confidence: 99%

Magnetic interactions in BiFe0.5Mn0.5O3 films and BiFeO3/BiMnO3 superlattices

Sheng

Khalid

et al. 2015

Sci Rep

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The clear understanding of exchange interactions between magnetic ions in substituted BiFeO3 is the prerequisite for the comprehensive studies on magnetic properties. BiFe0.5Mn0.5O3 films and BiFeO3/BiMnO3 superlattices have been fabricated by pulsed laser deposition on (001) SrTiO3 substrates. Using piezoresponse force microscopy (PFM), the ferroelectricity at room temperature has been inferred from the observation of PFM hysteresis loops and electrical writing of ferroelectric domains for both samples. Spin glass behavior has been observed in both samples by temperature dependent magnetization curves and decay of thermo-remnant magnetization with time. The magnetic ordering has been studied by X-ray magnetic circular dichroism measurements, and Fe-O-Mn interaction has been confirmed to be antiferromagnetic (AF). The observed spin glass in BiFe0.5Mn0.5O3 films has been attributed to cluster spin glass due to Mn-rich ferromagnetic (FM) clusters in AF matrix, while spin glass in BiFeO3/BiMnO3 superlattices is due to competition between AF Fe-O-Fe, AF Fe-O-Mn and FM Mn-O-Mn interactions in the well ordered square lattice with two Fe ions in BiFeO3 layer and two Mn ions in BiMnO3 layer at interfaces.

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“…Further same characteristic frequency fitted our data reasonably well (Fig.6). Very recently, in case of Fe doped LaMnO 3 , it is clearly mentioned that choice of characteristic relaxation time τ 0 (2π/ω o ) or frequency (ω o /2π) makes a difference in deciding about the presence of SG or cluster-spin-glass (CSG) states [28].…”

Section: Resultsmentioning

confidence: 99%

Study of spin glass and cluster ferromagnetism in RuSr2Eu1.4Ce0.6Cu2O10-δ magneto superconductor

Kumar

Tandon

Awana³

2011

Journal of Applied Physics

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We report DC magnetization, detailed systematic linear and nonlinear AC magnetic susceptibility and transport for a single phase RuSr 2 Eu 1.4 Ce 0.6 Cu 2 O 10-δ (EuRu-1222) magnetosuperconductor. The studied sample is synthesized through standard solid state reaction route, which is crystallized in single phase tetragonal structure with space group I4/mmm. DC magnetic susceptibility measurements revealed that the studied EuRu-1222 is a magneto-superconductor with Ru spins ordering at around 110 K and superconductivity in the Cu-O 2 planes below ≈ 30 K. Temperature dependence of AC susceptibility with different frequency and amplitude variations confirms spin-glass behavior with cluster ferromagnetism of the system. Change in the cusp position with frequency follows the Vogel-Fulcher law, which is commonly accepted feature for a spin-glass (SG) system with ferromagnetic clusters. The third harmonic of AC susceptibility (χ 3 ) shows that the system undergoes a spin glass transition below 80 K.Superconducting transition temperature (T c ) onset and ρ = 0 are seen at around 30 and 18 K without any applied field and the same decreases to 10 and 2 K under 130 kOe applied field.Also low fields isothermal (MH) suggests that ferromagnetic clusters are embedded in spin-glass (SG) matrix. The magnetization vs. applied field (MH) loops exhibited ferromagnetic (FM) like behavior with rather small coercive fields. Detailed AC magnetic susceptibility measurements are carried out to unearth the short range magnetic correlations. These results support the spin-glass (SG) formation followed by ferromagnetic clustering effects at low temperatures. Our detailed magnetization and magneto transport results will undoubtedly contribute to current understanding of the complex magnetism of the EuRu-1222 system. PACS Nos. 74.70 Pq, 75.30Cr, 74.25 IntroductionThe magnetic properties of rutheno-cuprates, which belongs to the class of high temperature superconductors (HTSc), had raised significant interest in scientific community due to the presence of Ru ion magnetic order being co-existing with superconductivity. Co One of the challenging issues with these compounds is their synthesis in single phase and understanding of their complex magnetism. Our aim is to probe the complex magnetic nature of this compound using bulk susceptibility measurements. We concentrated on some aspects, which we feel are important to unearth the complex magnetism of these systems. AC susceptibility and its various harmonic studies is one of the best tools to analyze such type of magnetically complicated systems. The magnetization measured in the presence of an excitation field (AC field) can be written as power law [17]Where χ 1 , χ 2 , χ 3 are the first, second, third order harmonics of the AC susceptibility respectively [17,25], providing useful information about the dynamics of existing/competing magnetic order.Although, frequency dependence of the peak and slow magnetic relaxation are generic features of both SG and SPM, the physics behind them is differen...

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Magnetic phase separation and cluster-spin-glass behavior in LaMn1−xFexO3+y

Cited by 25 publications

References 17 publications

Effect of Co substitution on the magnetic properties of BiFeO3

Effect of Co substitution on the magnetic properties of BiFeO3

Magnetic interactions in BiFe0.5Mn0.5O3 films and BiFeO3/BiMnO3 superlattices

Study of spin glass and cluster ferromagnetism in RuSr2Eu1.4Ce0.6Cu2O10-δ magneto superconductor

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