Magnetostructural transition in Ce(Fe0.975Ga0.025)2 compound

Haldar, Arabinda; Singh, Niraj K.; Mudryk, Yaroslav; Nayak, Ajaya K.; Суреш, К. Г.; Nigam, A. K.; Pecharsky, V. K.

doi:10.1063/1.3365064

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…4 Such a phase co-existence is also observed in magneto-structural studies in doped CeFe 2 . 5 While there are many studies on the effect of purely chemical disorder on the metamagnetic transition, 6,7 it is not clear how crystalline defects influence this transition. Crystalline defects can be easily introduced by fast neutron or ion irradiation.…”

Section: Introductionmentioning

confidence: 99%

Effect of fast neutron irradiation induced defects on the metamagnetic transition In Ce(Fe0.96Ru0.04)2

Prajapat

Dube

Rajarajan

et al. 2012

Journal of Applied Physics

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A-site disorder driven sharp field-induced transition and collapse of charge ordering in Sm1/2Ca1/2-xSrxMnO3 J. Appl. Phys. 112, 073905 (2012) Cross-plane electronic and thermal transport properties of p-type La0.67Sr0.33MnO3/LaMnO3 perovskite oxide metal/semiconductor superlattices J. Appl. Phys. 112, 063714 (2012) Experimental evidences of the conservation of the S=1 moment in La2RuO5 determined by perturbed angular correlations J. Appl. Phys. 112, 063915 (2012) Effect of thermal cycle on the interfacial antiferromagnetic spin configuration and exchange bias in Ni-Mn-Sb alloy AIP Advances 2, 032181 (2012) Study of ferromagnetic transition in Pd nanometer-scale constrictions using a mechanically controllable break junction technique Effect of fast neutron irradiation induced defects on the anti-ferromagnetic (AFM) to ferromagnetic (FM) transition in Ce(Fe 0.96 Ru 0.04 ) 2 is studied by magnetic measurements. We observe that at a given temperature, AFM-FM transition occurs at a lower field in irradiated specimens compared to that in pristine samples. While irradiation does not seem to affect the hysteresis of the transition, zero field susceptibility is enhanced by more than an order of magnitude. Analysis of reversible magnetization vs field data at low fields indicates superparamagnetic behavior of nano-sized FM domains, which are conjectured to nucleate on the crystal defects produced by the fast neutron irradiation. The number density and size of the nano-sized domains in the irradiated and pristine samples are estimated from the magnetization data. V C 2012 American Institute of Physics.

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Section: Introductionmentioning

confidence: 99%

Effect of fast neutron irradiation induced defects on the metamagnetic transition In Ce(Fe0.96Ru0.04)2

Prajapat

Dube

Rajarajan

et al. 2012

Journal of Applied Physics

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“…Our previous XRD studies in magnetic field have shown that the sample completely transforms from rhombohedral to cubic on application of magnetic field. 8 Therefore, we have analyzed the data at T ¼ 30 K in 60 kOe field using Fd 3m space group. The ferromagnetic moment is confined to Fe alone.…”

Section: Resultsmentioning

confidence: 99%

“…3,7 Temperature and field variations of x-ray diffraction (XRD) analysis on this system clearly establish the fact that antiferromagnetic phase transition is associated with a structural phase transformation from cubic to rhombohedral phase. 8 By comparing various dopants that stabilize the low temperature AFM state, we have found that Si doping causes better stabilization of the AFM state. Though there are a few reports on the magnetic structures of other doped CeFe 2 compounds, 6 no such reports are available on Si doped compounds.…”

Section: Introductionmentioning

confidence: 93%

High field neutron diffraction study in Ce(Fe0.95Si0.05)2 compound

Haldar

Das

Hoser³

et al. 2011

Journal of Applied Physics

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Si substitution at Fe site causes the ferromagnetic to antiferromagnetic (AFM) transition at low temperatures in CeFe 2. We have carried out temperature and field variation of neutron diffraction measurements on Ce(Fe 0.95 Si 0.05) 2 to unravel its magnetic structure along with its lattice structure. The Curie temperature (T C) and the Neel temperature (T N) are 184 and 82 K, respectively. Above T N , it exhibits a cubic (Fd 3m) structure. On lowering the temperature below T N , weak superlattice reflections are observed indicating the onset of AFM ordering accompanied by a rhombohedral distortion. The crystal structure in the AFM state is refined in R 3m space group. V

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“…In addition, the magnetic and electronic properties reveal particularly flexible in terms of saturation magnetization, ordering temperature, and type of transition order. The RFe 2 series exhibit ferri-magnetic arrangements with rather high ordering temperatures (second order type) and compensation points when M R (T) = −M TM (T) [20][21][22][23]. Interestingly, in the RCo 2 binaries, the magnetic polarization on Co is typically driven by its itinerant electron character leading to rather low ordering temperature that was reported being of first order type [15].…”

Section: Introductionmentioning

confidence: 85%

Magnetic and Magnetocaloric Effect of Laves Phase Compounds Er(Fe0.8−xMn0.2−yCox+y)2 with x, y = 0.0 or 0.1

Othmani

Chaaba²,

Haj-Khlifa

et al. 2020

Metals

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Magnetic and magnetocaloric effect (MCE) of the Er(Fe0.8−xMn0.2−yCox+y)2 Laves phase-type compounds have been investigated. X-ray diffraction (XRD) analysis has revealed that these compounds crystallize with the C15 type Laves phase structure (Space Group Fd-3m). The magnetization curves indicate a ferri-magnetic-ordering resulting of the antiparallel coupling between the moments of the heavy rare earth Er and the transition metal (TM). The partial substitution of Fe/Mn by Co increases the Curie temperature from 355 K for Er(Fe0.8Mn0.2)2 to 475, 550, and 555 K for Er(Fe0.7Mn0.2Co0.1)2, Er(Fe0.8Mn0.1Co0.1)2, and Er(Fe0.7Mn0.1Co0.2)2, respectively. According to the nature of the TM elements, arguments were presented forwards either Molecular Field or Spin Fluctuation Theory, even Stoner type pictures should be considered for. MCE was calculated according to the Maxwell relation based on isotherm magnetization measurements. The magnetic entropy change (−∆SM) observed on a 300–400 K temperature range can be understood in terms of a Spin Fluctuation Theory picture supported by both the different magnetic polarization levels that were shared by the TM elements and the related interatomic exchange forces.

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Magnetostructural transition in Ce(Fe0.975Ga0.025)2 compound

Cited by 5 publications

References 23 publications

Effect of fast neutron irradiation induced defects on the metamagnetic transition In Ce(Fe0.96Ru0.04)2

Effect of fast neutron irradiation induced defects on the metamagnetic transition In Ce(Fe0.96Ru0.04)2

High field neutron diffraction study in Ce(Fe0.95Si0.05)2 compound

Magnetic and Magnetocaloric Effect of Laves Phase Compounds Er(Fe0.8−xMn0.2−yCox+y)2 with x, y = 0.0 or 0.1

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