Coercivity and exchange bias of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>Mn</mml:mtext></mml:mrow><mml:mrow><mml:mn>0.25</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Ti</mml:mtext></mml:mrow><mml:mrow><mml:mn>1.1</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mtext>S</mml:mtext><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>in the cluster-glass state

Shand, Paul; Rash, T.; Streicher, M.; Kidd, Tim; Boyle, Kayla R.; Strauss, Laura

doi:10.1103/physrevb.82.214413

Cited by 18 publications

(17 citation statements)

References 51 publications

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“…17 These highly charged ions will alter the distribution of the magnetic ions that may also be present as intercalants, which in turn will impact the magnetic characteristics of the system. 6 In this paper, we present experimental evidence that the spin-glass-like relaxation behavior that we have observed in Mn 0.09 Ti which was explained on the basis of an exponential distribution of dipolar clusters. 19 In analogy with our findings for the Mn 0.09 Ti 1.1 S 2 magnetic systems, we posit that an exponential distribution of dipolar clusters in the ferroelectric relaxors is also due to chain-like or quasi-onedimensional structures formed by the polar units.…”

Section: Introductionmentioning

confidence: 91%

“…The fabrication details have been discussed in previous publications. 6,20 After growth, the structural properties of the samples were investigated with powder x-ray diffraction (PXRD) and energy dispersive x-ray spectroscopy (EDX). The PXRD measurements were taken with Cu Kα radiation on finely ground powder that had been passed through a 200-mesh (75-micron) sieve.…”

Section: Methodsmentioning

confidence: 99%

“…[1][2][3][4][5][6] These materials exhibit a variety of electronic and magnetic properties resulting from the interplay between the quasi-twodimensional anisotropic layered structure of the host and the electronic and magnetic characteristics of the intercalated ions. The intercalant ions are incorporated in the van der Waals gaps between the Ch-T-Ch trilayer slabs, which are stacked along the c axis.…”

Section: Introductionmentioning

confidence: 99%

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Coulomb-driven cluster-glass behavior in Mn-intercalated Ti1+yS2

et al. 2012

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Section: Introductionmentioning

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coulomb-driven cluster-glass behavior in Mn-intercalated Ti1+yS2

et al. 2012

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“…We note that the value of T SG ∼ 25.2 K obtained from T f (H ) versus H 2/3 plot is closer to that obtained from power-law/Vogel-Fulcher spin dynamics. The AT line has been reported for both the canonical SG as well as CSG systems using field dependence of either T irr (H ) [83][84][85] or T f (H ) [30,[86][87][88][89] and represents the boundary between the high-temperature ergodic and low-temperature nonergodic phases. While the original formulation for the AT line was for Ising spins [79], subsequent theoretical papers have shown that it can occur in Heisenberg systems also if the single-ion anisotropy is low and positive [82].…”

Section: Evidence For the Existence Of De Almeida-thouless Line Inmentioning

confidence: 99%

Evidence for cluster spin glass phase with precursor short-range antiferromagnetic correlations in the B -site disordered Ca(Fe1/2
Kumar
¹
,
Senyshyn
²
,
Pandey
³

2019
Phys. Rev. B
38
7
21
0
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The origin of the spin glass (SG) phase in the well-known multiferroic Pb(Fe 1/2 Nb 1/2)O 3 compound remains controversial due to the complications introduced by the coexistence of SG and long-range ordered (LRO) antiferromagnetic (AFM) phases. We have addressed this controversy through a comprehensive study on a Pb-free system Ca(Fe 1/2 Nb 1/2)O 3 (CFN) which does not exhibit LRO AFM transition. The SG transition in CFN is confirmed by the appearance of a cusp in the temperature dependence of dc magnetization M(T) with a SG freezing temperature T f ∼ 25 K, and bifurcation of the zero-field-cooled and field-cooled magnetization M(T) below the irreversibility temperature T irr ∼ 27 K. Using ac susceptibility [χ (ω, T)] measurements, we show that the spin dynamics follows power/Vogel-Fulcher law-type critical dynamics which diverges at T SG ∼ 24 K with an attempt time τ o ∼ 10 −6 s suggesting cluster spin glass (CSG) behavior. The field dependence of T f (H) and T irr (H) is shown to follow the de Almeida-Thouless line which separates the ergodic and nonergodic phases in the H-T plane and gives T f (H = 0) ∼ 25 K, which is in close agreement with T SG obtained from χ (ω, T). The existence of the glassy phase below T SG is further confirmed by the observation of slow nonexponential decay of thermoremanent magnetization with time, memory and rejuvenation effects, and unidirectional exchange-bias effect in the M-H hysteresis loop of field-cooled samples. The neutron powder-diffraction patterns reveal the absence of any magnetic peak due to LRO AFM phase but show a broad diffuse peak due to the presence of ∼ 2-nm-size AFM spin clusters which are responsible for the CSG freezing in CFN.

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“…X-ray photoemission spectroscopy (XPS) is recorded with a spectrometer of Omicron Nanotechnology. The Mössbauer spectrum is recorded in a transmission geometry using a 57 Co source fixed in a Rh matrix, where a Wissel velocity drive unit is used in a constant acceleration mode. The Mössbauer parameters are estimated with respect to the α-Fe.…”

Section: Resultsmentioning

confidence: 99%

Rhombohedral distortion-driven ferroelectric order and exchange bias effect in geometrically frustrated ZnFe2O4

Dey

Chatterjee

Dippel

et al. 2021

Phys. Rev. Materials

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The rhombohedral distortion-driven occurrence of the spontaneous electric polarization at a reasonably high temperature (T ) and an exchange bias (EB) effect below the antiferromagnetic (AFM) Néel temperature (T N ) are revealed in ZnFe 2 O 4 . We observe the magnetic memory effect, suggesting a cooperative glassy magnetic state below T N . The phase separation between the long-range AFM and the glassy magnetic component leads to the EB effect below T N . The synchrotron diffraction studies confirm a structural transition to a polar R3m structure from the cubic spinel structure, involving a strong rhombohedral distortion. This distortion correlates with the occurrence of the spontaneous electric polarization (P) below ∼110 K (T FE1 ), which is accompanied by a short-range order (SRO). The P-value enhances further due to an additional rhombohedral distortion below T N . A considerable magnetoelectric (ME) coupling is detected below T FE1 . The increase of P is ∼7.2% for 5 T at the liquid nitrogen temperature. There has been a fundamental interest among the community in the unique result of the occurrence of ferroelectric (FE) order coexisting with SRO and having a significant ME coupling, which is accompanied by a strong rhombohedral structural distortion analogous to that observed in BiFeO 3 .

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Coercivity and exchange bias ofMn0.25Ti1.1S2in the cluster-glass state

Cited by 18 publications

References 51 publications

Coulomb-driven cluster-glass behavior in Mn-intercalated Ti1+yS2

Coulomb-driven cluster-glass behavior in Mn-intercalated Ti1+yS2

Evidence for cluster spin glass phase with precursor short-range antiferromagnetic correlations in the B -site disordered Ca(Fe1/2
Kumar
¹
,
Senyshyn
²
,
Pandey
³

2019
Phys. Rev. B
38
7
21
0
View full text Add to dashboard Cite

Rhombohedral distortion-driven ferroelectric order and exchange bias effect in geometrically frustrated ZnFe2O4

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Coercivity and exchange bias ofMn0.25Ti1.1S2in the cluster-glass state

Cited by 18 publications

References 51 publications

Coulomb-driven cluster-glass behavior in Mn-intercalated Ti1+yS2

Coulomb-driven cluster-glass behavior in Mn-intercalated Ti1+yS2

Evidence for cluster spin glass phase with precursor short-range antiferromagnetic correlations in the B -site disordered Ca(Fe1/2Kumar1, Senyshyn2, Pandey3 2019Phys. Rev. B387210View full textAdd to dashboardCite

Rhombohedral distortion-driven ferroelectric order and exchange bias effect in geometrically frustrated ZnFe2O4

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Product

Resources

About

Evidence for cluster spin glass phase with precursor short-range antiferromagnetic correlations in the B -site disordered Ca(Fe1/2
Kumar
¹
,
Senyshyn
²
,
Pandey
³

2019
Phys. Rev. B
38
7
21
0
View full text Add to dashboard Cite