Hexagonal versus perovskite phase of manganite<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi><mml:mi mathvariant="normal">Mn</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo>(</mml:mo><mml:mi>R</mml:mi><mml:mo>=</mml:mo><mml:mi mathvariant="normal">Y</mml:mi><mml:mo>,</mml:mo><mml:mspace width="0.3em" />

Zhou, Jianshi; Goodenough, John B; Gallardo‐Amores, J. M.; Morán, E.; Alario-Franco, M.Á.; Caudillo, Román

doi:10.1103/physrevb.74.014422

Cited by 185 publications

(129 citation statements)

References 20 publications

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“…Substituting non-magnetic Ga on the Mn 3+ sites slightly increases the Curie temperature while systematically reducing the antiferromagnetic ordering temperature [16]. However, the reduction of the spin-lattice interactions in the Ga doped system increases the thermal conductivity, despite the introduction of additional impurity scattering [17].…”

Section: Introductionmentioning

confidence: 99%

Suppression of multiferroic order in hexagonal ceramics

Dixit

Smith

Subramanian

et al. 2010

Solid State Communications

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We have investigated the effects of substituting In for Mn on the antiferromagnetic phase transition in YMnO 3 using magnetic, dielectric, and specific heat measurements. We prepared a set of isostructural phase pure hexagonal YMn 1-x In x O 3 samples having x=0 to x=0.9, which exhibit a systematic decrease of the antiferromagnetic ordering temperature with increasing In content. The multiferroic phase, which develops below T N , appears to be completely suppressed for x≥0.5 in the temperature range investigated, which can be attributed solely to the dilution of magnetic interactions as the crystal structure remains hexagonal. Similar to previous reports, we find an enhancement of the magnetocapacitive coupling on dilution with non-magnetic ions.

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Section: Introductionmentioning

confidence: 99%

Suppression of multiferroic order in hexagonal ceramics

Dixit

Smith

Subramanian

et al. 2010

Solid State Communications

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“…Mn(x) position [38] 0.324 72 [15] 0.317 7(9) [35] 0.333 0(17) [29] 0.320 8(18) [39] (at 10 K) 0.333 5 (6) largest amount of stiffening was observed for C 66 (∼3%) and C 11 (∼1%), in comparison with C 33 and C 44 (<0.1%), corresponding to a stronger influence of magnetic interactions directed within the (001) plane rather than perpendicular to it. Using a Landau description the relevant strain/order parameter coupling term was determined to be λe 2 S 2 ⊥ , where e is a strain, λ is a strain/order parameter coupling constant, and S ⊥ is the in-plane spin component representing the magnetic order parameter.…”

Section: Referencementioning

confidence: 99%

“…Some of the most successful examples of magnetoelectric multiferroics have come from the hexagonal rare earth manganites, RMnO 3 , and significant research has been undertaken to understand the magnetic and ferroelectric properties of these compounds (see, for example, [1][2][3][4][5][6][7][8]). Of these materials YMnO 3 , with a layered structure with Y ions placed between sheets of corner sharing MnO 5 triangular bipyramids, has been of particular interest [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Elastic anomalies associated with structural and magnetic phase transitions in single crystal hexagonal YMnO₃

Thomson

Chatterji

Howard

et al. 2014

J. Phys.: Condens. Matter

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Resonant ultrasound spectroscopy has been used to measure the elastic and anelastic behaviour through known structural and magnetic phase transitions in single crystal hexagonal YMnO 3 . Anomalous elastic behaviour is observed at the high temperature structural transition at ∼1260 K, with a discontinuity in the elastic constants and nonlinear recovery below T c , consistent with λeQ 2 s coupling. There is no change in dissipation associated with this high temperature transition, and no evidence in the elastic or anelastic behaviour for any secondary transition at ∼920 K, thus supporting the thesis of a single high temperature transformation. Elastic stiffening is observed on cooling through T N , in accordance with previous studies, and the excess elastic constant appears to scale with the square of the magnetic order parameter. The strains incurred at T N are a factor of ∼20 smaller than those at the structural transition, implying very weak λeQ 2 m coupling and a dominant contribution to the variation in the elastic constants from λe 2 Q 2 m . The increased acoustic dissipation above T N is consistent with an order-disorder process.

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“…5 As the IR further decreases from Y, Ho to Lu, RMnO 3 crystallize into a hexagonal structure if crystals are grown at ambient pressure. 6 The antiferromagnetic coupling between the spins of the Mn 3+ ions within an (001) plane is frustrated, which lowers the spin-ordering Néel temperature. In the case of R = Gd, Tb and Dy, it is worth mentioning that, as the temperature decreases from the incommensurate phase, a lock-in transition takes place to enter a ferroelectric phase, 7 confirming the interplay between electric and magnetic phenomena.…”

Section: Introductionmentioning

confidence: 99%

Critical behavior of the paramagnetic to antiferromagnetic transition in orthorhombic and hexagonal phases ofRMnO3(R=Sm
Oleaga
¹
,
Salazar
²
,
Prabhakaran
³

et al. 2012
Phys. Rev. B
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The critical behavior of the paramagnetic to antiferromagnetic transition in RMnO 3 (R = Sm, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y) has been studied with an ac photopyroelectric calorimeter, which gives simultaneously the thermal diffusivity and specific heat as a function of temperature with high resolution around the Néel temperature. RMnO 3 (R = Sm, Tb, Dy) has an orthorhombic perovskite structure, whereas the other manganites are hexagonal, thus revealing a strong thermal anisotropy. SmMnO 3 with an Type-A antiferromagnetic ordering exhibits a 3D-XY critical behavior, which could be attributed to the peculiar site anisotropy of Sm 3+ and the exchange interaction between Mn 3+ and Sm 3+ ions. The sinusoidal spin ordering in TbMnO 3 and DyMnO 3 can be phenomenologically described by the 3D-Heisenberg model. Finally, the hexagonal manganites RMnO 3 (R = Ho, Er, Tm, Yb, Lu, Y) are close to the 3D-Heisenberg universality class, ruling out the chiral models predicted by the renormalization group theory.

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Hexagonal versus perovskite phase of manganiteRMnO3(R=Y,

Cited by 185 publications

References 20 publications

Suppression of multiferroic order in hexagonal ceramics

Suppression of multiferroic order in hexagonal ceramics

Elastic anomalies associated with structural and magnetic phase transitions in single crystal hexagonal YMnO₃

Critical behavior of the paramagnetic to antiferromagnetic transition in orthorhombic and hexagonal phases ofRMnO3(R=Sm
Oleaga
¹
,
Salazar
²
,
Prabhakaran
³

et al. 2012
Phys. Rev. B
Self Cite
57
6
49
0
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Hexagonal versus perovskite phase of manganiteRMnO3(R=Y,

Cited by 185 publications

References 20 publications

Suppression of multiferroic order in hexagonal ceramics

Suppression of multiferroic order in hexagonal ceramics

Elastic anomalies associated with structural and magnetic phase transitions in single crystal hexagonal YMnO3

Critical behavior of the paramagnetic to antiferromagnetic transition in orthorhombic and hexagonal phases ofRMnO3(R=SmOleaga1, Salazar2, Prabhakaran3 et al. 2012Phys. Rev. BSelf Cite576490View full textAdd to dashboardCite

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Elastic anomalies associated with structural and magnetic phase transitions in single crystal hexagonal YMnO₃

Critical behavior of the paramagnetic to antiferromagnetic transition in orthorhombic and hexagonal phases ofRMnO3(R=Sm
Oleaga
¹
,
Salazar
²
,
Prabhakaran
³

et al. 2012
Phys. Rev. B
Self Cite
57
6
49
0
View full text Add to dashboard Cite