Spin-lattice coupling induced crossover from negative to positive magnetostriction in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>EuTiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>

Reuvekamp, P.; Kremer, Reinhard K.; Köhler, Jürgen; Bussmann‐Holder, A.

doi:10.1103/physrevb.90.094420

Cited by 28 publications

(33 citation statements)

References 23 publications

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“…In the monoclinic structure the additional deviation of the planar angles from 90° has the effect that two Eu ions approach each other along the plane diagonal whereas the other two move away from each other (For details see SMC). Since we have recently shown that the transition to antiferromagnetic order at low temperature is accompanied by tiny but significant contractions of the lattice15, demonstrating that the Eu-Eu distance is decisive for the spin alignement, similar effects must be the origin of the enormous sensitivity of ETO to small magnetic fields. Increasing the field introduces an additional symmetry lowering already in the tetragonaal phase since [100] and [010] differ considerably from each other.…”

Section: Resultsmentioning

confidence: 98%

“…In order to explore the properties of ETO around and below T* and derive the symmetry of the structure, the birefringence data were taken in a magnetic field with the field direction being rotated such that H was parallel to [100], [010], [110], [1–10], respectively. For this purpose the Metripol Birefringence Imaging System (Oxford Cryosystems)15 has been modified to admit the application of a magnetic field. Further details about the birefringence measurements and the Metripol system are given in the supplementary material SM B.…”

Section: Resultsmentioning

confidence: 99%

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Transparent EuTiO3 films: a possible two-dimensional magneto-optical device

Bussmann‐Holder

Roleder

Stuhlhofer

et al. 2017

Sci Rep

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The magneto-optical activity of high quality transparent thin films of insulating EuTiO3 (ETO) deposited on a thin SrTiO3 (STO) substrate, both being non-magnetic materials, are demonstrated to be a versatile tool for light modulation. The operating temperature is close to room temperature and allows for multiple device engineering. By using small magnetic fields birefringence of the samples can be switched off and on. Similarly, rotation of the sample in the field can modify its birefringence Δn. In addition, Δn can be increased by a factor of 4 in very modest fields with simultaneously enhancing the operating temperature by almost 100 K.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Transparent EuTiO3 films: a possible two-dimensional magneto-optical device

Bussmann‐Holder

Roleder

Stuhlhofer

et al. 2017

Sci Rep

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“…Nevertheless, it should be kept in mind that J nn , J nnn , T N << T S . It would be necessary to analyze in some detail the magnetic field effects at high temperatures, where other field effects might take place 41…”

Section: Discussionmentioning

confidence: 99%

Tolerance Factor and Cation–Anion Orbital Interactions Differentiating the Polar and Antiferrodistortive Structures of Perovskite Oxides ABO₃

Whangbo

Gordon

Bettis

et al. 2015

Zeitschrift anorg allge chemie

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We explored under what conditions perovskite oxides ABO3 adopt a polar or an antiferrodistortive structure from the viewpoint of the tolerance factor τ and the orbital interactions of the empty orbitals of the A and B cations with the filled orbitals of their surrounding O2– ions. Polar structures require the presence of a substantial size‐mismatch as well as strong cation‐anion orbital interactions at A or B cation sites. A tetragonal polar structure is preferred when the A cation empty orbitals are extended or when the B‐cation empty orbitals are contracted. A trigonal polar structure is favored in opposite cases. An antiferrodistortive structure is found for perovskites with weak size‐mismatch or those with substantial size‐mismatch if both A and B cations do not generate strong cation‐anion orbital interactions. Antiferrodistortive structures result from interactions involving the A cations with the O4 squares of the face‐sharing AO8 square‐prisms in a two‐in‐two‐out manner, and are found only when the A/O cation‐anion interactions are substantial.

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“…Phase-pure EuTiO 3 was first synthesized in 1953 [8]. It becomes antiferromagnetic below T = 5.7 K. The respective phase transition is accompanied by a drop in the dielectric constant, owing to a strong spinlattice coupling [9], and therefore a magnetostriction effect is observed at low temperatures [10]. In addition, the development of 2D magneto-optical devices based on EuTiO 3 [11] appears possible.…”

Section: Introductionmentioning

confidence: 99%

A series of new layered lithium europium(II) oxoniobates(V) and -tantalates(V)

Funk

Köhler

Schleid

2019

Zeitschrift Für Naturforschung B

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The new Ruddlesden-Popper-related phases An+1BnO3n+1 (n = 3) with the compositions Li2Eu2Nb3O10, Li2Eu1.5Ta3O10, Li2EuKNb3O10, and Li2EuKTa3O10 were synthesized by solid-state reactions from Li2[CO3] (+ K2[CO3]) and the corresponding refractory metals along with their oxides in a high-frequency furnace at temperatures above T = 1600°C. Their structures have been determined by single-crystal X-ray diffraction studies. Characteristic features are triple layers of corner-sharing [MO6]7− octahedra (M = Nb and Ta), which are connected via [LiO4]7− tetrahedra. The Eu2+ cations are cuboctahedrally surrounded by 12 oxygen atoms and according to the Eu–O distances of around 275 pm, they have the oxidation state +2, as confirmed by XPS measurements. In the potassium-containing samples they share their positions with K+ cations. The black compounds are stable in air at room temperature. Measurements of the magnetic susceptibilities in the range of T = 5–300 K revealed Li2Eu2Nb3O10, Li2Eu1.5Ta3O10 and Li2EuKTa3O10 to be paramagnetic without any ordering.

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Spin-lattice coupling induced crossover from negative to positive magnetostriction inEuTiO3

Cited by 28 publications

References 23 publications

Transparent EuTiO3 films: a possible two-dimensional magneto-optical device

Transparent EuTiO3 films: a possible two-dimensional magneto-optical device

Tolerance Factor and Cation–Anion Orbital Interactions Differentiating the Polar and Antiferrodistortive Structures of Perovskite Oxides ABO₃

A series of new layered lithium europium(II) oxoniobates(V) and -tantalates(V)

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Spin-lattice coupling induced crossover from negative to positive magnetostriction inEuTiO3

Cited by 28 publications

References 23 publications

Transparent EuTiO3 films: a possible two-dimensional magneto-optical device

Transparent EuTiO3 films: a possible two-dimensional magneto-optical device

Tolerance Factor and Cation–Anion Orbital Interactions Differentiating the Polar and Antiferrodistortive Structures of Perovskite Oxides ABO3

A series of new layered lithium europium(II) oxoniobates(V) and -tantalates(V)

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Tolerance Factor and Cation–Anion Orbital Interactions Differentiating the Polar and Antiferrodistortive Structures of Perovskite Oxides ABO₃