Magnetic and neutron diffraction study of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ba</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi ma

Beznosov, A. B.; Desnenko, V. A.; Fertman, E. L.; Ritter, C.; Khalyavin, D. D.

doi:10.1103/physrevb.68.054109

Cited by 40 publications

(47 citation statements)

References 32 publications

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“…Thus, in this compound a first-order martensitic type, charge-ordering phase transformation takes place at T CO  212 K [32]. This results in coexistence of self-organized charge-ordered (CO) and charge-disordered (CD) phases in a wide temperature range, as evidenced by an extended temperature hysteresis of the magnetic susceptibility in the CO region.…”

mentioning

confidence: 87%

Exchange bias in phase-segregated Nd2/3Ca1/3MnO3 as a function of temperature and cooling magnetic fields

Fertman

Dolya

Desnenko

et al. 2014

Journal of Applied Physics

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Exchange bias (EB) phenomena have been observed in Nd 2/3 Ca 1/3 MnO 3 colossal magnetoresistance perovskite below the Curie temperature T C ~ 70 K and attributed to an antiferromagnetic (AFM) -ferromagnetic (FM) spontaneous phase segregated state of this compound. Field cooled magnetic hysteresis loops exhibit shifts toward negative direction of the magnetic field axis. The values of exchange field H EB and coercivity H C are found to be strongly dependent of temperature and strength of the cooling magnetic field H cool . These effects are attributed to evolution of the FM phase content and a size of FM clusters. A contribution to the total magnetization of the system due to the FM phase has been evaluated. The exchange bias effect decreases with increasing temperature up to T C and vanishes above this temperature with disappearance of FM phase.Relaxation of a non-equilibrium magnetic state of the compound manifests itself through a training effect also observed while studying EB in Nd 2/3 Ca 1/3 MnO 3 .

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mentioning

confidence: 87%

Exchange bias in phase-segregated Nd2/3Ca1/3MnO3 as a function of temperature and cooling magnetic fields

Fertman

Dolya

Desnenko

et al. 2014

Journal of Applied Physics

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“…As is known from the literature, the change in the ionic radius of the doping element leads to the change in the unit cell volume, in the bond angle of Mn-O-Mn [3,8,[25][26][27][28], and in the orbital overlapping [29]. This implies that the orbital overlapping is different for the different type of the doping element.…”

Section: +mentioning

confidence: 94%

“…Lanthanum manganites doped with a divalent element have a colossal magnetoresistance (CMR) [1][2][3], and therefore, they are widely used in different fields of techniques. Lanthanum manganites are also used as cathode materials in fuel energetics, since they have a high electron-ionic conductivity.…”

Section: Introductionmentioning

confidence: 99%

The features of structural transformations in lanthanum manganites La1−xAxMnO3+δ (A = Ca, Sr, Ba)

Sedykh¹

2014

AIP Conference Proceedings

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Abstract. In this work, the effect of the ionic radius and concentration of a doping element on the features of the structural transformations in polycrystalline lanthanum manganites, La 1-x A x MnO 3+ (A = Ca, Sr, Ba), has been studied by Mössbauer spectroscopy and X-ray diffraction analysis. For Mössbauer investigations, a small amount of 57 Fe (2 at%) Mössbauer isotope was introduced into the samples. It follows from the analysis of the obtained data that both common features of the structural transformations and differences between them exist in lanthanum manganites depending on ionic radius and concentration of a doping element.

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“…2,4,5,8 Phase separation in manganites may have two origins: 1) electronic (microscopic) phase separation between phases with different charge carrier densities, which result in nanometer scale coexisting clusters, and 2) disorder-induced phase separation with percolative characteristics between equal-density phases, driven by disorder near first-order phase transitions. 2,[9][10][11][12][13][14][15] The latter leads to coexisting clusters as large as a micrometer in size. It has become clear by now that first-order phase transformations, which result in the coexistence of two crystalline phases in a wide temperature range (so-called martensitic transformations), play an important role in the physics of manganites.…”

Section: Introductionmentioning

confidence: 99%

Structural phase transition in La2/3Ba1/3MnO3 perovskite: Elastic, magnetic, and lattice anomalies and microscopic mechanism

et al. 2015

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Magnetic and charge ordering in nanosized manganites Applied Physics Reviews 1, 031302 (2014) The temperature dependences of the elastic and magnetic properties of polycrystalline perovskite manganite La 2/3 Ba 1/3 MnO 3 were studied using ultrasonic and SQUID magnetometer techniques. The minimum of the temperature-dependent sound velocity v(T) and corresponding maximum of the decrement δ(T) were found in the vicinity of the structural phase transition R3c ↔ Imma at T s ∼ 200 K. Large alterations of v and δ indicate a structural phase transition of the soft mode type. A high sensitivity of dc magnetization to a low uniaxial pressure caused by the softening was found in the T s region. A negative value of the linear thermal expansion coefficient along one of the crystallographic axis was found in the Imma phase near T s . The proposed microscopic mechanism explains the appearance of the soft mode in the vicinity of the structural phase transition temperature associated with the displacement of the manganese atom from the center of the oxygen octahedron. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx

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Magnetic and neutron diffraction study ofLa2/3Ba1/3

Cited by 40 publications

References 32 publications

Exchange bias in phase-segregated Nd2/3Ca1/3MnO3 as a function of temperature and cooling magnetic fields

Exchange bias in phase-segregated Nd2/3Ca1/3MnO3 as a function of temperature and cooling magnetic fields

The features of structural transformations in lanthanum manganites La1−xAxMnO3+δ (A = Ca, Sr, Ba)

Structural phase transition in La2/3Ba1/3MnO3 perovskite: Elastic, magnetic, and lattice anomalies and microscopic mechanism

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