Interfacial room temperature magnetism and enhanced magnetocaloric effect in strained 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>La</mml:mi><mml:mrow><mml:mn>0.66</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Ca</mml:mi><mml:mrow><mml:mn>0.34</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>MnO</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:msub><mml:mi>BaTiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
 heterostructures

Bingham, Nicholas S.; Suszka, A. K.; Vaz, C. A. F.; Kim, Heung Soo; Heyderman, Laura J.

doi:10.1103/physrevb.96.024419

Cited by 17 publications

(10 citation statements)

References 56 publications

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“…On the other hand, the application of a magnetic field may increase the entropy causing ΔSM > 0, for example in antiferromagnets, as the external field rotates the spins in antiparallel sublattices against their preferred direction [29][41] [42]. The magnetic entropy change has been demonstrated to be an effective tool to understand the features of the coexisting magnetic phases [29][41][42] [43]. In the following discussion, the magnetic entropy change is analyzed as a function of temperature and magnetic field across the H-T phase diagram.…”

Section: S T H M T H Htmentioning

confidence: 99%

Evidence of long-range ferromagnetic order and spin frustration effects in the double perovskite La2CoMnO6

et al. 2019

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We present a comprehensive study on the magnetic structure, dynamics, and phase evolution in the single-phase double perovskite La2CoMnO6. The mixed valence state due to oxygen deficiency is verified by X-ray photoelectron spectroscopy, and confirms a double ferromagnetic transition observed in DC magnetization. Neutron diffraction reveals that the magnetic structure is dominated by long-range ferromagnetic ordering, which is further corroborated by a critical exponents analysis of the paramagnetic to ferromagnetic phase transition. An analysis of the magnetization dynamics by means of linear and nonlinear ac magnetic susceptibilities marks the presence of two distinct cluster glass-like states that emerge at low temperatures. The isothermal entropy change as a function of temperature and magnetic field (H) is exploited to investigate the mechanism of stabilization of the magnetic phases across the H-T phase diagram. In the regime of the phase diagram where thermal energy is sufficiently low, regions of competing interactions due to local disorder become stabilized and display glasslike dynamics. The freezing mechanism of clusters is illustrated using a unique probe of transverse susceptibility that isolates the effects of the local anisotropy of the spin clusters. The

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Section: S T H M T H Htmentioning

confidence: 99%

Evidence of long-range ferromagnetic order and spin frustration effects in the double perovskite La2CoMnO6

et al. 2019

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“…15 (iii) Bingham et al have attributed the enhanced magnetocaloric effect to the strain effect from ferroelectric capping layer. 12 (iv) Herklotz et al have presented a reversible control of interfacial magnetism through ionic-liquid-assisted polarization switching. 16 Still, however, there is limited understanding of the FE field effect on orbital hybridizations affecting the interfacial magnetism and the exchange coupling, despite the observation of interfacial magnetism in FM/FE systems.…”

Section: Introduction：mentioning

confidence: 99%

“…1−3 Owing to the scarcity of single-phase materials with strong magnetoelectric coupling, the investigation of artificial multiferroic heterostructures, consisting of ferromagnetic (FM) and ferroelectric (FE) layers, has received much attention. 4−9 Extensive studies have focused on the influence of FE polarization on magnetism via strain coupling, 10−12 interfacial-oxidized state, 9 exchange coupling, 13 interfacial orbital reconstructions, 14 interfacial bond reconfiguration, 8 carrier density modulation (charge transfer), 6,12,15 or a combination of these at heterointerfaces. For example, (i) Cui et al have demonstrated a FE-polarization control of interfacial orbital reconstruction and its effect on transport of contacted films; 14 (ii) Molegraaf et al have proposed chargedensity-driven magnetic ground states; 15 (iii) Bingham et al have attributed the enhanced magnetocaloric effect to the strain effect from FE capping layer; 12 and (iv) Herklotz et al have presented a reversible control of interfacial magnetism through ionic-liquid-assisted polarization switching.…”

mentioning

confidence: 99%

“…4−9 Extensive studies have focused on the influence of FE polarization on magnetism via strain coupling, 10−12 interfacial-oxidized state, 9 exchange coupling, 13 interfacial orbital reconstructions, 14 interfacial bond reconfiguration, 8 carrier density modulation (charge transfer), 6,12,15 or a combination of these at heterointerfaces. For example, (i) Cui et al have demonstrated a FE-polarization control of interfacial orbital reconstruction and its effect on transport of contacted films; 14 (ii) Molegraaf et al have proposed chargedensity-driven magnetic ground states; 15 (iii) Bingham et al have attributed the enhanced magnetocaloric effect to the strain effect from FE capping layer; 12 and (iv) Herklotz et al have presented a reversible control of interfacial magnetism through ionic-liquid-assisted polarization switching. 16 Still, however, there is a limited understanding of the FE field effect on orbital hybridizations affecting the interfacial magnetism and the exchange coupling, despite the observation of interfacial magnetism in FM/FE systems.…”

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confidence: 99%

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Atomic-Scale Control of Magnetism at the Titanite-Manganite Interfaces

et al. 2019

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Complex oxide thin-film heterostructures often exhibit magnetic properties different from those known for bulk constituents. This is due to the altered local structural and electronic environment at the interfaces, which affects the exchange coupling and magnetic ordering. The emergent magnetism at oxide interfaces can be controlled by ferroelectric polarization and has a strong effect on spin-dependent transport properties of oxide heterostructures, including magnetic and ferroelectric tunnel junctions. Here, using prototype La2/3Sr1/3MnO3/BaTiO3 heterostructures, we demonstrate that ferroelectric polarization of BaTiO3 controls the orbital hybridization and magnetism at heterointerfaces. We observe changes in the enhanced orbital occupancy and significant charge redistribution across the heterointerfaces, affecting the spin and orbital magnetic moments of the interfacial Mn and Ti atoms. Importantly, we find that the exchange coupling between Mn and Ti atoms across the interface is tuned by ferroelectric polarization from ferromagnetic to antiferromagnetic. Our findings provide a viable route to electrically control complex magnetic configurations at artificial multiferroic interfaces, taking a step toward low-power spintronics.

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“…The modern refrigeration founded on the magnetocaloric effect (MCE) or electrocaloric effect is verified as a potential alternative technology to traditional refrigeration [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. This is due to its high effectiveness, small size, energy saving and ecologically acceptable technology.…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric properties of La0.666Sr0.373Mn0.943Cu0.018O3

Hamad

2017

PAC

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Magnetocaloric properties of La 0.666 Sr 0.373 Mn 0.943 Cu 0.018 O 3 (LSMCO) perovskite (such as magnetic entropy change, full-width at half-maximum, relative cooling power and magnetic specific heat change) at applied magnetic field of 0.05 T were calculated using the phenomenological model. The results indicate the prospective application of LSMCO due to high magnetocaloric effect near the Curie temperature. Furthermore, the magnetocaloric properties of LSMCO sample are comparable with magnetocaloric properties of MnAs film, La 1-x Cd x MnO 3 and La 1.25 Sr 0.75 MnCoO 6 , and significantly larger than that of Gd 1-x Ca x BaCo 2 O 5.5 and Ge 0.95 Mn 0.05. It is recommended that magnetocaloric effect of LSMCO can be used as a promising practical material of an apparatus based on the active magnetic regenerator cycle.

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Interfacial room temperature magnetism and enhanced magnetocaloric effect in strained La0.66Ca0.34MnO3/BaTiO3 heterostructures

Cited by 17 publications

References 56 publications

Evidence of long-range ferromagnetic order and spin frustration effects in the double perovskite La2CoMnO6

Evidence of long-range ferromagnetic order and spin frustration effects in the double perovskite La2CoMnO6

Atomic-Scale Control of Magnetism at the Titanite-Manganite Interfaces

Magnetocaloric properties of La0.666Sr0.373Mn0.943Cu0.018O3

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