Magnetocaloric effect in epitaxial La0.56Sr0.44MnO3 alloy and digital heterostructures

Belyea, Dustin D.; Santos, Tiffany S.; Miller, Casey W.

doi:10.1063/1.3677670

Cited by 13 publications

(9 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This pioneering study indicated that artificial oxide superlattices/multilayers might provide an alternative pathway in the search for efficient roomtemperature magnetic refrigerators for (nano) microscale systems. 19,144 Other epitaxial thin films were presented in 2012 by Goktas et al 145 when they deposited manganite La 0.67 Ag 0.33 MnO 3 (LAgMO) and La 0.67 K 0.33 MnO 3 (LKMO) films on the top of LaAlO 3 (1 0 0) and quartz substrates by using the sol-gel dip-coating technique. This work showed that the LAgMO and LKMO epitaxial films present different metal-insulator transition temperatures (T-MI) and PM-FM phase transition temperatures (T C ).…”

Section: H Abo 3 Perovskitesmentioning

confidence: 99%

Magnetocaloric materials: From micro- to nanoscale

et al. 2018

View full text Add to dashboard Cite

show abstract

Section: H Abo 3 Perovskitesmentioning

confidence: 99%

Magnetocaloric materials: From micro- to nanoscale

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In general, the spatial locations of the chemical dopants are random, which generates a certain kind of disorder in the system. For CMR mangnanites, it has been shown that the ordering of chemical dopants, or the cation ordering has strong influence on the physical properties for both bulk11121314151617 and superlattice structures181920212223242526. However, very few work has dealt the correlation between cation ordering and the electronic phase separation (EPS)27, despite of the fact that EPS is important for both understanding the mechanism of strong electronic correlation and for tuning the physical properties.…”

mentioning

confidence: 99%

Chemical ordering suppresses large-scale electronic phase separation in doped manganites

Zhu

Niu

et al. 2016

Nat Commun

View full text Add to dashboard Cite

For strongly correlated oxides, it has been a long-standing issue regarding the role of the chemical ordering of the dopants on the physical properties. Here, using unit cell by unit cell superlattice growth technique, we determine the role of chemical ordering of the Pr dopant in a colossal magnetoresistant (La1−yPry)1−xCaxMnO3 (LPCMO) system, which has been well known for its large length-scale electronic phase separation phenomena. Our experimental results show that the chemical ordering of Pr leads to marked reduction of the length scale of electronic phase separations. Moreover, compared with the conventional Pr-disordered LPCMO system, the Pr-ordered LPCMO system has a metal–insulator transition that is ∼100 K higher because the ferromagnetic metallic phase is more dominant at all temperatures below the Curie temperature.

show abstract

“…24,25 Such artificial multiferroic devices, composed of a piezoelectric and a Gd 5 (Si,Ge) 4 magnetostrictive material, have already presented promising properties for energy harvesting purposes at the micrometric scale. Despite their properties, Gd 5 (Si x Ge 1Àx ) 4 materials were left behind in the nanoscalling race, whereas an increasing number of works have been published on Gd multilayers, 27,28 manganites, [29][30][31] FeRh, 32,33 NiMnGa, 34 and MnAs 35,36 materials and also on the MEMS development and numerical simulations. 22,[37][38][39][40] Concerning the Gd 5 (Si x Ge 1Àx ) 4 materials, there is only one not-successful report of a Gd 5 (Si x Ge 1Àx ) 4 thin film.…”

mentioning

confidence: 99%

Gd5(Si,Ge)4 thin film displaying large magnetocaloric and strain effects due to magnetostructural transition

Hadimani

Silva

Pereira

et al. 2015

Applied Physics Letters

View full text Add to dashboard Cite

Magnetic refrigeration based on the magnetocaloric effect is one of the best alternatives to compete with vapor-compression technology. Despite being already in its technology transfer stage, there is still room for optimization, namely, on the magnetic responses of the magnetocaloric material. In parallel, the demand for different magnetostrictive materials has been greatly enhanced due to the wide and innovative range of technologies that emerged in the last years (from structural evaluation to straintronics fields). In particular, the Gd5(SixGe1−x)4 compounds are a family of well-known alloys that present both giant magnetocaloric and colossal magnetostriction effects. Despite their remarkable properties, very few reports have been dedicated to the nanostructuring of these materials: here, we report a ∼800 nm Gd5Si2.7Ge1.3 thin film. The magnetic and structural investigation revealed that the film undergoes a first order magnetostructural transition and as a consequence exhibits large magnetocaloric effect (−ΔSmMAX ∼ 8.83 J kg−1 K−1, ΔH = 5T) and giant thermal expansion (12000 p.p.m). The thin film presents a broader magnetic response in comparison with the bulk compound, which results in a beneficial magnetic hysteresis reduction. The ΔSmMAX exhibited by the Gd5(Si,Ge)4 thin film makes it a promising candidate for micro/nano magnetic refrigeration area.

show abstract

Magnetocaloric effect in epitaxial La0.56Sr0.44MnO3 alloy and digital heterostructures

Cited by 13 publications

References 19 publications

Magnetocaloric materials: From micro- to nanoscale

Magnetocaloric materials: From micro- to nanoscale

Chemical ordering suppresses large-scale electronic phase separation in doped manganites

Gd5(Si,Ge)4 thin film displaying large magnetocaloric and strain effects due to magnetostructural transition

Contact Info

Product

Resources

About