Improvement of refrigerant capacity of La0.7Ca0.3MnO3 material with a few percent Co doping

Debnath, J C; Zeng, Rong; Kim, Jung Ho; Dou, Shi Xue

doi:10.1016/j.jmmm.2010.08.049

Cited by 27 publications

(11 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among them, perovskite-type manganese oxide materials having large MCE are believed to be potential candidates for magnetic refrigeration applications. [9][10][11][12][13][14][15][16] In particular, the lanthanum manganite (LaMnO 3 ) family shows the perovskite structure. Here, the transition metal atoms of pure lanthanum manganite are predominantly in the state Mn 3þ .…”

Section: Introductionmentioning

confidence: 99%

Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film

Debnath

Kim

Heo

et al. 2013

Journal of Applied Physics

View full text Add to dashboard Cite

Dou, S. X. (2013). Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film. Journal of Applied Physics, 113 (6), 063508-1-063508-6. Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film Abstract An epitaxial La0.8Ca0.2MnO3/LaAlO 3 (LCMO/LAO) thin film was fabricated using the pulsed laser deposition technique to evaluate the correlation between the crystal structure and the magnetocaloric effect. In our study, the LCMO film was 200 nm in thickness and appeared to have a strong out-of plane texture. We found that each column in the LCMO thin film layer is a domain which has a different ordering direction. These microscopic feature results in anisotropic properties of magnetization, entropy, and relative cooling power. The film exhibited a paramagnetic-to-ferromagnetic second order phase transition at 249 K. The lack of any hysteresis loss also confirmed that the material is intrinsically reversible. In addition, the large magnetization of the thin film results in an entropy change larger than those of all other perovskite type materials. Consequently, the relative cooling power is significantly enhanced. An epitaxial La 0.8 Ca 0.2 MnO 3 /LaAlO 3 (LCMO/LAO) thin film was fabricated using the pulsed laser deposition technique to evaluate the correlation between the crystal structure and the magnetocaloric effect. In our study, the LCMO film was 200 nm in thickness and appeared to have a strong out-of plane texture. We found that each column in the LCMO thin film layer is a domain which has a different ordering direction. These microscopic feature results in anisotropic properties of magnetization, entropy, and relative cooling power. The film exhibited a paramagnetic-toferromagnetic second order phase transition at 249 K. The lack of any hysteresis loss also confirmed that the material is intrinsically reversible. In addition, the large magnetization of the thin film results in an entropy change larger than those of all other perovskite type materials. Consequently, the relative cooling power is significantly enhanced. V C 2013 American Institute of Physics. [http://dx

show abstract

Section: Introductionmentioning

confidence: 99%

Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film

Debnath

Kim

Heo

et al. 2013

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…According to (2), there is a minimum of S M around T C for an isothermal magnetic entropy change due to the rapid change in magnetization around this temperature. Magnetization measurements are done at discrete intervals, and (2) can be approximated as follows:…”

Section: Magnetocaloric Propertiesmentioning

confidence: 99%

“…The magnetocaloric effect (MCE) in these materials refers to the change in the entropy in response to the change of an external magnetic field [1], and materials exhibiting such properties around room temperature have been studied Orthomanganites having the general formula Ln 1−x A x MnO 3 (Ln: rare-earth ions, A: alkaline-earth ions) have shown marked magnetoresistance and the magnetocaloric effects [2][3][4][5][6][7]. La 1−x Ca x MnO 3 (x = 0.2, 0.33) shows a larger magnetic entropy change than that of gadolinium [3] but has a Curie temperature (T C ) of 251 K, compared to 294 K of Gd [8], which is considered a promising material for magnetic refrigeration at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Second-Order Magnetic Transition in La0.67Ca0.33−xSr x MnO3 (x = 0.05, 0.06, 0.07, 0.08)

Hernández-González

Watts

Palomares-Sánchez

et al. 2016

J Supercond Nov Magn

View full text Add to dashboard Cite

The magnetocaloric properties and the magnetic phase transition of the rare earth manganites La 0.67 Ca 0.33−x Sr x MnO 3 (x = 0.05, 0.06, 0.07, 0.08) have been studied. Three methods were used to determine the order of the magnetic transition: isothermal magnetization curves; magnetization as a function of the temperature; and the phenomenological, universal curve. And it was found to be a second-order transition.

show abstract

“…There have been many investigations on perovskite manganites, R 1x A x MnO 3 (where R is a trivalent rare-earth ion and A is a divalent ion such as Ca, Sr, Ba, or Pb), due to their colossal magnetoresistance and large magnetic entropy change [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric effect in La1-x Ce x MnO3

Hamad

2015

J Adv Ceram

View full text Add to dashboard Cite

Abstract:The magnetocaloric effect is calculated for La 1x Ce x MnO 3 system near a phase transition from ferromagnetic to paramagnetic state as a function of temperature. It is suggested by the results that La 1x Ce x MnO 3 material can be utilized as the working material in an active magnetic regenerative refrigerator with large temperature span, for its significant entropy change upon the application of a magnetic field and the easily tuned Curie temperature.

show abstract

Improvement of refrigerant capacity of La0.7Ca0.3MnO3 material with a few percent Co doping

Cited by 27 publications

References 27 publications

Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film

Correlation between structural parameters and the magnetocaloric effect in epitaxial La0.8Ca0.2MnO3/LaAlO3 thin film

Second-Order Magnetic Transition in La0.67Ca0.33−xSr x MnO3 (x = 0.05, 0.06, 0.07, 0.08)

Magnetocaloric effect in La1-x Ce x MnO3

Contact Info

Product

Resources

About