Selective dilution and magnetic properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">La</mml:mi><mml:mn>0.7</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Sr</mml:mi><mml:mn>0.3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Mn</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msubsup><mml:mi>M</mml:mi><mml:mi>x</mml:mi><mml:mo>′</mml:mo></mml:msubsup><mm

Nam, D. N. H.; Bau, L.V.; Khiem, Nguyen Van; Dai, N. V.; Hong, Le Van; Phuc, N.X.; Newrock, R. S.; Nordblad, Per

doi:10.1103/physrevb.73.184430

Cited by 45 publications

(17 citation statements)

References 20 publications

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“…3 Result and discussion The decrease of T c has been explained as a result of the dilution effect that causes a decrease of the molecular field acting on Mn ions according to the molecular field theory [4]. Since all the samples show sharp FM-PM phase transitions, one would expect a high entropy change at T c according to equation (1).…”

Section: Methodsmentioning

confidence: 99%

“…The samples used in this study were pieces taken from the same batches used in a previous work [4]. Room-temperature x-ray diffraction measurements show that the samples are essentially single phase of perovskite rhombohedral (space group R-3c) structures.…”

Section: Methodsmentioning

confidence: 99%

“…In a recent study, Nam et al [4] have shown that the substitution of Al and Ti for Mn in La 0.7 Sr 0.3 MnO 3 effectively lowers the ferromagnetic ordering temperature T c from ~365K to well below 300 K. These compounds are therefore suitable for studies of MCE in the room-temperature region.…”

Section: T H S T H H Tmentioning

confidence: 96%

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Room‐temperature magnetic entropy change in La_0.7Sr_0.3Mn_1‐xM_xO₃ (M = Al, Ti)

Dai

Son²,

Yu³

et al. 2007

Physica Status Solidi (b)

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PACS 75.30. Sg, 75.47.Lx Magnetic entropy change in and above the room-temperature region has been measured for La 0.7 Sr 0.3 Mn 1-x M x O 3 (M = Al, Ti) by means of magnetization measurements in magnetic fields up to 6 T. The magnetocaloric effect (MCE) becomes strongest at the Curie temperature T c that is tuned to ~300 K by the substitution of Al or Ti for Mn. While the substitution of Al for Mn drastically reduces the entropy change, it extends considerably the working temperature span and improves the relative cooling power (RCP). The MCE and RCP seem to be only lightly affected by Ti substitution. Although manganites are considered potential for magnetic refrigerants, the limitations for achieving strong MCE in the materials are also discussed.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Room‐temperature magnetic entropy change in La_0.7Sr_0.3Mn_1‐xM_xO₃ (M = Al, Ti)

Dai

Son²,

Yu³

et al. 2007

Physica Status Solidi (b)

Self Cite

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“…Room-temperature X-ray diffraction patterns show that all of the samples are essentially single phase with perovskite rhombohedral (space group R3c) structures, in agreement with our earlier studies [18,19,29]. Magnetic measurements were performed in a Physical Property Measurement Systems (PPMS).…”

Section: Methodsmentioning

confidence: 51%

“…1a), T C $364, 334 and 304 K for x ¼ 0.0, x Al ¼ 0.05 and x Ti ¼ 0.05, respectively (also see Ref. [18]), sets of magnetization isotherms were measured in the transition region with a temperature separation of DT ¼ 1 K.…”

Section: Analysis Of the Datamentioning

confidence: 99%