A detailed study of the hysteresis in La0.67Ca0.33MnO3

Henrique Neves Bez; Kaspar Kirstein Nielsen; Anders Smith; Christian R. H. Bahl

doi:10.1016/j.jmmm.2016.05.011

A detailed study of the hysteresis in La_0.67Ca_0.33MnO₃

Henrique Neves Bez
, Kaspar Kirstein Nielsen
, Anders Smith
, Christian R. H. Bahl

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

483 Downloads (Orbit)

Abstract

We report a thorough study of the thermal hysteretic behaviour of a single phase sample of the magnetocaloric material La_0.67Ca_0.33MnO₃. Previous reports in the literature have variously found hysteretic and non-hysteretic behaviour. We show the importance of measuring under carefully defined heating and cooling procedures. Careful analysis of the specific heat, measured at five different temperature ramp rates, and the magnetic entropy change indicates that there is no observable hysteresis, even though the behaviour of both quantities is consistent with a first-order phase transition. We discuss the reasons for this and for the differing results previously found.

Original language	English
Journal	Journal of Magnetism and Magnetic Materials
Volume	416
Pages (from-to)	429-433
ISSN	0304-8853
DOIs	https://doi.org/10.1016/j.jmmm.2016.05.011
Publication status	Published - 2016

Keywords

Magnetocaloric effect
Hysteresis
Phase transition
Manganites

Access to Document

10.1016/j.jmmm.2016.05.011

HNB JMMM Hysteresis submittedAccepted author manuscript, 597 KBLicence: CC BY-NC-ND

OpenUrl availability

Check availability in DTU Findit

Cite this

@article{09e0cddc53ed41f8ab5b36d74ea1378f,

title = "A detailed study of the hysteresis in La0.67Ca0.33MnO3",

abstract = "We report a thorough study of the thermal hysteretic behaviour of a single phase sample of the magnetocaloric material La0.67Ca0.33MnO3. Previous reports in the literature have variously found hysteretic and non-hysteretic behaviour. We show the importance of measuring under carefully defined heating and cooling procedures. Careful analysis of the specific heat, measured at five different temperature ramp rates, and the magnetic entropy change indicates that there is no observable hysteresis, even though the behaviour of both quantities is consistent with a first-order phase transition. We discuss the reasons for this and for the differing results previously found.",

keywords = "Magnetocaloric effect, Hysteresis, Phase transition, Manganites",

author = "\{Neves Bez\}, Henrique and Nielsen, \{Kaspar Kirstein\} and Anders Smith and Bahl, \{Christian R. H.\}",

year = "2016",

doi = "10.1016/j.jmmm.2016.05.011",

language = "English",

volume = "416",

pages = "429--433",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

}

TY - JOUR

T1 - A detailed study of the hysteresis in La0.67Ca0.33MnO3

AU - Neves Bez, Henrique

AU - Nielsen, Kaspar Kirstein

AU - Smith, Anders

AU - Bahl, Christian R. H.

PY - 2016

Y1 - 2016

N2 - We report a thorough study of the thermal hysteretic behaviour of a single phase sample of the magnetocaloric material La0.67Ca0.33MnO3. Previous reports in the literature have variously found hysteretic and non-hysteretic behaviour. We show the importance of measuring under carefully defined heating and cooling procedures. Careful analysis of the specific heat, measured at five different temperature ramp rates, and the magnetic entropy change indicates that there is no observable hysteresis, even though the behaviour of both quantities is consistent with a first-order phase transition. We discuss the reasons for this and for the differing results previously found.

AB - We report a thorough study of the thermal hysteretic behaviour of a single phase sample of the magnetocaloric material La0.67Ca0.33MnO3. Previous reports in the literature have variously found hysteretic and non-hysteretic behaviour. We show the importance of measuring under carefully defined heating and cooling procedures. Careful analysis of the specific heat, measured at five different temperature ramp rates, and the magnetic entropy change indicates that there is no observable hysteresis, even though the behaviour of both quantities is consistent with a first-order phase transition. We discuss the reasons for this and for the differing results previously found.

KW - Magnetocaloric effect

KW - Hysteresis

KW - Phase transition

KW - Manganites

U2 - 10.1016/j.jmmm.2016.05.011

DO - 10.1016/j.jmmm.2016.05.011

M3 - Journal article

SN - 0304-8853

VL - 416

SP - 429

EP - 433

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -