Phase segregation in the hole-doped manganite Nd0.93MnO 2.96: Magnetic measurements and neutron diffraction

N. Ihzaz; H. Vincent; G. Dezanneau; H. Roussel; J. Dhahri; M. Oumezzine

doi:10.1016/j.jmmm.2004.04.108

Phase segregation in the hole-doped manganite Nd_0.93MnO _2.96: Magnetic measurements and neutron diffraction

N. Ihzaz, H. Vincent, G. Dezanneau, H. Roussel, J. Dhahri, M. Oumezzine

Research output: Contribution to journal › Article › peer-review

Abstract

Lacunar-controlled Nd_0.93MnO_2.96 orthorhombic perovskite prepared at 1200°C has been studied at low temperature. Magnetization measurements suggest the coexistence below 80K of ferro- and antiferromagnetic interactions between Mn atoms as in the stoichiometric parent compound NdMnO₃. Nevertheless, spontaneous magnetization curves obtained after sample cooling under a magnetic field of 500Oe (FC) and without magnetic field (ZFC) reveal a much original behavior. Magnetization changes sign twice on ZFC curve; strong negative magnetization is observed below 19K on FC curve. On the basis of neutron diffraction data, this behavior is interpreted by considering the coexistence of two perovskite phases having chemical compositions and magnetic ordering temperatures slightly different; ferromagnetic components in the clusters of both phases are antiferromagnetically coupled in the range 20-80K. Ferromagnetic ordering at 19K of Nd atoms is accompanied by a rearrangement of the Mn ferromagnetic components which become parallel in all the clusters.

Original language	English
Pages (from-to)	221-226
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	281
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jmmm.2004.04.108
Publication status	Published - 1 Oct 2004
Externally published	Yes

Keywords

Magnetic properties
Neutron diffraction
Phase segregation
Rare-earth manganites

Access to Document

10.1016/j.jmmm.2004.04.108

Cite this

@article{53090b39a7dc4d638ff276de247582d4,

title = "Phase segregation in the hole-doped manganite Nd0.93MnO 2.96: Magnetic measurements and neutron diffraction",

abstract = "Lacunar-controlled Nd0.93MnO2.96 orthorhombic perovskite prepared at 1200°C has been studied at low temperature. Magnetization measurements suggest the coexistence below 80K of ferro- and antiferromagnetic interactions between Mn atoms as in the stoichiometric parent compound NdMnO3. Nevertheless, spontaneous magnetization curves obtained after sample cooling under a magnetic field of 500Oe (FC) and without magnetic field (ZFC) reveal a much original behavior. Magnetization changes sign twice on ZFC curve; strong negative magnetization is observed below 19K on FC curve. On the basis of neutron diffraction data, this behavior is interpreted by considering the coexistence of two perovskite phases having chemical compositions and magnetic ordering temperatures slightly different; ferromagnetic components in the clusters of both phases are antiferromagnetically coupled in the range 20-80K. Ferromagnetic ordering at 19K of Nd atoms is accompanied by a rearrangement of the Mn ferromagnetic components which become parallel in all the clusters.",

keywords = "Magnetic properties, Neutron diffraction, Phase segregation, Rare-earth manganites",

author = "N. Ihzaz and H. Vincent and G. Dezanneau and H. Roussel and J. Dhahri and M. Oumezzine",

year = "2004",

month = oct,

day = "1",

doi = "10.1016/j.jmmm.2004.04.108",

language = "English",

volume = "281",

pages = "221--226",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

number = "2-3",

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TY - JOUR

T1 - Phase segregation in the hole-doped manganite Nd0.93MnO 2.96

T2 - Magnetic measurements and neutron diffraction

AU - Ihzaz, N.

AU - Vincent, H.

AU - Dezanneau, G.

AU - Roussel, H.

AU - Dhahri, J.

AU - Oumezzine, M.

PY - 2004/10/1

Y1 - 2004/10/1

N2 - Lacunar-controlled Nd0.93MnO2.96 orthorhombic perovskite prepared at 1200°C has been studied at low temperature. Magnetization measurements suggest the coexistence below 80K of ferro- and antiferromagnetic interactions between Mn atoms as in the stoichiometric parent compound NdMnO3. Nevertheless, spontaneous magnetization curves obtained after sample cooling under a magnetic field of 500Oe (FC) and without magnetic field (ZFC) reveal a much original behavior. Magnetization changes sign twice on ZFC curve; strong negative magnetization is observed below 19K on FC curve. On the basis of neutron diffraction data, this behavior is interpreted by considering the coexistence of two perovskite phases having chemical compositions and magnetic ordering temperatures slightly different; ferromagnetic components in the clusters of both phases are antiferromagnetically coupled in the range 20-80K. Ferromagnetic ordering at 19K of Nd atoms is accompanied by a rearrangement of the Mn ferromagnetic components which become parallel in all the clusters.

AB - Lacunar-controlled Nd0.93MnO2.96 orthorhombic perovskite prepared at 1200°C has been studied at low temperature. Magnetization measurements suggest the coexistence below 80K of ferro- and antiferromagnetic interactions between Mn atoms as in the stoichiometric parent compound NdMnO3. Nevertheless, spontaneous magnetization curves obtained after sample cooling under a magnetic field of 500Oe (FC) and without magnetic field (ZFC) reveal a much original behavior. Magnetization changes sign twice on ZFC curve; strong negative magnetization is observed below 19K on FC curve. On the basis of neutron diffraction data, this behavior is interpreted by considering the coexistence of two perovskite phases having chemical compositions and magnetic ordering temperatures slightly different; ferromagnetic components in the clusters of both phases are antiferromagnetically coupled in the range 20-80K. Ferromagnetic ordering at 19K of Nd atoms is accompanied by a rearrangement of the Mn ferromagnetic components which become parallel in all the clusters.

KW - Magnetic properties

KW - Neutron diffraction

KW - Phase segregation

KW - Rare-earth manganites

U2 - 10.1016/j.jmmm.2004.04.108

DO - 10.1016/j.jmmm.2004.04.108

M3 - Article

AN - SCOPUS:4544279658

SN - 0304-8853

VL - 281

SP - 221

EP - 226

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2-3