Evidence for ferromagnetic ordering in the MAX phase (Cr0.96Mn0.04)2GeC

O. Rivin; E. N. Caspi; A. Pesach; H. Shaked; A. Hoser; R. Georgii; Q. Tao; J. Rosen; M. W. Barsoum

doi:10.1080/21663831.2017.1317295

Evidence for ferromagnetic ordering in the MAX phase (Cr_0.96Mn_0.04)₂GeC

O. Rivin, E. N. Caspi, A. Pesach, H. Shaked, A. Hoser, R. Georgii, Q. Tao, J. Rosen, M. W. Barsoum

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

15 Scopus citations

Abstract

Magnetic ordering in the MAX phase (Cr_0.96Mn_0.04)₂GeC is investigated by means of neutron powder diffraction (NPD). Upon cooling, the temperature dependence of the magnetization shows a two-step increase. The NPD refinement reveals that the first step, at 300 K, and the second step, at 38 K, originate from a collinear magnetic structure within the MAX phase and a spinel MnCr₂O₄ impurity phase, respectively. The former magnetic structure is oriented perpendicular to the c axis, with a net magnetic moment of ∼0.6(2) μ_B per Cr/Mn atom at 50 K. This is the first direct evidence for magnetic ordering within a bulk MAX phase.

Original language	English
Pages (from-to)	465-471
Number of pages	7
Journal	Materials Research Letters
Volume	5
Issue number	7
DOIs	https://doi.org/10.1080/21663831.2017.1317295
State	Published - 3 Nov 2017
Externally published	Yes

Keywords

MAX phase
magnetic ordering
neutron powder diffraction
transition metals magnetism

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1080/21663831.2017.1317295

Cite this

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title = "Evidence for ferromagnetic ordering in the MAX phase (Cr0.96Mn0.04)2GeC",

abstract = "Magnetic ordering in the MAX phase (Cr0.96Mn0.04)2GeC is investigated by means of neutron powder diffraction (NPD). Upon cooling, the temperature dependence of the magnetization shows a two-step increase. The NPD refinement reveals that the first step, at 300 K, and the second step, at 38 K, originate from a collinear magnetic structure within the MAX phase and a spinel MnCr2O4 impurity phase, respectively. The former magnetic structure is oriented perpendicular to the c axis, with a net magnetic moment of ∼0.6(2) μB per Cr/Mn atom at 50 K. This is the first direct evidence for magnetic ordering within a bulk MAX phase.",

keywords = "MAX phase, magnetic ordering, neutron powder diffraction, transition metals magnetism",

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doi = "10.1080/21663831.2017.1317295",

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T1 - Evidence for ferromagnetic ordering in the MAX phase (Cr0.96Mn0.04)2GeC

AU - Rivin, O.

AU - Caspi, E. N.

AU - Pesach, A.

AU - Shaked, H.

AU - Hoser, A.

AU - Georgii, R.

AU - Tao, Q.

AU - Rosen, J.

AU - Barsoum, M. W.

PY - 2017/11/3

Y1 - 2017/11/3

N2 - Magnetic ordering in the MAX phase (Cr0.96Mn0.04)2GeC is investigated by means of neutron powder diffraction (NPD). Upon cooling, the temperature dependence of the magnetization shows a two-step increase. The NPD refinement reveals that the first step, at 300 K, and the second step, at 38 K, originate from a collinear magnetic structure within the MAX phase and a spinel MnCr2O4 impurity phase, respectively. The former magnetic structure is oriented perpendicular to the c axis, with a net magnetic moment of ∼0.6(2) μB per Cr/Mn atom at 50 K. This is the first direct evidence for magnetic ordering within a bulk MAX phase.

AB - Magnetic ordering in the MAX phase (Cr0.96Mn0.04)2GeC is investigated by means of neutron powder diffraction (NPD). Upon cooling, the temperature dependence of the magnetization shows a two-step increase. The NPD refinement reveals that the first step, at 300 K, and the second step, at 38 K, originate from a collinear magnetic structure within the MAX phase and a spinel MnCr2O4 impurity phase, respectively. The former magnetic structure is oriented perpendicular to the c axis, with a net magnetic moment of ∼0.6(2) μB per Cr/Mn atom at 50 K. This is the first direct evidence for magnetic ordering within a bulk MAX phase.

KW - MAX phase

KW - magnetic ordering

KW - neutron powder diffraction

KW - transition metals magnetism

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DO - 10.1080/21663831.2017.1317295

M3 - Article

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