Two-dimensional and van der Waals ferromagnets are ideal platform to study low-dimensional magnetism and proximity effects in van der Waals heterostructures. Their ultimate two-dimensional character also offers the opportunity to easily adjust their magnetic properties using strain or electric fields. Among 2D ferromagnets, the Te2 compounds with x = 0–1 are very promising because their magnetic properties depend on the amount of self-intercalated Cr atoms between pure CrTe2 layers and the Curie temperature ( ) can reach room temperature for certain compositions. Here, we investigate the evolution of the composition as well as the structural and magnetic properties of thin Cr1.33Te2 (Cr2Te3) films epitaxially grown on graphene upon annealing. We observe a transition above 450 °C from the Cr1.33Te2 phase with perpendicular magnetic anisotropy and a of 180 K to a composition close to Te2 with in-plane magnetic anisotropy and a of 240–250 K. This phase remains stable up to 650 °C above which a pure Cr film starts to form. This work demonstrates the complex interplay between intercalated Cr, lattice parameters, and magnetic properties in Te2 compounds.
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13 May 2024
Research Article|
May 14 2024
Magnetic evolution of Cr2Te3 epitaxially grown on graphene with post-growth annealing
Quentin Guillet
;
Quentin Guillet
(Data curation, Formal analysis, Investigation, Methodology, Writing – original draft)
1
Université Grenoble Alpes, CEA, CNRS, IRIG-SPINTEC
, 38000 Grenoble, France
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Hervé Boukari;
Hervé Boukari
(Data curation, Investigation, Methodology, Validation)
2
Université Grenoble Alpes, CNRS, Institut Néel
, 38000 Grenoble, France
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Fadi Choueikani
;
Fadi Choueikani
(Data curation, Formal analysis, Methodology)
3
Synchrotron SOLEIL
, L'Orme des Merisiers, 91190 Saint-Aubin, France
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Philippe Ohresser
;
Philippe Ohresser
(Data curation, Formal analysis, Methodology, Resources)
3
Synchrotron SOLEIL
, L'Orme des Merisiers, 91190 Saint-Aubin, France
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Abdelkarim Ouerghi
;
Abdelkarim Ouerghi
(Data curation, Resources)
4
Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies
, Palaiseau, France
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Florie Mesple
;
Florie Mesple
(Resources)
5
Université Grenoble Alpes, CEA, CNRS, IRIG-PHELIQS
, 38000 Grenoble, France
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Vincent T. Renard
;
Vincent T. Renard
(Resources)
5
Université Grenoble Alpes, CEA, CNRS, IRIG-PHELIQS
, 38000 Grenoble, France
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Jean-François Jacquot;
Jean-François Jacquot
(Investigation, Methodology)
6
Université Grenoble Alpes, CEA, CNRS, IRIG-SYMMES
, 38000 Grenoble, France
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Denis Jalabert
;
Denis Jalabert
(Data curation, Formal analysis, Investigation, Methodology)
7
Université Grenoble Alpes, CEA, IRIG-MEM
, 38000 Grenoble, France
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Céline Vergnaud
;
Céline Vergnaud
(Investigation, Methodology)
1
Université Grenoble Alpes, CEA, CNRS, IRIG-SPINTEC
, 38000 Grenoble, France
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Frédéric Bonell
;
Frédéric Bonell
(Data curation, Formal analysis, Investigation, Methodology)
1
Université Grenoble Alpes, CEA, CNRS, IRIG-SPINTEC
, 38000 Grenoble, France
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Alain Marty
;
Alain Marty
(Data curation, Formal analysis, Investigation, Methodology, Supervision)
1
Université Grenoble Alpes, CEA, CNRS, IRIG-SPINTEC
, 38000 Grenoble, France
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Matthieu Jamet
Matthieu Jamet
a)
(Conceptualization, Formal analysis, Investigation, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing)
1
Université Grenoble Alpes, CEA, CNRS, IRIG-SPINTEC
, 38000 Grenoble, France
a)Author to whom correspondence should be addressed: matthieu.jamet@cea.fr
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a)Author to whom correspondence should be addressed: matthieu.jamet@cea.fr
Appl. Phys. Lett. 124, 202402 (2024)
Article history
Received:
January 24 2024
Accepted:
May 01 2024
Citation
Quentin Guillet, Hervé Boukari, Fadi Choueikani, Philippe Ohresser, Abdelkarim Ouerghi, Florie Mesple, Vincent T. Renard, Jean-François Jacquot, Denis Jalabert, Céline Vergnaud, Frédéric Bonell, Alain Marty, Matthieu Jamet; Magnetic evolution of Cr2Te3 epitaxially grown on graphene with post-growth annealing. Appl. Phys. Lett. 13 May 2024; 124 (20): 202402. https://doi.org/10.1063/5.0200063
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