Structural and paramagnetic properties of dilute Ga1-xMnxN

Abstract

Systematic investigations of the structural and magnetic properties of single crystal (Ga,Mn)N films grown by metal organic vapor phase epitaxy are presented. High resolution transmission electron microscopy, synchrotron x-ray diffraction, and extended x-ray absorption fine structure studies do not reveal any crystallographic phase separation and indicate that Mn occupies Ga-substitutional sites in the Mn concentration range up to 1%. The magnetic properties as a function of temperature, magnetic field and its orientation with respect to the c-axis of the wurtzite structure can be quantitatively described by the paramagnetic theory of an ensemble of non-interacting Mn${}^{3+}$ ions in the relevant crystal field, a conclusion consistent with the x-ray absorption near edge structure analysis. A negligible contribution of Mn in the 2+ charge state points to a low concentration of residual donors in the studied films. Studies on modulation doped p-type (Ga,Mn)N/(Ga,Al)N:Mg heterostructures do not reproduce the high temperature robust ferromagnetism reported recently for this system.

15 pages, 14 figures

References in corpus (11)

• Theory of ferromagnetic (III,Mn)V semiconductors
• Origin and control of high-temperature ferromagnetism in semiconductors
• Achieving High Curie Temperature in (Ga,Mn)As
• Paramagnetic GaN:Fe and ferromagnetic (Ga,Fe)N - relation between structural, electronic, and magnetic properties
• Controlled aggregation of magnetic ions in a semiconductor. Experimental demonstration
• Enhanced annealing, high Curie temperature and low-voltage gating in (Ga,Mn)As: A surface oxide control study
• Hole states in wide band-gap diluted magnetic semiconductors and oxides
• Nanosized superparamagnetic precipitates in cobalt-doped ZnO
• Embedded magnetic phases in (Ga,Fe)N: the key role of growth temperature
• Ferromagnetic (Ga,Mn)N epilayers versus antiferromagnetic GaMn${}_3$N clusters
• X-ray magnetic circular dichroism characterization of GaN/Ga1-xMnxN digital ferromagnetic heterostructure

Cited by in corpus (36)

• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• Sensitive SQUID magnetometry for studying nano-magnetism
• Spinodal nanodecomposition in magnetically doped semiconductors
• Hard x-ray emission spectroscopy: a powerful tool for the characterization of magnetic semiconductors
• Experimental probing of exchange interactions between localized spins in the dilute magnetic insulator (Ga,Mn)N
• Aggregation and magnetism of Cr, Mn, and Fe cations in GaN
• Origin of bulk uniaxial anisotropy in zinc-blende dilute magnetic semiconductors
• Phase diagram and critical behavior of the random ferromagnet $G{a}_{1-x}M{n}_{x}N$
• Origin of low-temperature magnetic ordering in Ga1-xMnxN
• GaMnN epitaxial films with high magnetization
• Manipulating Mn--Mg${}_k$ cation complexes to control the charge- and spin-state of Mn in GaN
• Stretching magnetism with an electric field in a nitride semiconductor
• Impact of substrate temperature on magnetic properties of plasma-assisted molecular beam epitaxy grown (Ga,Mn)N
• Electronic structure and Jahn-Teller effect in GaN:Mn and ZnS:Cr
• In situ compensation method for high-precision and high-sensitivity integral magnetometry
• Effects of s,p - d and s - p exchange interactions probed by exciton magnetospectroscopy in (Ga,Mn)N
• Diffusion of Mn in gallium nitride: Experiment and modelling
• The Fe-Mg interplay and the effect of deposition mode in (Ga,Fe)N doped with Mg
• Improved-Sensitivity Integral SQUID Magnetometry of (Ga,Mn)N Thin Films in Proximity to Mg-doped GaN
• What is the valence of Mn in Ga${}_{1-x}$Mn${}_x$N?
• Theory of ferromagnetism driven by superexchange in dilute magnetic semiconductors
• A Simplified Method of the Assessment of Magnetic Anisotropy of Commonly Used Sapphire Substrates in SQUID Magnetometers
• All-nitride and In-free Al${}_x$Ga${}_{1-x}$N:Mn/GaN distributed Bragg reflectors for the near-infrared
• Functional Mn--Mg${}_k$ cation complexes in GaN featured by Raman spectroscopy
• Electrical characteristics of vertical-geometry Schottky junction to magnetic insulator (Ga,Mn)N heteroepitaxially grown on sapphire
• Crystal field model simulations of magnetic response of pairs, triplets and quartets of Mn${}^{3+}$ ions in GaN
• Electronic structure and local distortions in epitaxial ScGaN films
• Spin orbital reorientation transitions induced by magnetic field
• In Situ Compensation Method for Precise Integral SQUID Magnetometry of Miniscule Biological, Chemical, and Powder Specimens Requiring the Use of Capsules
• Incorporation of Mn in Al${}_x$Ga${}_{1-x}$N probed by x-ray absorption and emission spectroscopy, high-resolution microscopy, x-ray diffraction and first-principles calculations
• Spin Hall magnetoresistance in Pt/(Ga,Mn)N devices
• Electric field manipulation of magnetization in an insulating dilute ferromagnet through piezoelectromagnetic coupling
• Ferromagnetic Resonance in a Magnetically Dilute Percolating Ferromagnet: An Experimental and Theoretical Study
• Reliable Magnetometry for Antiferromagnets and Thin Films: Correcting Substrate Artifacts in Mn3Sn/MgO Systems
• From narrow-gap and semimagnetic semiconductors to spintronics and topological matter: a life with spins
• Pair anisotropy in disordered magnetic systems