Magnetic, thermal, and electronic-transport properties of 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>EuMg</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
 single crystals

Pakhira, Santanu; Tanatar, M. A.; Johnston, D. C.

doi:10.1103/physrevb.101.214407

Cited by 40 publications

(53 citation statements)

References 67 publications

(101 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We also present χ (T ) results in a low magnetic field H = 100 Oe that are consistent with the magnetic structure obtained from neutron-diffraction measurements in zero field. The difference between the present AFM structure and that inferred from the previous χ (T ) measurements in H = 1 kOe which report a 120 • helical structure [8] implies that the magnetic texture (i.e., structure and/or domains) is sensitive to the strength of the applied magnetic field and requires additional neutron-diffraction measurements under magnetic field for confirmation.…”

Section: Introductioncontrasting

confidence: 95%

“…A mean-field analysis of previous single-crystal χ (T ) measurements with H = 1 kOe (as opposed to the zero applied magnetic field for the present neutron-diffraction experiments) indicated a c-axis helical magnetic ground state where each adjacent Eu-moment layer is ferromagnetically aligned in the ab plane and rotated by ≈120 • with respect to its nearest-neighbor (NN) Eu layers [8]. If present, such a magnetic structure would give rise to a magnetic unit cell three times that of the chemical unit cell along the c axis, and would be manifested by extra magnetic Bragg reflections shifted from the nuclear Bragg positions by ±1/3.…”

Section: Neutron Diffractionmentioning

confidence: 58%

“…EuMg 2 Bi 2 single crystals with hexagonal lattice parameters a = 4.7724 (3) and c = 7.8483(5) Å [8] were grown by a self-flux method with starting composition EuMg 4 Bi 6 as described previously [9]. The χ (T ) measurements were carried out using a magnetic-properties measurement system (Quantum Design, Inc.) in the temperature range 1.8-300 K. A ≈50-mg crystal was cut into two pieces having masses ≈10 and ≈40 mg.…”

Section: Experimental Details and Methodsmentioning

confidence: 99%

“…164), where the Eu atoms form a triangular lattice in the ab plane with simple hexagonal stacking along the c axis. Recently, our anisotropic magnetic susceptibility χ (T ) data measured in a magnetic field H = 1 kOe demonstrated that both the in-plane and out-of-plane magnetic susceptibilities are almost temperature independent below T N [8]. Using our recent formulation of molecular-field theory [12,13], it has been proposed that the magnetic structure below T N is a c-axis helix with a turn angle of ≈120 • between adjacent Eu layers in which the Eu spins are ferromagnetically aligned in the ab plane in each Eu layer [8].…”

Section: Introductionmentioning

confidence: 91%

“…Recent studies of rare-earth-based metallic systems have revealed novel electronic states arising from a complex interplay of magnetism and electron-band topology [1][2][3][4][5][6][7]. EuMg 2 Bi 2 is one such system that undergoes antiferromagnetic (AFM) ordering below a Néel temperature T N ≈ 6.7 K [8][9][10] and is also reported to host multiple Dirac points located at different energies with respect to the Fermi energy [10]. Various topological states of EuMg 2 Bi 2 (such as axion or Weyl states) are dependent on the nature of the magnetic order since time-reversal symmetry breaking and magnetic crystalline symmetry may gap or split the Dirac points.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Zero-field magnetic ground state of EuMg2Bi2

et al. 2021

Self Cite

View full text Add to dashboard Cite

Layered trigonal EuMg 2 Bi 2 is reported to be a topological semimetal that hosts multiple Dirac points that may be gapped or split by the onset of magnetic order. Here, we report zero-field single-crystal neutron-diffraction and bulk magnetic susceptibility measurements versus temperature χ (T) of EuMg 2 Bi 2 that show the intraplane ordering is ferromagnetic (Eu 2+ , S = 7/2) with the moments aligned in the ab plane while adjacent layers are aligned antiferromagnetically (i.e., A-type antiferromagnetism) below the Néel temperature.

show abstract

Section: Introductioncontrasting

confidence: 95%

Section: Neutron Diffractionmentioning

confidence: 58%

Section: Experimental Details and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Zero-field magnetic ground state of EuMg2Bi2

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

Tetragonal Kondo Insulator EuCd₂Sb₂ Discovered via High Pressure High Temperature Synthesis

Jiménez

Melnick

Koirala

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Magnetic and electronic properties of quantum materials heavily rely on the crystal structure even in the same chemical compositions. In this study, it is demonstrated that a layered tetragonal EuCd2Sb2 structure can be obtained by treating bulk trigonal EuCd2Sb2 under high pressure (6 GPa) and high temperature (600 °C). Magnetization measurements of the newly formed layered tetragonal EuCd2Sb2 confirm an antiferromagnetic ordering with Neel temperature (TN) around 16 K, which is significantly higher than that (TN ≈ 7 K) of trigonal EuCd2Sb2, consistent with heat capacity measurements. Moreover, bad metal behavior is observed in the temperature dependence of the electrical resistivity and the resistivity shows a dramatic increase around the Neel temperature. Electronic structure calculations with local density approximation dynamic mean–field theory (LDA+DMFT) show that this material is strongly correlated with well‐formed large magnetic moments, due to Hund's coupling, which is known to dramatically suppress the Kondo scale.

show abstract

Optoelectronic, thermodynamic and vibrational properties of intermetallic MgAl2Ge2: a first-principles study

et al. 2021

View full text Add to dashboard Cite

Intermetallic compounds with CaAl2Si2-type structure have been studied extensively due to their exciting set of physical properties. Among various alumo-germanides, MgAl2Ge2 is the new representative of CaAl2Si2-type structures. Our previous study explores the structural aspects, mechanical behaviors and electronic features of intermetallic MgAl2Ge2. The present work discloses the results of optoelectronic, thermodynamic and vibrational properties of MgAl2Ge2 via density functional theory-based investigations. The band structure calculations suggest that MgAl2Ge2 possesses slight electronic anisotropy and the compound is metallic. The Fermi surface topology reveals that both electron- and hole-like sheets are present in MgAl2Ge2. The electron charge density map indicates toward the dominance of covalent bonding in MgAl2Ge2. The optical parameters are found to be independent of the state of the polarization of incident electric field. The large value of the reflectivity in the visible-to-ultraviolet region up to ~ 15 eV suggests that MgAl2Ge2 might be a good candidate as coating material to avoid solar heating. The thermodynamic properties have been calculated using the quasi-harmonic Debye approximation. We have found indications of lattice instability at the Brillouin zone boundary in the trigonal $$P\overline{3}m1$$ P 3 ¯ m 1 phase from the phonon dispersion curves. However, the compound might be stable at elevated temperature and as a function of pressure. All the theoretical findings herein have been compared with the reported results (where available). Various implications of our results have been discussed in detail. Graphic abstract

show abstract

Magnetic, thermal, and electronic-transport properties of EuMg2Bi2 single crystals

Cited by 40 publications

References 67 publications

Zero-field magnetic ground state of EuMg2Bi2

Zero-field magnetic ground state of EuMg2Bi2

Tetragonal Kondo Insulator EuCd₂Sb₂ Discovered via High Pressure High Temperature Synthesis

Optoelectronic, thermodynamic and vibrational properties of intermetallic MgAl2Ge2: a first-principles study

Contact Info

Product

Resources

About

Magnetic, thermal, and electronic-transport properties of EuMg2Bi2 single crystals

Cited by 40 publications

References 67 publications

Zero-field magnetic ground state of EuMg2Bi2

Zero-field magnetic ground state of EuMg2Bi2

Tetragonal Kondo Insulator EuCd2Sb2 Discovered via High Pressure High Temperature Synthesis

Optoelectronic, thermodynamic and vibrational properties of intermetallic MgAl2Ge2: a first-principles study

Contact Info

Product

Resources

About

Tetragonal Kondo Insulator EuCd₂Sb₂ Discovered via High Pressure High Temperature Synthesis