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Evolution of highly anisotropic magnetism in the titanium-based kagome metals LnTiBi (Ln: La...Gd, Eu, Yb)
Brenden R. Ortiz, Hu Miao, David S. Parker +9
Here we present the family of titanium-based kagome metals of the form LnTiBi (Ln: La...Gd, Eu, Yb). Single crystal growth methods are presented alongs…
Double-layer Kagome Metals Pt3Tl2 and Pt3In2
Michael A. McGuire, Eleanor M. Clements, Qiang Zhang +1
The connectivity and inherent frustration of the kagome lattice can produce interesting electronic structures and behaviors in compounds containing this structural motif. Here we r…
Stacking disorder and thermal transport properties of -RuCl
Heda Zhang, Michael A McGuire, Andrew F May +9
-RuCl, a well-known candidate material for Kitaev quantum spin liquid, is prone to stacking disorder due to the weak van der Waals bonding between the honeycomb layers. Afte…
Phonons and phase symmetries in bulk from scattering measurements and theory
Xun Li, Seunghwan Do, Jiaqiang Yan +7
Phonon-derived behaviors are important indicators of novel phenomena in transition metal trihalides, including spin liquid behavior, two-dimensional magnetism, and spin-lattice cou…
Above-room-temperature ferromagnetism in ultrathin van der Waals magnet
Hang Chen, Shahidul Asif, Kapildeb Dolui +16
Two-dimensional (2D) magnetic van der Waals materials provide a powerful platform for studying fundamental physics of low-dimensional magnetism, engineering novel magnetic phases,…
Real-space visualization of short-range antiferromagnetic correlations in a magnetically enhanced thermoelectric
Raju Baral, Jacob Christensen, Parker Hamilton +10
Short-range magnetic correlations can significantly increase the thermopower of magnetic semiconductors, representing a noteworthy development in the decades-long effort to develop…
Tuning the Room Temperature Ferromagnetism in Fe5GeTe2 by Arsenic Substitution
Andrew F. May, Jiaqiang Yan, Raphael Hermann +2
In order to tune the magnetic properties of the cleavable high-Curie temperature ferromagnet FeGeTe, the effect of increasing the electron count through arsenic substit…
Light Induced Electron Spin Resonance Properties of van der Waals CrX3 (X = Cl, I) Crystals
S. R. Singamaneni, L. M. Martinez, J. Niklas +5
The research on layered van der Waals (vdW) magnets is rapidly progressing owing to exciting fundamental science and potential applications. In bulk crystal form, CrCl3 is a vdW an…
Site Mixing for Engineering Magnetic Topological Insulators
Yaohua Liu, Lin-Lin Wang, Qiang Zheng +9
The van der Waals compound, MnBiTe, is the first intrinsic magnetic topological insulator, providing a materials platform for exploring exotic quantum phenomena such as the…
Tuning Magnetic Order in the van der Waals Metal Fe5GeTe2 by Cobalt Substitution
Andrew F. May, Mao-Hua Du, Valentino R. Cooper +1
Fe5-xGeTe2 is a van der Waals material with one of the highest reported bulk Curie temperatures, ~ 310K. In this study, theoretical calculations and experiments are utilized…
Physical properties and thermal stability of Fe5GeTe2 single crystals
Andrew F. May, Craig A. Bridges, Michael A. McGuire
The magnetic and transport properties of Fe-deficient Fe5GeTe2 single crystals (Fe5-xGeTe2 with x~0.3) were studied and the impact of thermal processing was explored. Quenching cry…
A-type Antiferromagnetic order in MnBi4Te7 and MnBi6Te10 single crystals
J. -Q. Yan, Y. H. Liu, D. Parker +5
MnBiTe and MnBiTe are two members with n=2 and 3 in the family of MnBiTe where the n=1 member, MnBiTe, has been intensively investiga…
Quasi 2-D magnetism in the Kagome layer compound FeSn
Brian C. Sales, Jiaqiang Yan, William R. Meier +3
Single crystals of the single Kagome layer compound FeSn are investigated using x-ray and neutron scattering, magnetic susceptibility and magnetization, heat capacity, resistivity,…
Long range antiferromagnetic order in a rocksalt high entropy oxide
Junjie Zhang, Jiaqiang Yan, S. Calder +10
We report for the first time the magnetic structure of the high entropy oxide using neutron powder diffraction. This material exhibits…
Giant negative electrostriction and dielectric tunability in a van der Waals layered ferroelectric
Sabine M. Neumayer, Eugene A. Eliseev, Michael A. Susner +11
The interest in ferroelectric van der Waals crystals arises from the potential to realize ultrathin ferroic systems owing to the reduced surface energy of these materials and the l…
High-temperature magnetostructural transition in van der Waals-layered a-MoCl3
Michael A. McGuire, Jiaqiang Yan, Paula Lampen-Kelley +9
The crystallographic and magnetic properties of the cleavable 4d3 transition metal compound a-MoCl3 are reported, with a focus on the behavior above room temperature. Crystals were…
Crystal and Magnetic Structures in Layered, Transition Metal Dihalides and Trihalides
Michael A. McGuire
Materials composed of two dimensional layers bonded to one another through weak van der Waals interactions often exhibit strongly anisotropic behaviors and can be cleaved into very…
Magnetic and structural properties of ferromagnetic Fe5PB2 and Fe5SiB2 and effects of Co and Mn substitutions
Michael A. McGuire, David S. Parker
Crystallographic and magnetic properties of Fe5PB2, Fe4CoPB2, Fe4MnPB2, Fe5SiB2, Fe4CoSiB2, and Fe4MnSiB2 are reported. All adopt the tetragonal Cr5B3 structure-type and are ferrom…
Symmetry-lowering lattice distortion at the spin-reorientation in MnBi single crystals
Michael A. McGuire, Huibo Cao, Bryan C. Chakoumakos +1
Structural and physical properties determined by measurements on large single crystals of the anisotropic ferromagnet MnBi are reported. The findings support the importance of magn…
Thermoelectric Properties of Polycrystalline NiSi3P4
Andrew F. May, Michael A. McGuire, Hsin Wang
The Hall and Seebeck coefficients, electrical resistivity and thermal conductivity of polycrystalline NiSi3P4 were characterized from 2 to 775K. Undoped NiSi3P4 behaves like a narr…
Physical properties of Ce3-xTe4 below room temperature
Andrew F. May, Michael A. McGuire, Claudia Cantoni +1
The physical properties of polycrystalline Ce3-xTe4 were investigated by measurements of the thermoelectric properties, Hall coefficient, heat capacity, and magnetization. The full…
Properties of single crystalline AZn2Sb2 (A=Ca,Eu,Yb)
Andrew F. May, Michael A. McGuire, Jie Ma +3
Single crystals of CaZn2Sb2, EuZn2Sb2, and YbZn2Sb2 were grown from melts of nominal composition AZn5Sb5 (A=Ca,Eu,Yb) with the excess melt being removed at 1073\,K. The electrical…
Giant Anharmonic Phonon Scattering in PbTe
O. Delaire, J. Ma, K. Marty +8
Understanding the microscopic processes affecting the bulk thermal conductivity is crucial to develop more efficient thermoelectric materials. PbTe is currently one of the leading…
Kinetically Inhibited Order in a Diamond-Lattice Antiferromagnet
G. J. MacDougall, D. Gout, J. L. Zarestky +5
Frustrated magnetic systems exhibit highly degenerate ground states and strong fluctuations, often leading to new physics. An intriguing example of current interest is the antiferr…