Morgan W. Masters

Discovery of ferromagnetism with large magnetic anisotropy in ZrMnP and HfMnP

ZrMnP and HfMnP single crystals are grown by a self-flux growth technique, and structural as well as temperature dependent magnetic and transport properties are studied. Both compounds have an orthorhombic crystal structure. ZrMnP and HfMnP are ferromagnetic with Curie temperatures around 370 K and 320 K, respectively. The spontaneous magnetizations of ZrMnP and HfMnP are determined to be 1.9 μB/f.u. and 2.1 μB/f.u., respectively, at 50 K. The magnetocaloric effect of ZrMnP in terms of entropy change (ΔS) is estimated to be −6.7 kJ m−3 K−1 around 369 K. The easy axis of magnetization is [100] for both compounds, with a small anisotropy relative to the [010] axis. At 50 K, the anisotropy field along the [001] axis is ∼4.6 T for ZrMnP and ∼10 T for HfMnP. Such large magnetic anisotropy is remarkable considering the absence of rare-earth elements in these compounds. The first principle calculation correctly predicts the magnetization and hard axis orientation for both compounds, and predicts the experimental...

Physical properties of V 1−xTixO2 (0 < x < 0.187) single crystals

Free standing, low strain, single crystals of pure and titanium doped VO2 were grown out of an excess of V 2O5 using high temperature solution growth techniques. At TMI ∼ 340 K, pure VO2 exhibits a clear first-order phase transition from a high-temperature paramagnetic tetragonal phase (R) to a low-temperature non-magnetic monoclinic phase (M1). With Ti doping, another monoclinic phase (M2) emerges between the R and M1 phases. The phase transition temperature between R and M2 increases with increasing Ti doping while the transition temperature between M2 and M1 decreases.

Pressure induced change in the electronic state of Ta4Pd3Te16

We present measurements of superconducting transition temperature, resistivity, magnetoresistivity and temperature dependence of the upper critical field of Ta

Effect of nickel substitution on magnetism in the layered van der Waals ferromagnet Fe3GeTe2

_4

Reduction of the ordered magnetic moment and its relationship to Kondo coherence in Ce1−xLaxCu2Ge2

Pd

Reduction of the ordered magnetic moment and its relationship to Kondo coherence in

_3

Reduction of the ordered-magnetic moment and its relationship to Kondo coherence in Ce 1- x La x Cu 2 Ge 2

Te

The Effects of Nickel Substitution on Ferromagnetism in Fe

_{16}

_3

under pressures up to 16.4 kbar. All measured properties have an anomaly at

GeTe

\sim 2 - 4