From single- to double-first-order magnetic phase transition in magnetocaloric Mn1−xCrxCoGe compounds

Substitution of some Cr for Mn atoms in MnCoGe was employed to control the magnetic and structural transitions in this alloy to coincide, leading to a single first-order magnetostructural transition from the ferromagnetic to the paramagnetic state with a giant magnetocaloric effect observed near room temperature. Further increase in the Cr...

High-resistivity nanogranular Co–Al–O films for high-frequency applications

This work presents a series of high-resistivity nanogranular Co–Al–O films with maximum resistivity of ? 110?m??cm. The films were deposited using pulsed dc reactive sputtering of a Co72Al28 target in an oxygen/argon ambient. The samples were characterized by scanning electron microscopy (SEM), M-H loop measurements, and s-parameter measurements...

Enhanced tunneling across nanometer-scale metal–semiconductor interfaces

We have measured electrical transport across epitaxial, nanometer-sized metal–semiconductor interfaces by contacting CoSi2 islands grown on Si(111) with the tip of a scanning tunneling microscope. The conductance per unit area was found to increase with decreasing diode area. Indeed, the zero-bias conductance was found to be ? 104 times larger...

Magnetic order in the two-dimensional randomly mixed ferromagnet-antiferromagnet Rb2Cu1-xCoxF4

Static and dynamic properties of the two-dimensional Ising spin glass Rb2Cu1-xCo xF4

Static critical behavior of the two-dimensional Ising spin glass Rb2Cu1-xCo xF4

Activated dynamics in the two-dimensional Ising spin-glass Rb2Cu1-xCo xF4

Rb2Cu1-xCoxF4, a two-dimensional Ising spin glass

NMR study of local magnetizations in diluted two-dimensional antiferromagnets