Method and apparatus for manufacturing isotropic magnetic nanocolloids by pulsed laser ablation
AssigneeMetastable Materials, Inc.
InventorsKevin Hagedorn, Henrietta Malizia
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Abstract
Disclosed herein are systems, methods, and apparatuses for manufacturing highly isotropic magnetic nanoparticles. In particular, manufacturing of spherical and amorphous particles suspended in a solvent by irradiating alloy targets submerged in a solvent using nanosecond-scale laser pulses is disclosed. The absence of shape and crystalline anisotropy in the particles yields a colloidal suspension with excellent soft magnetic properties which can be used to improve the performance of various medical diagnostic devices and consumer electronics.
Claims11
Magnetic particles comprising:
- isotropic particles having the general formula
- X1-aYa, where
- X is one of Co, Fe or a combination of Co and Fe,
- Y is at least one of Zr, Ti, Sc, Ta, Hf, Y, La, Si, B, Nd, either individually or in combination,
- a has a value between 0.4 and 0.02, and
- the isotropic particles have an average particle size between 15 and 45 nm, an aspect ratio of less than 5:1, and an amorphous atomic structure.
A particulate material comprising:
- nanocomposite magnetic particles having the general formula
- X1-a-bYaZb, where
- X is Co, Fe, Ni, or a combination of one or more of Co, Fe, or Ni,
- Y is one of Zr, Ti, Sc, Ta, Hf, Y, La, Nd, Si, B, or a combination of one or more of Zr, Ti, Sc, Ta, Hf, Y, La, Nd, Si, or B,
- Z is one of Au, Ag, Cu, or a combination of one or more of Au, Ag or Cu,
- a has a value between 0.4 and 0.02,
- b has a value between 0.05 and 0.001,
- the nanocomposite magnetic particles have an average particle size between 15 and 45 nm and an aspect ratio of less than 5:1, and
- the atomic structure of the composition is one of an amorphous structure, a structure of crystallites between 1 and 5 nm, or a combination of the amorphous structure and the structure of crystallites between 1 and 5 nm.
Dependencies are inferred from the claim text.