Method and apparatus for nanomagnetic manipulation and sensing

A nanoelectromagnetic mechanical apparatus comprising:

• a plurality of nanoprobes combined to form a nanoelectromagnet assembly;
• and
• at least one magnetic nanowire disposed proximate to the nanoelectromagnet assembly and electromagnetically coupled thereto.

An apparatus for providing a nanogap point contact comprising:

• a first magnetic nanowire having at least one associated electrical contact;
• and
• a second magnetic nanowire disposed askew to the first magnetic nanowire to form a crossing therebetween and having at least one associated electrical contact, the first and second nanowires touching or nearly touching each other at the crossing, so that magnetoresistance between the first and second nanowires can be measured.

An apparatus for providing a nanogap comprising:

• a first magnetic nanowire having at least one associated longitudinal length;
• and
• a second magnetic nanowire having at least one associated longitudinal length, the second magnetic nanowire disposed substantially parallel to the first magnetic nanowire by at least in part magnetic self-assembly to form the nanogap between at least a portion of their longitudinal lengths, the first and second nanowires touching or nearly touching each other.

An improvement in an apparatus for performing magnetic resonance force microscopy comprising:

• a nanowire cantilever resonator;
• and
• a metal colloidal nanoparticle coupled to the nanowire cantilever resonator as an optical nano-reflector to assist in vibration detection by the apparatus.

The improvement of 26 where the nanowire cantilever resonator comprises a nonmagnetic nanowire as its proximal portion fabricated with a single domain magnetic nanowire as its distal portion for generation of an ultra-high gradient magnetic field for single spin selection or force detection.

A nanoscale magnetic probe for spin transport measurements of a molecular sample comprising:

• a first magnetic nanowire;
• a second magnetic nanowire, the first and second magnetic nanowires arranged to form a point contact between them,
• measurement means for sensing magnetic signals between the first and second magnetic nanowires as a function of the molecular sample disposed between the first and second magnetic nanowires.