Abstract: Described are methods for magnetically actuating microcantilevers and magnetically actuated and self-heated microcantilevers. Also described are methods for determining viscoelastic properties and thermal transition temperatures of materials.
Type:
Grant
Filed:
March 14, 2013
Date of Patent:
December 16, 2014
Assignees:
The Board of Trustees of the University of Illinois, Anasys Instruments
Inventors:
William P. King, Craig Prater, Byeonghee Lee, Doug Gotthard
Abstract: The magnetic head inspection method includes, exciting the cantilever of a magnetic force microscope at a predetermined frequency, the cantilever being provided with a magnetic probe on the end thereof, floating the magnetic probe over the writing head of the magnetic head and two-dimensionally scanning a search range, detecting the specific position of the writing head based on the search two-dimensional magnetic field intensity of the writing head with exciting state of the cantilever in the two-dimensional scan, setting a shape detection range smaller than the search range for detecting the shape of the writing head based on the specific position, and floating the magnetic probe over the writing head with exciting state of the cantilever, detecting the shape of the writing head by detecting the detection two-dimensional magnetic field intensity of the writing head in the two-dimensional scan.
Abstract: Described are methods for magnetically actuating microcantilevers and magnetically actuated and self-heated microcantilevers. Also described are methods for determining viscoelastic properties and thermal transition temperatures of materials.
Type:
Grant
Filed:
November 23, 2011
Date of Patent:
September 10, 2013
Assignee:
The Board of Trustees of the University of Illinois
Inventors:
William P. King, Craig Prater, Byeonghee Lee
Abstract: A spin-torque probe microscope and methods of using the same are described. The spin-torque probe microscope includes a cantilever probe body, a magnetic tip disposed at a distal end of the cantilever probe body, an electrically conductive sample disposed proximate to the magnetic tip, an electrical circuit providing a spin-polarized electron current to the electrically conductive sample, and a vibration detection element configured to sense vibration frequency of the cantilever probe body. The spin-polarized electron current is sufficient to alter a local electron spin or magnetic moment within the electrically conductive sample and be sensed by the magnetic tip.
Abstract: A scanning probe microscopy head may include a base portion, cantilevers coupled to the base portion, and at least one tip coupled to each of the cantilevers. At least two of the cantilevers and associated tips may be configured to perform a different scanning probe microscopy technique. The cantilevers may be positioned perpendicular to the base portion and may be coupled to the perimeter of the base portion. The base portion may include circuitry coupled thereto for providing electricity to the tips. The cantilevers may each be placed into a recessed slot along the perimeter of the base and secured to the base by a securing mechanism, such as a spring clip. The cantilevers may be operatively coupled to a linear positioner, such as a piezoelectric motor, coupled to the perimeter of the base for controlling the amount of protrusion of the cantilevers from the perimeter of the base.
Type:
Grant
Filed:
June 25, 2007
Date of Patent:
October 6, 2009
Assignee:
The United States of America as represented by the Secretary of the Navy
Inventors:
Ryan P. Lu, Stephen D. Russell, Ayax D. Ramirez