University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Heat capacity measurements of Fe/Cr multi-layers.

Slides:



Advertisements
Similar presentations
Seminarul National de Nanostiinta si Nanotehnologie
Advertisements

Irmantas Barnackas, prof. L. Pranevičius Lithuanian Energy Institute Destabilization of Mg-based hydrogen storage materials: experimental results.
Gate Control of Spin Transport in Multilayer Graphene
GIANT MAGENTORESISCANCE AND MAGNETIC PROPERTIES OF ELECTRODEPOSITED Ni-Co-Cu/Cu MULTILAYERS.
University of California at Berkeley – Physics Department March APS Meeting, Portland, OR – March 17, 2010 Thermodynamic measurements of iron-rhodium alloys.
Quantum Mechanics and Spin-Valves Thomas Prevenslik QED Radiations Discovery Bay, Hong Kong The 13th IEEE Inter. Conf. on Nanotechnology, August 5-8, Beijing,
Synthesis of metal hydrides employing vapor deposition technologies Irmantas Barnackas, prof.L. Pranevičius Lithuanian Energy Institute
Project Objectives  A three-year research project on nanotribology of ultra-thin wear and oxidation resistant hard coatings was been initiated.  The.
Influence of Substrate Surface Orientation on the Structure of Ti Thin Films Grown on Al Single- Crystal Surfaces at Room Temperature Richard J. Smith.
CMSELCMSEL Hanyang Univ. Differences in Thin Film Growth Morphologies of Co-Al Binary Systems using Molecular Dynamics Simulation : In cases of Co on Co(001),
GROWTH AND INVESTIGATION OF HALF-METALLIC Fe 3 O 4 THIN FILMS B. Vengalis, V. Lisauskas, A. Lisauskas, K.Šliužienė, V. Jasutis Semiconductor Physics Institute,
University of California at Berkeley – Physics Department – Hellman Lab Application of “Calorimetry-on-a- Chip” Technology to Heat Capacities of Quenched.
Onset of non-colinear coupling in Fe/Cr trilayers observed at high temperatures S.M. Van Eek D. Aernout B. Croonenborghs J. Meersschaut M. Rots Instituut.
University of California at Berkeley – Physics Department March APS Meeting, Dallas, TX – March 23, 2011 Examining the AF > FM transition in Fe-Rh thin.
University of California at Berkeley – Physics Department – Hellman Lab MMM Conference (Austin, TX) – November 13, 2008 Heat capacity measurements of disordered.
Relaziation of an ultrahigh magnetic field on a nanoscale S. T. Chui Univ. of Delaware
University of California at Berkeley – Physics Department March APS Meeting, Dallas, TX – March 24, 2011 Calorimetry of epitaxial thin films David W. Cooke,
University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 15, 2006 Heat capacity measurements of sub- milligram.
Brillouin Light Scattering Studies of Magnetic Multilayers Cyrus Reed, Milton From Department of Physics and Astronomy, Western Washington University What.
Ion-beam Sputtering Deposition Vacuum System Thickness Monitor Substrate Heater (1000°C) Kaufman Ion Gun Multiple Target Holder Ar Cathode Anode Glow Discharge.
Sputtered ZnO based DMS thin films for nanoscale spintronics devices Background & Introduction The wurtzite transparent semiconductor ZnO was predicted.
Giant Magnetoresistance
Mg 2 NiH 4 thin films synthesis results. Main goals: hydrogenation of Mg 2 Ni thin films in high hydrogen pressure and temperature (p,T); analysis of.
Magnetic Data Storage. 5 nm Optimum Hard Disk Reading Head.
Magnetic Properties of Materials
KIT – University of the State of Baden-Wuerttemberg and National Research Center of the Helmholtz Association Thermal stability of the ferromagnetic in-plane.
PEALD/CVD for Superconducting RF cavities
Spintronics and Graphene  Spin Valves and Giant Magnetoresistance  Graphene spin valves  Coherent spin valves with graphene.
Magnetic domain characterization  Lorentz transmission electron microscopy (LTEM) imaging techniques are used to image the magnetic domain structure of.
Effect of swift heavy ion irradiation in Fe/W multilayer structures Sharmistha Bagchi a, S. Potdar a, F. Singh b, and N. P. Lalla a a) UGC-DAE Consortiums.
Daniel Wamwangi School of Physics
Magnetism in ultrathin films W. Weber IPCMS Strasbourg.
Fabrication and Properties of MSMA Thin Films Hierarchical Manufacturing and Modeling for Phase Transforming Active Nanostructures D.C. Lagoudas a, K.
We can further study switching out of the P state as a function of dc current Within our statistical accuracy (10,000 runs), data fits equilibrium model.
The Story of Giant Magnetoresistance (GMR)
Chemical and Materials Engineering Department, University of Cincinnati, Cincinnati, OH Nanoscale Ni/NiO films for electrode and electrochemical Devices.
Thin Film & Battery Materials Lab. National Research Lab. Kangwon Nat’l Univ. AS deposited LiCoO 2 thin film cathodes prepared by RF magnetron sputtering.
Thin Film & Battery Materials Lab. National Research Lab. Kangwon Nat’l Univ. Cycle performance of Si-based Thin Film Anodes for Li-ion Batteries Kwan-Soo.
The deposition of amorphous indium zinc oxide (IZO) thin films on glass substrates with n-type carrier concentrations between and 3x10 20 cm -3 by.
Reminders Quiz#2 and meet Alissa and Mine on Wednesday –Quiz covers Bonding, 0-D, 1-D, 2-D, Lab #2 –Multiple choice, short answer, long answer (graphical.
Improvement of Infrared Lights Sensitivity on PZT EMITER Daisuke Takamuro, Hidekuni Takao, Kazuaki Sawada and Makoto Ishida.
Introduction P. Chelvanathan 1, Y. Yusoff 2, M. I. Hossain 1, M. Akhtaruzzaman 1, M. M. Alam 3, Z. A. AlOthman 3, K. Sopian 1, N. Amin 1,2,3 1 Solar Energy.
R. Doerner, ITPA SOL/DIV meeting, Avila, Jan. 7-10, Be deposition on ITER first mirrors: layer morphology and influence on mirror reflectivity G.
Motivation There has been increasing interest in the fabrication and characterization of 1D magnetic nanostructures because of their potential applications.
Center for Materials for Information Technology an NSF Materials Science and Engineering Center Sputtering Procedures Lecture 11 G.J. Mankey
1 Deuterium retention and release in tungsten co- deposited layers G. De Temmerman a,b, and R.P. Doerner a a Center for Energy Research, University of.
Cascina, May 23, 2007LSC-VIRGO Joint Meeting Presentation of a new Virgo group INFN/University Genova Gianluca Gemme LIGO-G Z.
Develop (K 0.5 Na 0.5 )NbO 3 Lead-Free Ferroelectric Thin Films by the RF Sputtering Technique Hsiu-Hsien Su.
Investigation of Half-Metallic Magnetic Oxides Jinke Tang, University of Wyoming, DMR Polytetrafluoroethylene (C n F 2n+2 ), also known as Teflon,
By Abdullah Framalawi Aly Abouhaswa Polarized Neutron Spectrometry : Studying nanostructure magnetism with the use of polarized neutron reflectometry.
Updates and status on the next generation of Superconducting RF cavities 7 th of March 2013 Argonne National Laboratory DOE Review 2013 Speaker: Thomas.
The coating thermal noise R&D for the 3rd generation: a multitechnique investigation E. Cesarini 1,2), M.Prato 3), M. Lorenzini 2) 1)Università di Urbino.
LECTURE 2. Magnetic bubble Memory  It is a tiny movable magnetized cylindrical volume in a thin magnetic material that along with other like volumes.
Solar Cells need a top side conductor to collect the current generated They also need a conductive film on the backside.
Calorimetric Studies of Fe/Pt Multilayer Thin Films Ysela L. Chiari Prof. K. Barmak David C. Berry September 16, 2005.
Pulsed Energetic Condensation of Nb Thin Film Cavities at JLab
Effect of Heat Treatment on Properties of Sputtered Co100-xCux Film
Date of download: 11/9/2017 Copyright © ASME. All rights reserved.
Calorimetric Studies of Fe/Pt Multilayer Thin Films
Magnetic Data Storage and Nanotechnology
The route from fundamental science to technological innovation
Criteria of Atomic Intermixing during Thin Film Growth
New Process Capabilities for Media with The Intevac® 200 Lean System
Presented by: Bc. Roman Hollý
Motivation Oscillatory magnetic anisotropy originating from
IC AND NEMS/MEMS PROCESSES
MODIFICATION OF AZO THIN FILM PROPERTIES BY ANNEALING AND ION ETCHING
Growth Behavior of Co on Al(001) substrate
Sang-Pil Kim and Kwang-Ryeol Lee Computational Science Center
Mass Transport of Xe Multi-layers on Cu(111)
Presentation transcript:

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Heat capacity measurements of Fe/Cr multi-layers David W. Cooke, Frances Hellman University of California, Berkeley Matt Carey Hitachi Global Storage Technologies San Jose Research Center

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Motivation Nobel Prize Committee – 2007: “The discovery of giant magnetoresistance immediately opened the door to a wealth of new scientific and technological possibilities, including a tremendous influence on the technique of data storage and magnetic sensors.” FM NM How to measure DOS?

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Cr Fermi Surface Mattheis, 1965; Laurent, 1981; Fawcett, 1988 (100) plane

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 GMR Sensitivity to interface D.T. Pierce, J.A. Stroscio, J. Unguris, R.J. Celotta, PRB 49 (1994). M. Velez and I. K. Schuller, J. Mag. Mag. Mat. 184, 275 (1998). M.C. Cyrille, S. Kim, M. E. Gomez, J. Santamaria, C. Leighton, Kannan, M. Krishnan, and Ivan K. Schuller, PRB 62 (2000).

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Relaxation Calorimetry on a Chip Specific heat of thin films –200nm ~= 10µg –2K - 300K –0T - 8T 2006 APS Keithley Instrumentation Award Magnetron sputtered MMLs –t Fe 17.7A –Film thickness ~200nm –Substrate at RT Thermally evaporated Cu –~200nm thick –High k yields uniform temperature contours

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Characteristic specific heat Low T:

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Heat capacity of MMLs

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Sommerfeld values for MMLs

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Tri-layer model Chromium Fe/Cr Alloy Iron mJ/mol.K 2 !!!

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Sommerfeld values for MMLs

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 MML Characterization

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 XRD of MMLs

University of California at Berkeley – Physics Department – Hellman Lab March APS Meeting – March 13, 2008 Conclusions Fe/Cr MMLs exhibit well-defined enhancement of D.O.S. at Fermi energy –No field dependence –GMR-independent –Suggests interface effect Future directions: –More textured films –Vary roughness via sputtering pressure –Study of alloys