Lakeshore 74046 - User Manual

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Methods and apparatus disclosed and described herein have been developed solely on company funds of
Lake Shore Cryotronics, Inc. No government or other contractual support or relationship whatsoever has existed
which in any way affects or mitigates proprietary rights of Lake Shore Cryotronics, Inc. in these developments.
Methods and apparatus disclosed herein may be subject to U.S. Patents existing or applied for.
Lake Shore Cryotronics, Inc. reserves the right to add, improve, modify, or withdraw functions, design modifications,
or products at any time without notice. Lake Shore shall not be liable for errors contained herein or for incidental or
consequential damages in connection with furnishing, performance, or use of this material.
Rev. 1.0 P/N 119-6
05 15 July 2
010
Manual Addendum to the
7400 Series VSM
Model
74046
Magnetoresistance
Insert Probe Option
Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, Ohio 43082-8888 USA
sales@lakeshore.com
service@lakeshore.com
www.lakeshore.com
Fax: (614) 891-1392
Telephone: (614) 891-2243

Summary

Limited Warranty Statement

Certification

Trademark Acknowledgment

1.0 Introduction

1.1 Model 74046 Magnetoresistance Insert Option Part List

Lists the components included in the MR insert option kit.

1.2 Specifications

Details technical specifications of the MR insert probe option.

2.0 Software Installation

2.1 MR Measurement System Configuration

Guides the user through configuring the MR software for hardware.

2.1.8 Install Software Key

Explains the requirement and installation of the MR software key.

3.0 MR Operation

3.1 Switching from VSM to MR Mode

Describes the procedure to switch between VSM and MR operational modes.

3.2 Sample Exchange

Provides instructions for safely exchanging samples in the MR insert.

3.3 Installing the MR Insert

Details the steps for physically installing the MR insert probe.

3.3.1 Attach the Cables

Instructions for connecting the necessary cables to the MR insert.

3.3.2 Install and Adjust the MR Head Lock (Optional)

Guide to installing and adjusting the MR head lock for proper VSM head suspension.

3.3.3 Install the MR Insert Probe Option

Steps to connect the MR insert probe to the VSM head.

3.4 MR Software Operation

Overview of operating the MR software, including its interface segments.

3.4.1 Calibrating the Gaussmeter

Procedure to zero the gaussmeter probe for accurate measurements.

3.4.2 Creating a Sample Definition File (*.Mrs)

How to create a file for storing sample identification information.

3.4.3 Creating a Measurement Setup File (*.Mrm)

Explains how to build measurement sequences using control and experiment steps.

3.4.3.1 Control Steps

Describes basic commands for performing measurements like Go to Angle, Go to Temperature, etc.

3.4.3.2 Experiment Step: Contact Formation

Process to create ohmic contacts by applying voltage across probe points.

3.4.3.3 Experiment Step: IV Contact Checking Measurement

Measures voltage vs. current to assess contact quality.

3.4.3.4 Experiment Step: R Vs. Field Measurement

Records resistance (R) as a function of magnetic field (B).

3.4.3.4.1 Variable Field Measurement-Field Profile Dialog Box

Defines the magnetic field sweep type and segments for measurement.

3.4.3.4.2 Variable Field Measurement-Measurement and Analysis Setup

Configures parameters like current, dwell time, and resolution for R vs. Field measurement.

3.4.3.5 Experiment Step: R vs.Temperature Measurement

Measures resistance (R) as a function of temperature.

3.4.3.6 Experiment Step: R vs. Angle

Measures resistance (R) as a function of angle.

3.4.4 Executing a Measurement

Steps to load, save, and start a measurement sequence.

3.4.5 Displaying Data From a Measurement Results File

How to open and view measurement results.

3.4.6 Using Manual Modes

Accessing manual control for field and temperature.

3.4.6.1 Manual Field Control

Manually setting the magnetic field strength.

3.4.6.2 Manual Temperature Control

Manually setting the sample temperature.

3.4.7 Operating a Temperature Device

Procedures for operating the MR insert with VSM temperature options.

4.0 MR Measurements

4.1 Sample Size and Pin Placement

Discusses sample dimensions and how pin placement affects measurements.

4.1.1 Correcting a Skew in the MR Curve

Identifies and addresses skew errors in MR curves due to misalignment.

4.1.1.1 Testing for Skew

Procedure to test for asymmetry in MR curves.

4.1.1.2 Re-Seating Probe Points with the Sample

Steps to re-seat probe points to correct measurement skew.

4.1.1.3 Post-Processing Data Results

Methods for post-processing data, like field averaging, to reduce errors.

4.2 Maximizing Repeatability of R Measurement

Guidelines for achieving consistent R measurements.

4.2.1 Handling the Sample

Best practices for handling samples to ensure reproducible placement.

4.2.2 Constructing a Sample Guide

Advice on creating a guide for consistent sample placement.

4.2.3 Pin Maintenance

Information on maintaining and replacing probe pins.

5.0 Maintenance

5.1 Disassembling the MR Insert Probe

Detailed steps to take apart the MR insert probe.

5.2 Replace Internal Parts

Procedures for replacing internal components of the MR insert.

5.2.1 Replace Ceramic Holder and Pin Guide

Guide to replacing the ceramic holder and pin guide.

5.2.2 Solder the Probe Pins to the PCB

Instructions for soldering probe pins to the printed circuit board.

5.3 Reassemble the MR Insert Probe

Steps to put the MR insert probe back together.

5.3.1 Reassemble the MR Internal Assembly

How to reassemble the internal components of the MR insert.

5.3.2 Reassemble the Top Cover to the Body

Steps to attach the top cover to the MR insert body.

Lakeshore 74046 Specifications

General

Brand	Lakeshore
Model	74046
Category	Measuring Instruments
Language	English