PPMS - Sonepat

PHYSICAL PROPERTY MEASUREMENT SYSTEM (PPMS) CRF Owned Facility Sonipat Campus

PPMS installed in CRF Sonipat campus is Cryogen Free Measurement System (CFMS) from Cryogenic Limited, UK. CFMS system combines the latest cryogen-free technology with sophisticated measurement techniques; providing a versatile, powerful investigative device achieving low temperatures and high magnetic fields without the use of liquid Helium or nitrogen. CFMS system has a Variable Temperature Insert (VTI) surrounding the sample chamber which allows to vary the sample temperature. The VTI is supported in the bore of the magnet. There is a Helium dump vessel, which contains Helium gas at room temperature in it. This Helium gas is circulated in VTI by an oil free pump called as scroll pump or VTI pump. Helium gas from dump vessel goes to cryostat from Helium inlet point present on the cryostat. As soon as Helium enters inside the cryostat, it passes through the activated charcoal trap, which captures the impurities present in the He gas. Post charcoal trap, Helium gas crosses first stage (40 K stage) and then second stage (4 K stage) of VTI. After second stage, there is Helium-pot in which the liquefied Helium is stored. Then, there is a needle valve, which controls the flow of Helium inside the VTI. Further, the system has a VTI heat exchanger, which consists of a Cernox sensor and a heater which adjusts the temperature of the Helium gas. After passing through the VTI, Helium gas goes back to the dump vessel via Helium outlet valve present on the cryostat and this process continues like a closed cycle refrigeration.

The system has two cryo-coolers which provide cooling to both the magnetic and the VTI. The cooling takes place by controlled expansion of the compressed Helium gas. Cryocoolers provide cooling at the first and second stages. The main function of the first stage is to cool the radiation shield around the low temperature parts of the system and also to pre-cool the circulating Helium. The second stage provides cooling to the magnet and the VTI.

PPMS System Specifications and Samples requirment

	Instrument Specifications :
a	Temperature range: 1.8 – 400 K
b	Max. magnetic field: ± 14 T Low Field Option: Max. magnetic field = ±38 mT
c	Sample nature: Powder, pellet, thin film, single crystal
	Mesurment Options:
1	Vibrating Sample Magnetometer (VSM) (1.8 – 400 K) (M-T,M-H) Thin Film sample size = 3 mm x 3 mm Pellet size (for mesurment upto 300 K ) = diameter< 5 mm Pellet / Thin Film / Crystal size (for mesurment above 300 K ) = 2 mm X 2mm Weight of powder sample/pellet = 10 mg to 20 mg (Both in-plane and out-of-plane mesurment can be done)
2	AC susceptibility (1.8 – 400 K) Thin Film Sample size = 3 mm x 3 mm Weight of powder sample/pellet – 6 mg to 10 mg AC frequency: 1 Hz – 17 kHz AC field amplitude (max.): 5 mT
3	DC resistivity (1.8 – 400 K) Sample size = (5 - 8) mm x 4 mm DC current: 1nA - 100 mA
4	Hall coefficient measurements (1.8 – 400 K) Sample size = (5 - 8) mm x 4 mm DC current: 1nA - 100 mA
5	AC resistivity (1.8 – 400 K) Sample size = (5 - 8) mm x 4 mm AC current: 1pA - 100 mA AC frequency: 250 mHz – 100 KHz
6	Heat capacity : (2-30 K, 20 – 300 K) ( Relaxation method ) Sample size = 1 mm x 1 mm x 1mm (LWH) Weight of the sample = 1 – 200 mg Sensitivity : 1 μ J / K Low-T region: 2 – 30 K High-T region: 20 – 300 K
7	Thermal Transport ( 2 - 350 K) Sample size: 2 mm x 2 mm x (10 - 15) mm (bar shaped sample is required) Thermal conductance measurement range: 1 – 10 mW/K
8	Seebeck coefficient measurements (2 – 350 K) Sample size: 2 mm x 2 mm x (10 - 15) mm (bar shaped sample is required)
9	Resistivity and Hall measurements using LCC 20 (1.8 - 400 K)

How to Book the PPMS Sonipat slot:

	Now, the PPMS Sonipat users can book the slots online directly. The slots will be opened regularly on a particular date and time (as notified on the CRF News Section). The details are given below:
1.	We will open PPMS slots in three different categories: i) Magnetic measurements (M-T/M-H/ACS) ii) Electrical transport measurement (DC Resistivity/AC Resistivity/Hall/LCC20) iii) Thermal transport measurements (Thermal conductivity/Seebeck/Heat capacity)
2.	We will open slots for 5 sessions (2 weeks) at a time as per tentative schedule given below: 1st week: Monday, Wednesday, Friday 2nd week: Tuesday and Thursday Whoever will book the slot online, those students will get to do their experiments in PPMS Sonipat in next two weeks and each student will get two successive slots (on working days) for his/her measurements. For example, if student books slot online on a Monday, he will get two successive slots of Monday and Tuesday, assuming both are working days (The student will be able to book Tuesday slot online later). The same will be applicable to everyone who will book the slot online
3.	Each user must book 1 session (2 successive slots). One slot will be booked online on the date of opening of slots and the next working day slot will be booked online later (before the date of the measurements).
4.	Each user will get 2 slots for Electrical and Magnetic Transport measurements. However, for performing Thermal Transport measurements, each user will get 3 slots (accordingly slots will be opened).
5.	We will put an advance notice on CRF News Section, for which measurement category we are opening the current slots. If any user books a slot for different measurement category (for which we have not opened the current slots), we will decline that slot request.
6.	Slot opening duration on rotational basis (might vary depending on the requirement of the users): i) Magnetic measurements – 2 months ii) Electrical measurements – 2 months iii) Thermal measurements – 1 month
7.	If there falls holiday(s) in a week, the slots will be managed accordingly.
8.	A particular user is allowed to use PPMS facility once in every two weeks. For example, if a user gets a PPMS slot for 07th July, then that user will not be allowed to use PPMS again before 22nd July .
9	One slot is for 8 hours, and charges are being paid per 8-hour slot.
10	Users MUST fill the details in online slot request form correctly and carefully. A slot request with incomplete information in the online request form will be declined.

Testing Charges (Click here)

How to contact

Lab-Physical Location & Sample mailing address :

PPMS Lab # 5,
Central Research Facilities (CRF), IIT Delhi Sonipat Campus Rajiv Gandhi Education City, Rai Industrial Area Rai, Sonipat – 131029 Haryana
Landmark: Near Ashoka University

Lab Coordinator

Prof. NIRAT RAY
203 A, Department of Materials Science and Engineering, Indian Institute of Technology, Hauz Khas New Delhi-110016
Email: nirat@mse.iitd.ac.in
Phone: 01126597974

Lab Operational In-charge

Dr. Dinesh Kumar Dixit
Principal Project Scientist
Email: dineshdixit@crf.iitd.ac.in
Phone: +91 11 2655 3129

Lab Operator

Ms. Neelam Bishnoi
Project Scientist
Email: ird600328@crf.iitd.ac.in
Phone: +91 11 2655 3129

Get CRF Registration for
External users

1. Registration process (One Time): New Registration for external users.User Verification: Upload photo of Front side and back side of valid Identity card issued by the organization (only .jpeg format, file Size less than 1 Mb, height less than 1000 pixels, width less than 800 pixels). Undertaking: Download the undertaking template ( Download Link ). Duly filled, signed and stamped form should be uploaded in .pdf format. Confirmation: An email will be sent to the user after verification of the documents.

2.Before planning to avail the Instrument facility of CRF IIT Delhi: user must visit https://crf.iitd.ac.in -> Facility -> select the desired facility from left side navigation list. Read carefully all the relevant information such as required sample type, testing charges and instrument location. Be prepared with details of the samples.

3.Log in and Click on Booking Appointment Tab: All the information relevant to testing must be filled in instrument booking form. In case user does not provide the required information the booking is liable to be rejected. User can upload the relevant existing data of their samples that might help in the measurements.

4.Sample submission & Payment Process: Once the application is submitted, the in-charge will verify the details and approve the request.External users must wait for the approval before making the payment and submitting the samples to concerned lab. After approval the payment should be made by the user. The payment transaction details need to be submitted online before appointment date time.

5.CRF Users can pay amount online using following details:
Beneficiary/Customer's Name: IRD ACCOUNT IITD
Bank Account Number: 10773572600
Bank Name: State Bank of India Branch Name: IIT Branch
Branch Code: 01077
NEFT IFSC CODE / RTGS: SBIN0001077
please write "CRF _Instrument Name" in the Remarks section while paying. Save the receipt file and upload in the crfbooking system online against your application.Payment can also made in form of demand draft in favour of " IRD ACCOUNT IITD " Payable at New Delhi.6.IIT Delhi
GST Number : 07AAATI0393L1ZI
PAN Number : AAATI0393L

Signup (External user)

CRF IIT Delhi
new user registration

IIT Delhi Internal User

External User Registration

Get CRF Registration for IITD Internal users

1 Registration process (One Time): New Registration for internal users.
Fill in all the details in Personal Information, Supervisor Information and User Login Credentionals.
Once submitted, an email to supervisor is sent for activation of account. Once activated by supervisor, you can do the instrument bookings.

2 Before planning to avail the Instrument facility of CRF IIT Delhi: user must visit https://crf.iitd.ac.in > Facilities > select the desired facility from left side navigation list. Read ca refully all the relevant information such as required sample type, testing charges and instrument location. Be prepared with details of the samples.

3. Log in on CRF Booking System and Click on Booking Appointment Tab: All the information relevant to testing must be filled in instrument booking form. In case user does not provide the required information the booking is liable to be rejected. User can upload the relevant existing data of their samples that might help in the measurements.

4 Sample submission & Payment Process: Once the application is submitted, the in-charge will verify the details and approve the request.

Signup (IIT Delhi user)