Project

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Sub-Kelvin high sensitivity magnetometer for magnetic materials exploration

English title Sub-Kelvin high sensitivity magnetometer for magnetic materials exploration
Applicant Ronnow Henrik M.
Number 121397
Funding scheme R'EQUIP
Research institution Laboratoire de magnétisme quantique EPFL - SB - IPMC - LQM
Institution of higher education EPF Lausanne - EPFL
Main discipline Condensed Matter Physics
Start/End 01.07.2008 - 30.06.2012
Approved amount 298'683.00
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Keywords (9)

Magnetism; Physics; Spintronics; Magnetization; SQUID; low-temperature; magnetometer; hysteresis; coercivity

Lay Summary (English)

Lead
Lay summary
Magnetization measurements is the cornerstone of research in magnetic materials, from complex quantum magnetism to high-tech materials science. This project establlishes a state of the art SQUID magnetometer combined with a 3He cooling system, a high-temperature oven and a pressure cell. It will allow fast and reliable measurements over 3 orders of magnitude in temperature range from 0.3K to 700K, and measurements under high pressures to 10kbar, both with hitherto unprecedented sensitivity. The facility will serve a broad userbase within EPFL and we are open to requests from anywhere in Switzerland
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Publications

Publication
Dipolar Antiferromagnetism and Quantum Criticality in LiErF4
Kraemer C, Nikseresht N, Piatek JO, Tsyrulin N, Dalla Piazza B, Kiefer K, Klemke B, Rosenbaum TF, Aeppli G, Gannarelli C, Prokes K, Podlesnyak A, Strassle T, Keller L, Zaharko O, Kramer KW, Ronnow HM (2012), Dipolar Antiferromagnetism and Quantum Criticality in LiErF4, in SCIENCE, 336(6087), 1416-1419.
Effect of Ca substitution on crystal structure and superconducting properties of ferromagnetic superconductor RuSr2-xCaxGd1.4Ce0.6Cu2O10-delta
Fallahi S, Mazaheri M, Nikseresht N, Ronnow HM, Akhavan M (2012), Effect of Ca substitution on crystal structure and superconducting properties of ferromagnetic superconductor RuSr2-xCaxGd1.4Ce0.6Cu2O10-delta, in JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 324(6), 949-954.
Magnetic hourglass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe1+yTe0.7Se0.3
Tsyrulin N, Viennois R, Giannini E, Boehm M, Jimenez-Ruiz M, Omrani AA, Piazza BD, Ronnow HM (2012), Magnetic hourglass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe1+yTe0.7Se0.3, in NEW JOURNAL OF PHYSICS, 14, 073025-073025.
Micro-fabrication process for small transport devices of layered manganite
Omrani AA, Deng G, Radenovic A, Kis A, Ronnow HM (2012), Micro-fabrication process for small transport devices of layered manganite, in JOURNAL OF APPLIED PHYSICS, 111(7), 07E129-07E129.
Site-selective quantum correlations revealed by magnetic anisotropy in the tetramer system SeCuO3
Zivkovic I, Djokic DM, Herak M, Pajic D, Prsa K, Pattison P, Dominko D, Mickovic Z, Cincic D, Forro L, Berger H, Ronnow HM (2012), Site-selective quantum correlations revealed by magnetic anisotropy in the tetramer system SeCuO3, in PHYSICAL REVIEW B, 86(5), 054405-054405.
Pair correlations, short-range order, and dispersive excitations in the quasi-kagome quantum magnet volborthite
Nilsen GJ, Coomer FC, de Vries MA, Stewart JR, Deen PP, Harrison A, Ronnow HM (2011), Pair correlations, short-range order, and dispersive excitations in the quasi-kagome quantum magnet volborthite, in PHYSICAL REVIEW B, 84(17), 172401-172401.
Crystal growth and characterization of the dilutable frustrated spin-ladder compound Bi(Cu1-xZnx)(2)PO6
Wang S, Pomjakushina E, Shiroka T, Deng G, Nikseresht N, Ruegg C, Ronnow HM, Conder K (2010), Crystal growth and characterization of the dilutable frustrated spin-ladder compound Bi(Cu1-xZnx)(2)PO6, in JOURNAL OF CRYSTAL GROWTH, 313(1), 51-55.
Superconducting phase in the layered dichalcogenide 1T-TaS2 upon inhibition of the metalinsulator transition
Xu P, Piatek JO, Lin PH, Sipos B, Berger H, Forro L, Ronnow HM, Grioni M (2010), Superconducting phase in the layered dichalcogenide 1T-TaS2 upon inhibition of the metalinsulator transition, in PHYSICAL REVIEW B, 81(17), 172503-172503.

Associated projects

Number Title Start Funding scheme
112301 Agrégats séléctionés en taille dans des matrices solides 01.04.2006 Project funding (Div. I-III)
130522 Quantum Magnetism - Dimer Physics and Dipolar Criticality 01.04.2010 Project funding (Div. I-III)
150257 Dimensional and Anisotropy Control of Model Quantum Magnets 01.01.2014 Project funding (Div. I-III)
132877 Magnetic Excitations in Low-Dimensional Arrays of Quantum Spins 01.01.2011 Project funding (Div. I-III)
110869 Mn and Cu doped nanowires prepared by electrodeposition in ion track templates 01.10.2005 SCOPES
111625 Magnetic excitations driven by spin injection 01.07.2006 Project funding (Div. I-III)
116590 From Quantum Phase transitions to Addressable Spin Clusters 01.04.2007 Project funding (Div. I-III)
117817 Magnetic excitations in novel metal-organic quantum materials and molecular magnets 01.01.2008 Project funding (Div. I-III)
133815 Setup for studies of quantum phenomena in condensed matter systems at ultra-low temperatures in magnetic vector fields 01.04.2012 R'EQUIP
146870 Quantum Magnetism - Spinons, Skyrmions and Dipoles 01.04.2013 Project funding (Div. I-III)
121898 Dimer Physics - from new Quantum Phases to Superconductivity 01.01.2009 Project funding (Div. I-III)
172659 New materials for honeycomb-lattice and single-ion magnets 01.08.2017 Project funding (Div. I-III)
102831 Strong magnetic fluctuations in low-dimensional spin lattices 01.11.2004 SNSF Professorships
108042 Vibrating Quantum Magnets 01.10.2005 Project funding (Div. I-III)
126751 Nanofabricated devices based on intrinsically layered correlated electron materials 01.12.2009 Project funding (Div. I-III)
162110 Harnessing Molecular Crystals for Quantum Magnets and Elucidating Quantum Critical Physics 01.03.2016 Bilateral programmes

Abstract

The study of magnetism in materials remains at the forefront of contemporary condensed matter physics. It ranges from the study of fundamental collective quantum effects, through novel electronic properties in emerging materials to the technologically inspired field of spintronics. Common to all of these fields is that the most fundamental quantity that can be measured is the magnetization, and how it develops with temperature, applied magnetic field and varying sample parameters. Essentially, it is the prerequisite to any other investigations.Here we propose to acquire a state of the art SQUID magnetometer combined with a 3He cooling system, a high-temperature oven and a pressure cell. It will allow fast and reliable measurements over 3 orders of magnitude in temperature range from 0.4K to 800K, and measurements under high pressures to 10kbar, both with hitherto unprecedented sensitivity. There exist in Europe only one other SQUID magnetometer with the 0.4K option included in this request.The applicant’s Laboratory for Quantum Magnetism (LQM) studies materials displaying fundamental collective quantum phenomena using the combination of neutron scattering techniques and laboratory-based bulk measurements. The activities span from new materials discovery to unraveling the fundamentals of quantum physics and the enigma of correlated electron superconductivity. Essentially all projects in the laboratory (of which selected specific examples are outlined in section 2) require access to accurate magnetization measurements, and a significant fraction of the projects requires measurements to temperatures below 2 Kelvin. The requested SQUID magnetometer will boost research within the laboratory, provide an advantage towards competing labs in other countries, and be a source for new collaborations and projects.The co-applicant’s Laboratory of the Physics of Nanostructured Materials (LPMN) studies spintronics - i.e. devices exploiting coupled electronic and magnetic states of electrons - the most notable example being the Nobel-rewarded giant-magneto- resistance now used in hard-disks. Complementing the transport measurements on in-house fabricated samples, it is of outmost importance to characterize the magnetic properties. No equipment is currently available with sufficient sensitivity to measure magnetization of the nano-structured materials. The requested SQUID magnetometer will be an invaluable addition to the laboratory’s research.The equipment will be a facility open to users and collaborators from EPFL, Switzerland and internationally. Specifically, the scientific case includes sub-projects from collaborators at Uni. Bern, ETH-Zürich and PSI, and intentions of use have been expressed by groups in the Institute of Chemistry, the Institute of Materials and the Institute of Micro-Engineering, and even from Swiss industry.
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