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[Fizinfo] Szilárd-kollokvium (kedd 14:30), Morpurgo a 2D mágnesekről

From: Dr. Dóra Balázs <dora.balazs AT ttk.bme.hu>
To: "fizinfo AT lists.kfki.hu" <fizinfo AT lists.kfki.hu>
Subject: [Fizinfo] Szilárd-kollokvium (kedd 14:30), Morpurgo a 2D mágnesekről
Date: Thu, 12 May 2022 14:47:36 +0000
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MEGHÍVÓ

a Szilárd Leó Kollokvium előadására

Alberto Morpurgo
(Univ. Geneve)

“2D magnetic materials”

Kivonat: I will discuss our research on 2D magnetic materials and
heterostructures. After a short introduction, I will present results on
atomically thin multilayers of different magnetic semiconductors such as
CrI3, CrCl3 (layered antiferromagnets), MnPS3 (antiferromagnetic within
individual layers), and CrBr3 (ferromagnetic semiconductors). Using
atomically thin, exfoliated crystals, we form tunnel barriers that enable
magnetism to be probed by magnetotransport measurements. Examples of observed
phenomena include: i) a giant tunneling magnetoresistance in CrI3; ii) a full
characterization of the magnetic phase diagram of CrCl3 multilayers; iii) the
observation of a spin-flop transition in MnPS3 persisting to the ultimate
thickness of an individual monolayer, and iv) the demonstration that the
tunneling magnetoresistance of ferromagnetic CrBr3 barriers depends on
magnetic field and temperature only through the magnetization (from well
above to well below the Curie temperature). We conclude that measurements of
the temperature and magnetic field dependence of the tunneling
magnetoresistance allow precise information about the magnetic state of
atomically thin crystals to be obtained, something impossible to do with most
conventional experimental techniques, not sufficiently sensitive when used on
such a small amount of material.

Helye: BME Fizikai Intézet, Fizika Tanszék
Budafoki út 8. F-épület, 2. emelet, 13-as terem

Ideje: 2022. május 17. (kedd), 14:30.
Kapunyitás 14.15-től.
Program: http://physics.bme.hu/kollokviu

Minden érdeklődőt szívesen látunk!

Dóra Balázs és Zaránd Gergely

[Fizinfo] Szilárd-kollokvium (kedd 14:30), Morpurgo a 2D mágnesekről, Dr . Dóra Balázs, 05/12/2022